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80results about How to "Improve long cycle stability" patented technology
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Vinylene carbonate-based lithium ion battery polymer electrolyte and preparation method as well as application thereof
ActiveCN105826603AImproved magnification performanceImprove long cycle stabilitySolid electrolytesSecondary cellsPolymer electrolytesIn situ polymerization
The invention discloses a vinylene carbonate-based lithium ion battery polymer electrolyte and a preparation method as well as application thereof in a room-temperature full-solid lithium ion battery. The vinylene carbonate-based lithium ion battery polymer electrolyte comprises vinylene carbonate or a copolymer of vinylene carbonate, lithium salt, a porous backing material and an additive, wherein the molecular weight of a vinylene carbonate-based polymer is 172-1*10<7> Da; the ionic conductivity of the vinylene carbonate-based polymer electrolyte is 1*10<-3>-1*10<-5>S / cm at 25 DEG C; the initial decomposition voltage range is 4.5-5.2 V vs.Li<+> / Li. The vinylene carbonate-based electrolyte is prepared by the in-situ polymerization method, so that the electrolyte has excellent interfacial compatibility with electrodes. The vinylene carbonate-based polymer electrolyte can be used in the room-temperature full-solid lithium ion battery; the vinylene carbonate-based polymer electrolyte is excellent in electrochemical oxidation reduction stability, and can be used in high voltage resistant polymer electrolyte materials. The invention further provides the preparation method of the vinylene carbonate-based lithium ion battery polymer electrolyte, and a lithium ion battery made of the electrolyte.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
Targeted nanoparticle drug for magnetic hyperthermia treatment on malignant tumors
InactiveUS20110177153A1Improve heating effectIncrease powerPowder deliveryEnergy modified materialsSpecific adsorptionCancer cell
The present invention relates to a targeted magnetic nanoparticle drug and the preparation method thereof. The targeted magnetic nanoparticle drug comprises an effector molecule and a guidance molecule in a weight ratio of 1:0.0001-0.20. The aforesaid effector molecule is a magnetic particle, with a particle size of not more than 1000 nm and a specific adsorption rate (SAR) of 10-7000 W / gFe. The aforesaid guidance molecule comprises an antibody, a ligand or a magnetic particle. The particle size of the aforesaid targeted drug is 2-1000 nm. The targeted magnetic nanoparticle drug is prepared by coupling a magnetic particle and a guidance molecule in a weight ratio of 1:0.0001-0.20 in water, organic or inorganic substance or the mixed solution thereof. The resultant targeted magnetic nanoparticle drug can realize targeted magnetic hyperthermia treatment and targeted magnetic thermoablation treatment and prevention on the tumors, and effectively kill the cancer cells, and cure the malignant tumors.
Owner:ZHU HONG
MXene/metal sulfide composite material, anode material and preparation and application
ActiveCN111180694AHigh theoretical capacityLow costNegative electrodesSecondary cellsHigh energyMetallic sulfide
The invention belongs to the technical field of high-performance / high-energy-density lithium ion battery negative electrodes, and particularly relates to an MXene / metal sulfide composite material, ananode material and preparation and application. The preparation method comprises the following steps: mixing and stirring a metal salt of a transition metal element and an MXene material, and carryingout solid-liquid separation and drying to obtain an MXene / metal salt mixture; and under a protective atmosphere, mixing the MXene / metal salt mixture with a sulfur source, and carrying out heat treatment to obtain the MXene / metal sulfide composite material. The invention also provides a sulfur-doped MXene / metal sulfide-based composite battery anode material. The anode material comprises the MXene / metal sulfide composite material. The anode material provided by the invention has good long-cycle stability, high energy density and excellent rate capability, and can be applied to various fields.
Owner:GUANGDONG UNIV OF TECH +1
Ether electrolyte and lithium air battery
InactiveCN103996892ANot volatileImprove oxygen solubilityFuel and primary cellsFuel and secondary cellsCharge dischargeOxygen
The invention provides ether electrolyte. The ether electrolyte comprises lithium salt and an organic solvent, wherein the organic solvent comprises one or more of 1,2-dimethoxyethane, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether and tetraethylene glycol dimethyl ether. The ether electrolyte has advantages that the ether electrolyte is unlikely to volatize, the oxygen dissolving degree is high, the electrochemical stable window is wide, and the like, and has excellent chemical stability for a discharging intermediate product O2<-1> or LiO2 and a discharging final product Li2O2. The lithium air battery prepared by utilizing the ethers electrolyte is excellent in long cycling stability. The experimental result shows that a charging-discharging curve is not obviously changed after the lithium air battery assembled by utilizing the ether electrolyte is circularly charged and discharged for 30 times at a limit capacity of 1,000mAh / g under the current density of 100mA / g.
Owner:常州盈华高科储能材料科技有限公司 +1
Spinel composite material, preparation method and application thereof
InactiveCN102315440AImprove electronic conductivityImproved magnification performanceCell electrodesLi-accumulatorsSpinelNitrogen
The invention relates to a spinel composite material, a preparation method and application thereof. The composite material provided by the invention has a general formula of CxNy-(LaM'b)4(McM''d)5O12-eAf, wherein the CxNy is a compound containing carbon and nitrogen. The invention also provides a preparation method and application of the composite material. The invention also provides a cathode comprising the composite material of the invention, and a lithium battery and an electrochemical supercapacitor comprising the cathode. The composition material of the invention has high electronic conductivity and ionic conductivity, particularly high multiplying performance and high cyclical stability.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
Preparation method and application of polycarbonate-based polymer electrolyte
ActiveCN109802174AImprove ionic conductivityImprove long cycle stabilityFinal product manufactureElectrolyte accumulators manufacturePolymer scienceElectrolysis
The invention relates to a preparation method and application of a polycarbonate-based polymer electrolyte and belongs to the technical field of lithium ion batteries. According to the preparation method of the present invention, vinyl ethylene carbonate, conductive lithium salt, a porous support material, and a solvent are adopted to prepare the polymer electrolyte. The preparation process of thepolymer electrolyte is simple, easy to control, and has excellent mechanical properties; the thickness of the polymer electrolyte ranges from 50-500 microns; the room temperature ionic conductivity of the polymer electrolyte is larger than 10<-3> S cm<-1>; and the electrochemical window of the polymer electrolyte is larger than 4.7 V. According to the polymer electrolyte adopted, the growth of lithium negative pole dendritic crystals can be effectively inhibited, and the compatibility of the polymer electrolyte with an interface and the long cycle performance of the polymer electrolyte can beimproved. With the polymer electrolyte adopted, a solid-state lithium ion battery can work for a long time at room temperature. The polymer electrolyte has good flexibility and is suitable for flexible lithium ion battery devices of wearable electronic devices.
Owner:BEIJING UNIV OF TECH
Core-shell material
ActiveCN109428061AImprove securityGood storage stabilityCell electrodesSecondary cellsPhysical chemistryCore shell
The invention discloses a core-shell material. A core material of the core-shell material is selected from at least one of compounds having the molecular formulae as shown in formula (I) and formula (II); and the core-shell material is prepared by a method of a multilayer precursor. The core-shell material is applied to the field of a lithium ion battery as a positive electrode material, and has good air stability and safety performance while the high capacity advantage is exerted.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
High-nickel positive electrode material, preparation method thereof and lithium ion secondary battery
ActiveCN112382741AReduce surface residual alkaliImprove thermal stabilityElectrode thermal treatmentSecondary cellsPhosphoric acidCyclic stability
The invention relates to the field of positive electrode materials, and provides a high-nickel positive electrode material, a preparation method thereof, and a lithium ion secondary battery. The high-nickel positive electrode material comprises secondary particles, wherein the secondary particles comprise a plurality of primary particles, the primary particles comprise an active substance, the general chemical formula of the active substance is LibNixCoyMzNwO2, 0.95 <=b <=1.05, 0.8 <=x < 1, 0<y+z<=0.2, x+y+z=1, 0.0001<=w<=0.003, M is selected from at least one of Mn and Al, and N is a metal; acoating layer which comprises a first coating layer and a second coating layer, wherein the first coating layer is formed on the surface of the primary particle, the second coating layer is formed onthe surface of the secondary particle, and each of the first coating layer and the second coating layer contains a phosphoric acid compound. According to the high-nickel positive electrode material,the preparation method thereof and the lithium ion secondary battery, the cost is low, large-scale production can be realized, and the rate capability and the cycling stability of the lithium batterycan be effectively improved.
Owner:SHENZHEN CITY BATTERY NANOMETER TECH
Compound of molecular beacons for diagnosing lung cancers and preparation method thereof
InactiveCN102154474AImprove long cycle stabilityAvoid devouringMicrobiological testing/measurementMicrosphereMagnetite Nanoparticles
The invention discloses a compound of molecular beacons for diagnosing lung cancers. The compound comprises a magnetic nano microsphere and the molecular beacons adsorbed on the magnetic nano microsphere. The compound is characterized in that acc+Cct+Atca+Cgat+Tagcattaa is a circular sequence; the basic groups expressed with capitals in the circular sequence are the basic groups treated through locked nucleic acid modification; and the magnetic nano microsphere comprises magnetic nanoparticles and chitosan coating the surfaces of the magnetic nanoparticles. The compound has the beneficial effect of overcoming the defect that the molecular beacons in the prior art easily generate false positive signals during living cell detection and can resist degradation of nuclease in the living cells and detect miR-155 in the living cells, thus realizing diagnosis and differential diagnosis of the lung cancers.
Owner:THE SECOND AFFILIATED HOSPITAL ARMY MEDICAL UNIV
Positive electrode material for sodium phase rich sodium-ion batteries and preparation method and application thereof
ActiveCN108832099AImprove conductivityAlleviate volume changesCell electrodesSecondary cellsSodium phosphatesSodium-ion battery
The invention belongs to the technical field of sodium-ion battery materials, and specifically discloses a positive electrode material for sodium phase rich sodium-ion batteries which is a composite material of sodium phase rich titanium-manganese-sodium phosphate and carbon; and the chemical formula of the sodium phase rich titanium-manganese-sodium phosphate is Na3+4xMnTi1-x(PO4)3, wherein x isgreater than 0 and smaller than or equal to 0.3. The invention also discloses preparation of the composite material and application thereof in the sodium-ion batteries. According to the composite material, the sodium phase rich titanium-manganese-sodium phosphate is creatively adopted, and the content of sodium in the material is improved through an appropriate proportion of titanium defect. Redundant sodium content in the character is beneficial for maintaining the stability of the structure in the process that sodium ions are taken out, and then the long cycling stability of the material ispromoted. Moreover, the sodium phase rich titanium-manganese-sodium phosphate is cooperative with carbon, so that the electrical properties, such as capacity and cycle performance, of the obtained composite material can be promoted obviously. Moreover, the system of Na-Mn-Ti-P-O is rich in resources and low in cost, and the preparation method is simple in operation and wide in commercial application prospects.
Owner:湖南钠邦新能源有限公司
Silicon-carbon composite material, and preparation method and application thereof
ActiveCN112652742AEasy to prepareLow costMaterial nanotechnologyCell electrodesCarbon compositesNano silicon
The invention provides a preparation method of a silicon-carbon composite material. The preparation method comprises the following steps: pulverizing a silicon-based alloy, and carrying out dealloying to obtain micron silicon powder; dispersing the micron silicon powder into a solution containing a first carbon source, and performing crushing treatment to obtain primary coated nano silicon slurry; mixing the nano silicon slurry with a second carbon source, uniformly stirring, drying and roasting to obtain a secondary coated precursor; and carrying out chemical vapor deposition on the precursor in a third carbon source atmosphere to obtain the three-stage coated silicon-carbon composite material. The silicon-carbon composite material can be used as a good lithium ion battery negative electrode active material, by constructing multiple buffer coating layers, the high capacity and the first coulombic efficiency of the battery are ensured, meanwhile, the long cycle stability is effectively improved, the tap density can also be kept at a relatively high level, and the silicon-carbon composite material has very good comprehensive performance. The preparation method is simple and low in cost, and the preparation process is suitable for large-scale production and has a good industrial prospect.
Owner:CHINA PETROLEUM & CHEM CORP +1
Sulfur-containing polymer solid electrolyte as well as preparation method and application thereof
ActiveCN110828891AImprove lithium ion conductivityEasy to prepareFinal product manufactureElectrolyte accumulators manufactureSolid state electrolytePhysical chemistry
The invention discloses a sulfur-containing polymer solid electrolyte as well as a preparation method and application thereof. The sulfur-containing polymer solid electrolyte comprises a sulfur-containing polymer, a lithium salt and a porous support material; the molecular weight of the sulfur-containing polymer is 2000-50000 Da, and the mass fraction of the sulfur-containing polymer in the sulfur-containing polymer solid electrolyte is 35%-85%. The sulfur-containing polymer solid electrolyte is applied to preparation of a solid lithium battery. The sulfur-containing polymer solid electrolyteprovided by the invention has relatively high lithium ion conductivity and a relatively wide electrochemical window; the solid-state lithium battery provided by the invention can realize rapid charging and discharging, is good in rate capability, and has excellent long-cycle stability.
Owner:柔电(武汉)科技有限公司
Three-dimensional current collector for metal lithium negative electrode of primary/secondary battery, metal lithium negative electrode and primary/secondary battery
ActiveCN110444767AGrowth inhibitionHigh capacity charge/dischargeElectrode manufacturing processesNon-aqueous electrolyte cellsLithium dendriteElectrical battery
The invention provides a three-dimensional current collector for a metal lithium negative electrode of a primary / secondary battery, which is a nano-network having a porous structure and formed by weaving carbon nano-tubes or carbon nano-tube bundles. The three-dimensional current collector for the metal lithium negative electrode of the primary / secondary battery refers to a three-dimensional carbon nano-tube network material which has the three-dimensional porous structure formed by weaving the carbon nano-tubes or the carbon nano-tube bundles and used for containing metal lithium, can suppress the growth of lithium dendrites in the metal lithium secondary battery, and can realize high-capacity discharge under high current density. The metal lithium negative electrode of the primary / secondary battery prepared from the three-dimensional current collector has extremely high long cycling stability and can be charged and discharged for multiple times by extremely high specific capacity; and meanwhile, the composite negative electrode shows good rapid charge and discharge capacity.
Owner:UNIV OF SCI & TECH OF CHINA
Transition metal cobalt single atom/cluster embedded nitrogen-doped carbon skeleton material, and preparation method and application thereof
InactiveCN110364705ACluster uniformEvenly dispersedCell electrodesSecondary cellsElectrolytic agentElectrical battery
The invention discloses a transition metal cobalt single atom / cluster embedded nitrogen-doped carbon skeleton material, and a preparation method and application thereof. The preparation method comprises the following steps: adding a cobalt source, a nitrogen-containing carbon source and silicon dioxide into a solvent, and carrying out ultrasonic stirring; carbonizing the obtained mixture in an inert atmosphere; carrying out pickling and etching on the obtained product in hydrochloric acid and hydrofluoric acid, and then washing and drying to obtain the transition metal cobalt single atom / cluster embedded nitrogen-doped carbon skeleton material. The method is simple in step and high in repeatability, and for the transition metal cobalt single atom / cluster embedded nitrogen-doped carbon skeleton, a mixed structure is endowed with enhanced electron conduction, and a large amount of uniformly dispersed N-C and Co-Nx active sites are introduced, thereby facilitating absorption of lithium ions and promotion of the interface reaction of the electrode material and the electrolyte. When being used as a lithium ion battery negative electrode material, the metal cobalt single atom / cluster embedded carbon hybrid material shows ultrahigh electrochemical activity and has very high potential application value.
Owner:SOUTH CHINA UNIV OF TECH +1
Hollow foam autocatalytic electrode and preparation method thereof
PendingCN111809196ASimple compositionLarge specific surface areaLiquid/solution decomposition chemical coatingElectrode shape/formsChemical industryPtru catalyst
The invention belongs to the technical field of electrochemical catalytic electrodes, and particularly relates to a hollow foam autocatalytic electrode and a preparation method thereof. The autocatalytic electrode is a hollow foam structure electrode constructed by a transition metal catalyst, and is obtained through coating a conductive transition metal catalyst with macromolecule foam, and thenremoving the macromolecule foam through high-temperature treatment. The catalyst is selected from an alloy or a compound consisting of a transition metal and one or more elements of boron, phosphorus,carbon, nitrogen, sulfur and oxygen; the transition metal is one or more of nickel, cobalt, iron, cerium, copper, manganese, vanadium, tungsten and molybdenum; the macromolecule foam is selected frommelamine resin foam, polyurethane foam, polystyrene foam and polyethylene foam. The autocatalytic electrode is low in cost, simple in structure, high in catalytic activity, good in cycling stabilityand excellent in mechanical strength, and has industrial practical value in the fields of water electrolysis, chlor-alkali chemical industry, sewage treatment, industrial catalysis, battery electrodesand the like.
Owner:FUDAN UNIV
Multi-element partitioned doped cobalt-free positive electrode material and preparation method thereof
ActiveCN113299907AAdaptive stress reliefAvoid imbalanceSecondary cellsPositive electrodesMetallurgyPhysical chemistry
The invention provides a multi-element partitioned doped cobalt-free positive electrode material. The molecular formula of the material is LixNiaMnbAlcMgdWeO2, wherein 0.95<=x<=1.1, 0.5<=a<=0.9, 0.1<=b<=0.5, 0<c<=0.01, 0<d<=0.01, 0<e<=0.01, a+b=1; and the positive electrode material sequentially comprises an Al doped region, an Mg doped region and a W doped region from inside to outside; the invention also provides a preparation method of the positive electrode material. According to the cobalt-free positive electrode material, the positive electrode material doped with Al, Mg and W elements in a partitioned mode can better adapt to stress release, moderate adjustment is achieved, and unbalance is avoided, so that the material is more stable in structure and better in rate capability and cycle performance, and the preparation method of the material is simple in process, easy to implement and suitable for industrial production; and the positive electrode material with excellent structure and performance can be stably prepared.
Owner:ZHUJI PAWA NEW ENERGY
High-energy density ferrous phosphate lithium battery electrolyte and lithium ion battery
InactiveCN109802179AIncrease energy densityImprove long cycle stabilityFinal product manufactureElectrolyte accumulators manufactureLithium electrodePhosphate
Owner:DONGGUAN SHANSHAN BATTERY MATERIALS +1
Preparation and application of PEO-based film coated silicon carbon electrode
InactiveCN110931714AConduction does not hinderReduce sheddingSecondary cellsNegative electrodesLithium-ion batteryBattery cell
The invention provides a preparation method and application of a PEO-based thin film coated silicon carbon electrode. The method comprises the following steps: 1) preparing a silicon-carbon negative electrode plate as a substrate; 2) preparing a PEO-based mixed solution, and blade-coating the prepared solution on a silicon-carbon electrode substrate; and 3) airing the silicon-carbon electrode plate to obtain the silicon-carbon electrode coated with the PEO-based film, and applying the silicon-carbon electrode to the lithium ion battery. A mixed solution of PEO and a lithium salt is prepared byutilizing the elasticity of PEO and the property that the lithium salt can conduct lithium ions. Blade-coating the mixed solution on a silicon-carbon electrode plate to form a layer of protective film; and when the PEO mass concentration of the PEO-based mixed solution is 3%, the battery shows optimal cycling stability. In the charging and discharging process, the lithium salt in the film can conduct lithium ions, the elastic PEO film can buffer stress caused by volume expansion in the charging and discharging process, and breakage and smashing of the electrode plate are reduced.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Polymer electrolyte of high-voltage window
InactiveCN110690500AImprove ionic conductivityHigh ion mobilitySecondary cellsOrganic electrolytesSide chainIonic Channels
The invention discloses polymer electrolyte of a high-voltage window, and relates to the field of lithium ion battery electrolyte. A hydrogen-containing organosilicon compound is used as a main chain,and ethylene carbonate is used as a side chain, a conductive lithium salt, an organic solvent and an initiator. Graft polymerization is performed through adoption of a chemical method, the construction of the hydrogen-containing organosilicon compound used as the main chain can be used as a skeleton, so that the electrochemical stability window, mechanical properties and thermal stability of thepolymer electrolyte are improved, and an ion channel can also be provided; the side-chain ethylene carbonate is used as a main ion channel of the polymer electrolyte, so that the ionic conductivity and the ionic migration number of the polymer electrolyte are improved, the interfacial compatibility of the polymer electrolyte and an electrode material is improved, and the charge-discharge performance of the solid-state lithium ion battery is improved.
Owner:BEIJING UNIV OF TECH
Cellulose-coated graphene composite carbon aerogel as well as preparation method and application thereof
InactiveCN112615004ALow costRich reservesCell electrodesCarbon preparation/purificationCelluloseFreeze-drying
The invention discloses cellulose-coated graphene composite carbon aerogel as well as a preparation method and application thereof. The preparation method comprises the following steps: adding cotton cellulose into a sodium hydroxide solution; placing a mixed solution formed in the previous step at a low temperature, mixing the mixed solution with a graphene oxide solution at a low temperature, and then performing stirring to obtain a cellulose-coated graphene oxide mixed solution; pouring the cellulose-coated graphene oxide mixed solution into a mold, and conducting standing at room temperature to obtain cellulose-coated graphene oxide hydrogel; carrying out freeze drying on the cellulose-coated graphene oxide hydrogel to obtain cellulose-coated graphene oxide aerogel; and carrying out high-temperature pyrolysis on the cellulose-coated graphene oxide aerogel to obtain the cellulose-coated graphene composite carbon aerogel. The cellulose-coated graphene composite carbon aerogel is used in an electrode structure for inducing directional growth of lithium dendrites so as to achieve the effect of protecting a battery diaphragm.
Owner:XI AN JIAOTONG UNIV
Preparation method of N-doped Co nanocluster/N-doped porous carbon/S composite material for positive electrode of high-performance potassium-sulfur battery
ActiveCN111180700AHigh catalytic activityHigh crystallinityCell electrodesSecondary cellsPorous carbonElectrical battery
The invention provides a preparation method of an N-doped Co nanocluster / N-doped porous carbon / S composite material for a positive electrode of a high-performance potassium-sulfur battery. ZIF-67 is used as an initial raw material, and an N-doped Co nanoparticle / N-doped porous carbon composite material is obtained through low-temperature long-time staged carbonization and acid aqueous solution soaking; and the obtained N-doped Co nanoparticle / N-doped porous carbon composite material is compounded with sulfur to obtain the N-doped Co nanocluster / N-doped porous carbon / S composite material. According to the method disclosed by the invention, a Co-N bond with high catalytic activity can be formed in situ, and the carbon matrix with a hierarchical pore structure and the Co nanocluster are combined to be used as the positive electrode material of the potassium-sulfur battery, so that the electrochemical performance of the potassium-sulfur battery can be remarkably improved.
Owner:SHANDONG UNIV
Method for improving long cycle performance of thick electrode of layered positive electrode material under high voltage
PendingCN114361409AGuaranteed uniformityGuaranteed orderCell electrodesElectrolytic agentElectrochemical response
The invention belongs to the technical field of lithium batteries, and particularly relates to a method for improving the long cycle performance of a layered positive electrode material thick electrode under high voltage. The method comprises the steps that after slurry mixing and coating are conducted, a solvent in slurry is dried, through the liquid phase-solid phase-gas phase conversion process of the solvent, the uniformity of liquid-phase slurry and the orderliness of solid-phase slurry are kept for final dried electrode components, and the low-tortuosity thick electrode with directionally-arranged pore channels is formed. On one hand, the conductive agent and the binder in the low-tortuosity electrode are uniformly distributed, and on the other hand, the construction of the lithium ion transmission pore channel is beneficial to full infiltration of an electrolyte on a pole piece and rapid transmission of lithium ions, so that a sufficient electron and lithium ion transmission network around each particle in the electrode can be effectively ensured; the uniformity of electrochemical reaction in the thick electrode is ensured, and the cracking of particles caused by the volume change of each special shape is effectively avoided, so that the long-cycle stability is improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Preparation method of tantalum oxide/tantalum carbide composite material as well as product and application thereof
ActiveCN112751005AShorten the diffusion distanceSolve reunionCell electrodesSecondary cellsLithium-ion batterySolvothermal reaction
The invention discloses a preparation method of a tantalum oxide / tantalum carbide composite material as well as a product and application of the tantalum oxide / tantalum carbide composite material. The preparation method comprises the following steps of: uniformly mixing acetylacetone, an organic solvent, a tantalum source and phenolic resin, preserving heat and refluxing to obtain a complex; performing solvothermal reaction on the complex to obtain precursor powder containing the tantalum source and a carbon source; and fully grinding the precursor powder, and carrying out heat treatment under the protection of inert gas to obtain the tantalum oxide / tantalum carbide composite material. The prepared tantalum oxide / tantalum carbide composite material can be used as a lithium ion battery electrode material. The tantalum oxide / tantalum carbide composite material has the advantages of simplicity in operation, few steps, short period and low energy consumption, solves the problem of agglomeration in a high-temperature process, is beneficial to shortening the diffusion distance of ions, and has obvious advantages as a lithium ion battery electrode material due to good conductivity and chemical stability of tantalum carbide.
Owner:WUHAN UNIV OF SCI & TECH
Silicon-carbon composite material, and preparation method and application thereof
PendingCN112652739AHigh specific capacityImprove long cycle stabilitySecondary cellsNegative electrodesCarbon compositesSilicon monoxide
The invention provides a silicon-carbon composite material, and a preparation method and application thereof. The method comprises the following step: evenly mixing silicon monoxide, silicon, an organic carbon source and graphite to obtain a mixture, placing the mixture in water, and stirring to obtain a suspension; crushing the suspension, and drying to obtain a precursor; and roasting the precursor to obtain the silicon-carbon composite material. According to the method, graphite is used as a carbon source, silicon monoxide and silicon are used as double silicon sources, the advantages of the graphite and the silicon monoxide are combined, the cycling stability of the silicon-carbon composite material is effectively improved, in addition, an organic carbon source is added for compounding, the first coulombic efficiency is improved while the high specific capacity is guaranteed, and the silicon-carbon composite material has excellent comprehensive performance. The preparation method is low in raw material cost, simple in process and easy for industrial production, and has a good application prospect when being used as a lithium ion battery negative electrode material.
Owner:CHINA PETROLEUM & CHEM CORP +1
MXene-based flexible self-supporting electrode material and preparation method thereof
ActiveCN111554881AImprove conductivityImproved magnification performanceSecondary cellsPositive electrodesElectrolytic agentElectrolyte
The invention relates to an MXene-based flexible self-supporting electrode material and a preparation method thereof. The MXene-based flexible self-supporting electrode material is prepared by carrying out suction filtration on a mixed solution of MXene and an active substance and carrying out film uncovering; the flexible electrode material prepared by the method provided by the invention has excellent conductivity and a regular two-dimensional structure and the like; and the dissolution behavior of the active substance in the electrolyte can be inhibited to a certain extent through the hydrogen bond acting force formed between the active substance and a series of groups such as -OH,-COOH and the like on the surface of the MXene, such that the electrochemical performance and the active site utilization rate of the material are improved.
Owner:DONGHUA UNIV
Electrolyte and lithium ion battery comprising same
ActiveCN113013489AImprove long cycle stabilityDissolution inhibitionSecondary cells servicing/maintenanceElectrolytic agentOrganic solvent
The invention provides an electrolyte and a lithium ion battery comprising the same. The electrolyte adopted by the invention comprises a non-aqueous organic solvent, an electrolyte lithium salt and an electrolyte functional additive, wherein the electrolyte functional additive contains a polynitrile compound and a bis (trimethylsilyl) nitrogen-containing heterocyclic compound. The inventor creatively discovers that a Si-N bond in the bis (trimethylsilyl) nitrogen-containing heterocyclic compound has higher electronegativity compared with a C-N bond in a polynitrile compound, and can be preferentially combined with a proton H < + > generated by oxygenolysis of electrolyte components, so that weakening of the complexing ability of the proton H < + > on the polynitrile compound is avoided, and the stability of the electrolyte is improved. Compared with a single multi-nitrile compound, the synergism of the two can better stabilize the interface property of a positive electrode / electrolyte, and inhibit the dissolution of transition metal ions and the further oxygenolysis of electrolyte components, so that the lithium ion battery applying the electrolyte system has excellent long cycle stability.
Owner:ZHUHAI COSMX BATTERY CO LTD
Preparation method of lithium nickel cobalt manganate for coated power battery.
ActiveCN108832083AWrap implementationImprove bindingCell electrodesSecondary cellsManganateMetal particle
The invention discloses a preparation method of lithium nickel cobalt manganate for coated power battery. The method comprises the following steps: 1) preheating the lithium nickel cobalt manganate particles; 2) heating the metal to be coated to boiling under an inert gas atmosphere to obtain metal vapor; 3) blowing the preheated lithium nickel cobalt manganate particles into a pyrolysis furnace with an inert gas, and simultaneously blowing metal vapor into the pyrolysis furnace for reaction with the inert gas; 4) the obtained particles are sent to a mixer through an inert gas, and mixed withan oxygen-containing mixed gas to form a solid-gas mixture; 5) the solid-gas mixture is sent to a pyrolysis furnace for reaction. The invention adopts the method of molten metal vapor to coat the lithium nickel cobalt manganate, the metal particles can be uniformly adhered on the surface of the lithium nickel cobalt manganate particles by the fine particles, the coating of the ultra-thin layer isrealized, the molten metal is firmly combined with the cathode material, is not easy to fall off, the coating stability is good, and the performance of the lithium nickel cobalt manganate cathode material can be remarkably improved.
Owner:GUANGDONG BRUNP RECYCLING TECH +1
Cyanopolymer modified sulfur cathode and high-performance lithium sulfur battery composed of same
InactiveCN110098375AImprove long cycle stabilityFinal product manufactureLi-accumulatorsLithium–sulfur batterySpray coating
The invention belongs to the technical field of lithium sulfur batteries, in particular to a cyanopolymer modified sulfur cathode and a high-performance lithium sulfur battery composed of the same. The main component of the coating of the sulfur cathode of the invention is cyanopolymer, and the sulfur cathode is obtained by modifying the surface of the sulfur cathode with cyanopolymer through scrape-coating (or spin-coating, spray-coating or transfer-printing) and drying the cyanopolymer. The method provided by the invention is simple to operate and easy to apply, and the polymer coating can adsorb polysulfides and inhibit the 'shuttle effect' of polysulfides. Therefore, the long cycle stability and specific discharge capacity of lithium sulfur batteries are greatly improved, and a new method is provided for the development of long-life lithium sulfur batteries.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
A kind of polyvinylene carbonate-based lithium ion battery polymer electrolyte and its preparation method and application
ActiveCN105826603BImproved magnification performanceImprove long cycle stabilitySolid electrolytesSecondary cellsIn situ polymerizationElectrical battery
The invention discloses a vinylene carbonate-based lithium ion battery polymer electrolyte and a preparation method as well as application thereof in a room-temperature full-solid lithium ion battery. The vinylene carbonate-based lithium ion battery polymer electrolyte comprises vinylene carbonate or a copolymer of vinylene carbonate, lithium salt, a porous backing material and an additive, wherein the molecular weight of a vinylene carbonate-based polymer is 172-1*10<7> Da; the ionic conductivity of the vinylene carbonate-based polymer electrolyte is 1*10<-3>-1*10<-5>S / cm at 25 DEG C; the initial decomposition voltage range is 4.5-5.2 V vs.Li<+> / Li. The vinylene carbonate-based electrolyte is prepared by the in-situ polymerization method, so that the electrolyte has excellent interfacial compatibility with electrodes. The vinylene carbonate-based polymer electrolyte can be used in the room-temperature full-solid lithium ion battery; the vinylene carbonate-based polymer electrolyte is excellent in electrochemical oxidation reduction stability, and can be used in high voltage resistant polymer electrolyte materials. The invention further provides the preparation method of the vinylene carbonate-based lithium ion battery polymer electrolyte, and a lithium ion battery made of the electrolyte.
Owner:中科深蓝汇泽新能源(青岛)有限责任公司
Coral-like strip-shaped porous carbon as well as preparation method and application thereof
PendingCN113735121AHigh carbon yieldRaise the defect levelCarbon compoundsCell electrodesPorous carbonLithium-ion battery
The invention provides a preparation method of coral-like strip-shaped porous carbon, which comprises the following steps: mixing coal pitch and a template activator, and calcining at high temperature to obtain the coral-like strip-shaped porous carbon. The invention also provides the porous carbon. The invention further provides application of the coral-like strip-shaped porous carbon. The raw material is hard coal pitch which is a byproduct in the coal hot working process, and the ultrahigh carbon content enables the prepared carbon-based material to have higher carbon yield, so that the carbon-based material is an ideal carbon precursor capable of realizing large-scale application; meanwhile, the coral-like strip-shaped porous carbon material is stable in structure and high in defect degree, so that higher lithium storage specific capacity and faster lithium storage reaction kinetics are shown, the energy density of a commercial lithium ion battery / capacitor can be greatly improved, and therefore, the service life of the commercial lithium ion battery / capacitor can be greatly prolonged.
Owner:SHANDONG ENERGY GRP +1
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