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34results about How to "Improve interface impedance" patented technology
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Method and system for heating solid tissue
InactiveUS7001379B2Improve interface impedanceSurgical needlesSurgical instruments for heatingSolid tissueRadio frequency
Method for heating tissue by delivering radio frequency energy through tissue electrodes having controlling energy delivery so that an abrupt increase in impedance between the electrodes and the tissue is observed, typically in the form of an abrupt decrease in power delivered to the electrodes. The power at which the impedance increases and / or the time required to induce such an increase in impedance, are relied on to determine acceptable ranges to achieve a maximum sustainable delivery of radio frequency energy to the tissue consistent with complete, rapid, and uniform heating of the tissue.
Owner:BOSTON SCI SCIMED INC
High-voltage lithium-ion battery electrolyte
InactiveCN104466250AImprove electrochemical reactivityPromote circulationSecondary cellsOrganic electrolytesElectrolytic agentPhysical chemistry
The invention relates to the technical field of lithium-ion battery electrolytes, in particular to a high-voltage lithium-ion battery electrolyte. The high-voltage lithium-ion battery electrolyte comprises non-aqueous solvent, lithium salt and an additive. The additive comprises the mixture of phosphonitrile, annular sulphate and hydrogen fluoroether. The high-voltage lithium-ion battery electrolyte can form a film on the surface of an electrode through the synergistic effect of the phosphonitrile, the annular sulphate and the hydrogen fluoroether, oxygenolysis of the electrolyte is restrained, and the cycle performance of 4.5 V and 5.0 V high-voltage lithium-ion batteries is obviously improved.
Owner:DONGGUAN SHANSHAN BATTERY MATERIALS
Gel composite positive pole plate, preparation method thereof and method for preparing all-solid-state lithium battery
ActiveCN107591536AImprove performanceImprove interface impedanceElectrode manufacturing processesLi-accumulatorsAll solid stateLayered structure
The invention discloses a gel composite positive pole plate. The gel composite positive pole plate is characterized by comprising a positive active substance, a conductive agent, a gel electrolyte, abinding agent and a current collector, wherein the binding agent, the conductive agent, the gel electrolyte and the positive active substance form a layered structure on a surface of the current collector, and the conductive agent and the gel electrolyte are uniformly dispersed in the positive active substrate and are associated via the binding agent. The invention also discloses a method for preparing the gel composite positive pole plate and a method for preparing an all-solid-state lithium battery.
Owner:QINGTAO KUNSHAN ENERGY DEV CO LTD
Electrolyte of high-voltage lithium ion battery
InactiveCN108666623AImprove cycle stabilityGuaranteed cycle stabilitySecondary cellsOrganic electrolytesOrganic solventInterface impedance
The invention provides an electrolyte for a high-voltage lithium ion battery, and belongs to the field of a lithium ion battery. The electrolyte comprises a non-aqueous organic solvent, a lithium saltand an additive, wherein the non-aqueous organic solvent is an ester solvent, the mass percent of the non-aqueous organic solvent accounts for 95% or above, the lithium salt is LiPF6, the concentration of the lithium salt is (1.0-1.5)mol / L, the additive is a mixture of a dinitrile compound and a boron-containing compound, and the mass percent of the additive accounts for 1-5%. The electrolyte employing the mixture of the dinitrile compound and borate as an electrolyte additive is applicable to a high-voltage positive electrode material LiNi<0.5>Mn<1.5>O<4> system, it is found that the interface impedance of the lithium ion battery positive electrode material can be improved by such the electrolyte, and moreover, the cycle stability of the lithium ion battery under a normal temperature isimproved.
Owner:UNIV OF SCI & TECH BEIJING
High-safety solid-state electrolyte, preparation method and application thereof
ActiveCN111969245AEasy to makePreparation non-toxicSolid electrolytesLi-accumulatorsIsocyanatePlasticizer
The invention relates to a high-safety solid-state electrolyte and a preparation method thereof, and application in a lithium secondary battery. According to the invention, a solid-state electrolyte precursor solution comprises a lithium salt, an isocyanate-containing compound and a hydroxyl-containing polymer monomer, a solid-state electrolyte is obtained by polymerizing the precursor solution, the polymerization temperature ranges from 20 DEG C to 80 DEG C, the solid-state electrolyte precursor solution further comprises one or more of a plasticizer, an active monomer, an initiator and a catalyst, and the solid-state electrolyte contains polymerizable groups, and can be subjected to a polymerization reaction at a temperature higher than 100 DEG C to form a polymer with a cross-linked network structure, so that the lithium battery does not generate internal short circuit under extremely high temperature conditions such as heat abuse and the like, and the safety performance of the lithium battery is improved.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
Polymer gel electrolyte membrane, preparation method and sodium ion battery
InactiveCN107154513AImprove mechanical stabilityStable interfacial compatibilitySecondary cellsElectrolyte immobilisation/gelificationPolymer sciencePolyethylene glycol
The invention discloses a preparation method of a polymer gel electrolyte membrane. The preparation method includes following steps: S1, mixing polyethylene glycol diglycidyl ether, polyether amine and solvent to obtain a precursor solution; S2, applying the precursor solution on a porous thin film, and heating for reaction to obtain a polymer membrane supported by the porous thin film; S3, soaking the polymer membrane in liquid-state electrolyte to adsorb the same to obtain the polymer gel electrolyte membrane supported by the porous thin film. The polymer gel electrolyte membrane is high in mechanical stability, ion conductivity and compatibility with a metal sodium interface. The invention further provides the polymer gel electrolyte membrane prepared by the method and a sodium secondary battery using the polymer gel electrolyte membrane.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
Method for preparing polymer gel electrolyte cell
ActiveCN103178303AHigh purityImprove ionic conductivityFinal product manufactureElectrolyte accumulators manufactureLithiumPolymer science
The invention discloses a method for preparing a polymer gel electrolyte cell. The method comprises the following steps of: (1) polymer powder pretreatment: performing high-speed ball-milling on a polymer powder body, and thus obtaining powder with the granularity less than 1 mu m; (2) polymer powder dispersion: mixing the polymer powder which is obtained by ball-milling in the step (1) with a non-aqueous solvent, lithium salt and an additive to prepare sub-micron-sized polymer suspended dispersion liquid; and (3) electrolyte gelatinization: injecting the polymer suspended dispersion liquid which is prepared in the step (2) into a lithium ion cell for full immersion, gelatinizing at high temperature for 1 to 12 hours, and cooling to obtain the polymer gel electrolyte cell. Compared with the prior art, the polymer gel electrolyte cell prepared by using the method is high in ionic conductivity, low in battery internal resistance, long in cycle life, high in high-temperature performance, high in safety performance and free from liquid leakage risk. The polymer gel electrolyte cell is obviously superior to an electrolyte cell prepared by using a conventional preparation method in terms of comprehensive performance.
Owner:DONGGUAN AMPEREX TECH
Non-aqueous electrolyte and lithium ion battery
ActiveCN111082139AIncrease HOMO levelImprove conductivitySecondary cells servicing/maintenanceHigh temperature storageElectrolytic agent
The invention provides a non-aqueous electrolyte and a lithium ion battery. The non-aqueous electrolyte comprises a solvent, an electrolyte lithium salt and a functional additive, wherein the functional additive comprises 4,4'-dipinacol borate diphenyl sulfone, dipyridyl carbonate and lithium difluorophosphate. When the electrolyte provided by the invention is applied to a lithium ion battery of ahigh-nickel ternary material / graphite system, the impedance of the lithium ion battery can be remarkably reduced, the power performance of the lithium ion battery can be improved, gas production of the lithium ion battery in circulation and storage processes can be remarkably inhibited, and the rate capability, the normal-temperature cycle performance, the high-temperature cycle performance, thehigh-temperature storage performance and the safety performance of the lithium ion battery are remarkably improved.
Owner:DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
Solid state electrolyte membrane electrical core layer structure interface processing method, and lithium electrical core structure
InactiveCN108493483AReduce interface impedanceAffect conductivityFinal product manufactureLi-accumulatorsSolid phasesHot pressing
The invention belongs to the technical field of lithium battery, and especially relates to a solid state electrolyte membrane electrical core layer structure interface processing method, and a lithiumelectrical core structure. The solid state electrolyte membrane electrical core layer structure interface processing method comprises following steps: a solid state electrolyte membrane is provided;an electrode active material layer is formed on the solid state electrolyte membrane so as to form a pre-electrical-core layer structure; a preset hot pressing temperature and a preset pressing pressure are adopted for hot pressing treatment of the pre-electrical-core layer structure, wherein the preset hot pressing temperature and the preset pressing pressure are the critical temperature and thecritical pressure of conversion of solid phase into mobile phase of the solid state electrolyte membrane. Under the preset hot pressing temperature and the preset pressing pressure, the solid state electrolyte membrane is converted from solid phase into liquid phase, so that the interface resistance between the solid state electrolyte membrane and the electrode active material is reduced preferably, and the conductivity of conductive ions between the solid state electrolyte membrane and the electrode active material is improved.
Owner:成都亦道科技合伙企业(有限合伙)
Lithium battery separator coated with mixed coating layer and preparation method of lithium battery separator
InactiveCN108847470AHigh strengthImprove high temperature resistanceCell component detailsMicrometerThermal stability
The invention discloses a lithium battery separator coated with a mixed coating layer and a preparation method of the lithium battery separator. The lithium battery separator comprises a basic film and the coating layer, wherein the coating layer is formed by coating a mixed coating layer dispersion paste at one side or two sides of the basic film. The preparation method comprises the steps of mixing an organic main material and an inorganic main material to obtain the mixed coating layer dispersion paste under effects of a co-solvent, a binding agent and a pore forming agent; coating the paste onto the lithium battery basic film to obtain a separator with the coating layer being 1-2 micrometers; and finally, quenching the coating separator by a quenching agent, and obtaining the lithium battery separator coated with the mixed coating layer after drying. The lithium battery separator has high strength, good thermal stability and excellent gas permeability, and meanwhile, the lithium battery separator is simple in fabrication process, low in cost and can be produced on a large scale.
Owner:HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
High-voltage electrolyte containing novel additive
InactiveCN108232299ALess side effectsImprove interface impedanceSecondary cells servicing/maintenanceOrganic electrolytesOrganic solventSulfate
The invention discloses high-voltage electrolyte containing a novel additive. The high-voltage electrolyte is prepared from the following raw materials in percentage by mass: lithium salt, 85 to 95 percent of organic solvents, 2 to 8 percent of additives A and 5 to 8 percent of additives B. The high-voltage electrolyte containing the novel additive has the advantages that dibenzothiophene sulfonecontaining sulfur elements is used as a high-voltage additive of the lithium-ion electrolyte; the battery interface resistance is improved; the high-voltage performance of a lithium-ion battery is improved; the negative element material can be effectively coated by ethyl ester sulfate; the room temperature cycle performance under high voltage is greatly improved.
Owner:QINGYUAN JIAZHI NEW MATERIAL RES INST CO LTD +1
Preparation method of solid electrolyte with surface coating and solid electrolyte battery
ActiveCN111106380AGuaranteed conductivityImprove interface impedanceSecondary cellsElectrolytesSolid state electrolyteElectrolytic agent
The invention discloses a preparation method of a solid electrolyte with a surface coating. The preparation method comprises the steps of preparation of an LLZO ceramic chip, preparation of FS glue, formation of the solid electrolyte and the like. The invention further provides a solid-state electrolyte battery which comprises the solid electrolyte prepared by the preparation method of the solid electrolyte with the surface coating, and further comprises a positive electrode layer and a negative electrode layer which are arranged on the two sides of the solid electrolyte. The solid electrolyteprepared by the method has the advantages that firstly, an inorganic ceramic material is doped with Ga and Nb elements, so that the cubic phase structure of LLZO is stabilized, and the ionic conductivity is correspondingly improved; secondly, the two sides of the inorganic solid electrolyte are coated with the mixed fumed silica in the lithium ion electrolyte, so that the problem of interface contact is effectively solved, and the lithium ion conductivity of the lithium ion electrolyte is ensured; and the solid electrolyte of the solid electrolyte battery is prepared by the preparation methodof the solid electrolyte with the surface coating, and has the advantages of small interface impedance, high lithium ion conductivity and the like.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Solid electrolyte membrane, preparation method and battery
ActiveCN112310472AThe overall impact on transmission performance is smallImprove antioxidant capacitySolid electrolytesSecondary cellsSolid state electrolyteInterface impedance
The invention provides a solid electrolyte membrane, a preparation method thereof and a battery comprising the solid electrolyte membrane. The solid electrolyte membrane comprises a base membrane anda first polyoxyethylene membrane laminated on one surface of the base membrane, only the surface, facing the outer side, of the first polyoxyethylene membrane comprises a -C2H4-xFxO- structure, and xis an integer of 1-4. According to the invention, the surface of a PEO membrane is subjected to fluoridation treatment, so that the oxidation resistance of the electrolyte membrane is improved and theservice life of the battery is prolonged on the premise that the total influence on the lithium ion transmission performance of the membrane is minimum; meanwhile, a fluorinated layer has a relatively strong bonding effect on the surface of a pole piece, so that the interface impedance of the electrolyte membrane and pole piece can be improved, and the cycle performance of the battery is improved.
Owner:CHINA AVIATION LITHIUM BATTERY RES INST CO LTD
High temperature and high voltage resisting electrolyte for lithium ion battery
ActiveCN104701571AImprove interface impedanceImprove cycle performanceSecondary cellsOperating temperature rangeLithium electrode
The invention relates to an electrolyte for a lithium ion battery. The electrolyte includes lithium salt, an organic solvent and an additive, and tris (trimethylsilyl) boron is adopted as the additive. The electrolyte is applied to the lithium ion battery, the work voltage of the electrolyte ranges from 4.5 V to 4.7 V, the work temperature range is the indoor temperature of 60 DEG C, the good high temperature and high voltage resisting circulating performance is achieved, and the high temperature and high voltage functional nonaqueous electrolyte is simple and easy to obtain.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Sulfide solid electrolyte sheet and preparation method thereof
ActiveCN112242555AReduce bindingReduce conductivityFinal product manufactureElectrolyte accumulators manufactureSolid state electrolyteLithium metal
The invention provides a sulfide solid electrolyte sheet and a preparation method thereof. The invention provides a sulfide solid electrolyte sheet which comprises a sulfide electrolyte material and aboron element doped in the sulfide electrolyte material, and the relative deviation (B0B100) / B0 between the mass concentration B0 of the boron element at any position on the surface of the electrolyte sheet and the mass concentration B100 of the boron element at a position 100 [mu] m away from the position does not exceed 20%. In the sulfide solid electrolyte sheet disclosed in the application, the boron element introduced into the sulfide solid electrolyte can effectively reduce the binding effect of anions on lithium ions, and improve the transmission capacity of the lithium ions; the boronelement is uniformly distributed in the sulfide solid electrolyte, the doping uniformity and the conductivity of the solid electrolyte are improved, and the surface roughness of the solid electrolytesheet is remarkably improved, so that the diffusion process of lithium ions in the sulfide solid electrolyte sheet and a lithium metal anode interface is facilitated, the interface impedance is reduced, and the cycle performance of the battery is improved.
Owner:CONTEMPORARY AMPEREX TECH CO
Alkali metal negative electrode-electrolyte integrated material, preparation method thereof and application of alkali metal negative electrode-electrolyte integrated material in assembling solid-state battery in air
PendingCN114256440AGood air barrierAvoid contactSolid electrolytesFinal product manufactureHigh volume manufacturingElectrical battery
The invention belongs to the technical field of solid-state batteries, and discloses an alkali metal negative electrode-electrolyte integrated material and application of a preparation method of the alkali metal negative electrode-electrolyte integrated material to assembly of a solid-state battery in air. The method comprises the following steps: dissolving or dispersing an electrolyte component with an alkali metal protection function in an organic solvent, stirring to form electrolyte slurry, coating the slurry on the surface of an alkali metal material in a protective atmosphere, and volatilizing the organic solvent to obtain the alkali metal negative electrode-electrolyte integrated material. The process is simple and convenient, the operability is high, the coating area and thickness of the material are easy to control, and mass production is easy. The material can effectively block air and water so as to effectively protect an alkali metal negative electrode, the material can be used for assembling an alkali metal solid-state battery in an air environment, the assembling difficulty and environmental requirements can be reduced, and the production cost is further reduced. The material can also effectively reduce the interface contact resistance of an alkali metal negative electrode and an electrolyte, can inhibit the generation of alkali metal dendritic crystals, and improves the cycling stability of the prepared solid-state battery.
Owner:SOUTH CHINA AGRI UNIV
Preparation method of solid electrolyte
ActiveCN112242556AReduce bindingImprove transmission performanceSolid electrolytesFinal product manufactureSolid state electrolyteAll solid state
The invention provides a preparation method of a solid electrolyte, which comprises the following steps: dispersing a lithium precursor and a central atom ligand in an organic solvent to form a reaction primary mixed solution; dispersing borate in an organic solvent to form a modified solution; mixing the reaction primary mixed solution with the modified solution, and drying to obtain an initial product; conducting grinding, cold pressing and heat treatment on the initial product to obtain the solid electrolyte. According to the preparation method provided by the invention, borate is used as adoping raw material to modify the sulfide solid electrolyte, and the B and O co-doped sulfide solid electrolyte can be obtained; in the doping modification process, sufficient mixing between the sulfide electrolyte raw material and borate is realized; the borate is completely decomposed at the phase-forming temperature of the sulfide electrolyte, so that the introduction of impurities or the residue of reactants is reduced, the ionic conductivity of the prepared sulfide solid electrolyte is remarkably improved, and the energy density of the all-solid-state battery is favorably exerted.
Owner:CONTEMPORARY AMPEREX TECH CO
Functionalized polyolefin composite diaphragm and preparation method and application thereof
ActiveCN111725466AImprove thermal stabilityGood electrical propertiesMaterial nanotechnologyCell component detailsElectrolytic agentPolyolefin
The invention provides a functionalized polyolefin composite diaphragm and a preparation method and an application thereof. The functionalized polyolefin composite diaphragm disclosed by the inventionis composed of carbon nanotubes, lithium salt, inorganic nano silicon dioxide and polyolefin components. The preparation method comprises the following steps of mixing solution of binder and the functionalized carbon nanotubes with the nano silicon dioxide to obtain coating solution, putting a polyolefin diaphragm into ethanol solution of lithium salt to obtain a lithium salt modified polyolefindiaphragm, then uniformly coating the lithium salt modified polyolefin diaphragm with the coating liquid. The method is advantaged in that the prepared diaphragm has advantages of excellent mechanicalstrength, high stability, high active surface area, good electrolyte wettability, excellent lithium ion conduction capability and excellent electrochemical performance, and can be well applied to thefield of lithium ion batteries.
Owner:NORTHEAST NORMAL UNIVERSITY
Positive pole piece and solid-state battery comprising same
PendingCN113871709AImprove interface impedancePromote circulationSolid electrolytesSecondary cellsSolid state electrolytePolymer science
The invention provides a positive pole piece and a solid-state battery comprising the same. The positive pole piece comprises a solid electrolyte, the solid electrolyte comprises a polymer, the polymer comprises a structural unit from an olefin compound containing a substituted or unsubstituted ureido group, and the olefin compound further comprises at least one cyclic group. According to the positive pole piece disclosed by the invention, the composition of the polymer in the positive pole piece is limited, so that the interface impedance between the positive pole piece and the solid electrolyte can be effectively improved.
Owner:ZHUHAI COSMX BATTERY CO LTD
A preparation method of solid electrolyte with surface coating and solid electrolyte battery
ActiveCN111106380BGuaranteed conductivityImprove interface impedanceSecondary cellsElectrolytesSolid state electrolyteElectrolytic agent
Owner:SOUTH CHINA NORMAL UNIVERSITY
Solid-state battery with low interface impedance, and preparation method thereof
PendingCN112786890AImprove electrochemical performanceImproved interface contactElectrode rolling/calenderingSolid electrolytesSolid-state batteryElectrical battery
The invention discloses a solid-state battery with low interface impedance, and a preparation method thereof, and relates to the technical field of solid-state batteries. The solid-state battery is prepared by laminating or winding a positive plate with a coating on at least one side and a negative plate with a coating on at least one side together, laminating the coating surfaces, adopting hot pressing and then cold pressing to mutually fuse the coatings on the positive plate and the negative plate, and cooling and curing are performed to form a thermoplastic organic / inorganic electrolyte coating. The positive plate with the coating and the negative plate with the coating are obtained by respectively coating thermoplastic organic / inorganic electrolyte slurry on the composite positive plate and the composite negative plate and then drying; and the composite positive plate and the composite negative plate are obtained by adding an inorganic solid electrolyte, a lithium salt, a conductive agent, a binder and an active substance into a solvent to respectively prepare positive slurry and negative slurry, coating a current collector with the positive slurry and the negative slurry, curing and rolling. The ion interface impedance is effectively reduced, the electrochemical performance of the battery is improved, and industrialization is easy to realize.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Additive for lithium ion battery electrolyte, electrolyte and lithium ion battery
PendingCN114784374AImprove low temperature performanceIncrease migration rateSecondary cellsElectrolytic agentAlkane
The invention provides an additive for a lithium ion battery electrolyte, the electrolyte and a lithium ion battery, the additive comprises a first additive and a second additive, the first additive is a compound with a structural formula as shown in a formula I, and the second additive is an unsaturated alkane compound comprising at least two silicon-oxygen structures. Compared with the existing electrolyte additive, the additive provided by the invention can generate a stable and low-impedance interfacial film through the combined action of the first additive and the second additive on the surfaces of the positive electrode and the negative electrode respectively, can improve the hot box performance and the low-temperature performance of the lithium ion battery, and simultaneously considers the cycle performance and the storage performance.
Owner:HUIZHOU LIWINON NEW ENERGY TECH CO LTD
A solid-state battery with controlled lithium dendrite growth
ActiveCN111769331BAvoid punctureImprove interface impedanceFinal product manufactureElectrolytesSolid state electrolyteMetallic lithium
The invention discloses a preparation method and a battery of a solid electrolyte for controlling the orderly growth of lithium dendrites. Lamination with double-sided conductive adhesive, on the one hand, can control the growth direction of lithium dendrites in an orderly manner in the gap between the solid electrolyte and the metal lithium bonding surface, so that lithium dendrites can grow oppositely in the gap and avoid lithium dendrites. Piercing the solid electrolyte, on the other hand, the carbon coating can improve the interfacial impedance between the solid electrolyte and the cathode material and improve the conduction efficiency of lithium ions.
Owner:WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
A kind of high safety solid state electrolyte and its preparation method and application
ActiveCN111969245BEasy to makePreparation non-toxicSolid electrolytesLi-accumulatorsSolid state electrolyteAll solid state
The invention relates to a high-safe solid state electrolyte, a preparation method thereof and an application in lithium secondary batteries. The solid electrolyte precursor solution includes a lithium salt, an isocyanate-containing compound and a polymer monomer containing a hydroxyl group. The solid electrolyte is obtained by polymerization of the precursor solution, and the polymerization temperature range is 20-80°C. The solid electrolyte precursor solution also includes one or more of plasticizers, active monomers, initiators and catalysts. The solid electrolyte contains polymerizable groups, which can undergo a polymerization reaction at a temperature higher than 100°C to form a polymer with a cross-linked network structure, so that the lithium battery does not have an internal short circuit under extreme high temperature conditions such as thermal abuse, and improves the lithium battery. Battery safety performance.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
Gel composite positive electrode sheet, preparation method thereof, and method for preparing all-solid-state lithium battery
ActiveCN107591536BImprove performanceImprove interface impedanceElectrode manufacturing processesNon-aqueous electrolyte accumulator electrodesAll solid stateElectrolytic agent
Owner:QINGTAO KUNSHAN ENERGY DEV CO LTD
Solid electrolyte membrane, preparation method and battery
ActiveCN112310472BThe overall impact on transmission performance is smallImprove antioxidant capacitySolid electrolytesSecondary cellsSolid state electrolytePolyethylene oxide
The invention provides a solid electrolyte membrane, its preparation method and battery containing it. The solid electrolyte membrane includes a base film and a first polyethylene oxide film laminated on one surface of the base film, and only the surface of the first polyethylene oxide film towards the outside includes -C 2 h 4‑x f x O‑structure, where x is an integer from 1‑4. The present invention improves the oxidation resistance of the electrolyte membrane and improves the battery life by performing fluorination treatment on the surface of the PEO membrane on the premise that the overall influence on the lithium ion transmission performance of the membrane is minimal; at the same time, the fluorination layer has a strong The bonding effect can improve the interface impedance of the electrolyte membrane-electrode sheet and improve the cycle performance of the battery.
Owner:CHINA AVIATION LITHIUM BATTERY RES INST CO LTD
High-optical-absorption carbon nanomaterial and preparation method thereof
ActiveCN113582162AImprove optical absorptionImprove interface impedanceNano-carbonRadio frequencyHeat energy
The invention belongs to the field of optical absorption, and discloses a high-optical-absorption carbon nanomaterial which comprises carbon black and carbon nanowalls which grow on the surface of the carbon black through a chemical vapor deposition method and have light trapping capacity, and light absorption is achieved through gap structures between the walls. A radio frequency plasma enhanced chemical vapor deposition process is adopted, a mode of increasing plasma energy density by using inert gas is adopted, chemical bonds of carbon source gas are opened under the action of reducing gas hydrogen, a vertically arranged carbon nano wall is constructed on the surface of carbon black through the processes of nucleation, migration, orientation, growth and the like, the effective refractive index is close to 1, the material has good interface impedance matching, incident light penetrates through the surface of the material to enter clearance spaces of walls in an almost non-reflection mode and is finally absorbed and converted into heat energy through multiple times of reflection between the walls, and efficient optical absorption in ultraviolet-visible light wave bands is achieved under the combined action of the physical mechanisms.
Owner:西安应用光学研究所
Lithium ion battery electrolyte and lithium ion battery
ActiveCN114171795AReduce interface impedanceImprove interface impedanceSecondary cells servicing/maintenanceOrganic electrolytesElectrolytic agentOrganic solvent
The invention provides a lithium ion battery electrolyte and a lithium ion battery, the lithium ion battery electrolyte comprises a lithium salt, an organic solvent, a first additive and a second additive, the first additive has a structural formula as shown in formula I; the second additive has a structural formula as shown in a formula II; the two additives have a synergistic effect and generate stable and low-impedance interfacial films on the surfaces of a positive electrode and a negative electrode respectively, so that the hot box performance and the low-temperature performance of the battery are improved, and meanwhile, the cycle performance and the storage performance of the battery are both improved.
Owner:HUIZHOU LIWINON NEW ENERGY TECH CO LTD
A functionalized polyolefin composite diaphragm and its preparation method and application
ActiveCN111725466BImprove thermal stabilityGood electrical propertiesMaterial nanotechnologyCell component detailsElectrolytic agentPolymer science
The invention provides a functionalized polyolefin composite diaphragm and its preparation method and application. The functionalized polyolefin composite diaphragm of the present invention is composed of carbon nanotubes, lithium salts, inorganic nano-silicon dioxide and polyolefin components. The invention provides The preparation method of the composite separator is as follows: the binder and the solution of functionalized carbon nanotubes are mixed with nano-silica to obtain a coating solution, and then the polyolefin separator is placed in an ethanol solution of lithium salt to obtain a lithium salt-modified polyolefin membrane. Olefin separator, and then the coating solution is evenly coated on the lithium salt modified polyolefin separator, and then after vacuum drying, functionalized carbon nanotubes and lithium salt coated polyolefin separator are obtained. The prepared separator has excellent mechanical properties Strength, high stability, high active surface area, good electrolyte wettability, excellent lithium ion conductivity and electrochemical performance, can be well used in the field of lithium ion batteries.
Owner:NORTHEAST NORMAL UNIVERSITY
A kind of preparation method of solid electrolyte
ActiveCN112242556BReduce bindingImprove transmission performanceSolid electrolytesFinal product manufactureSolid state electrolyteAll solid state
The application provides a method for preparing a solid electrolyte, comprising: dispersing a lithium precursor and a central atom ligand in an organic solvent to form a reaction mixture; dispersing a borate ester in an organic solvent to form a modified solution; The initial reaction mixture is mixed with the modified solution, and dried to obtain an initial product; the initial product is ground, cold-pressed, and heat-treated to obtain a solid electrolyte. In the preparation method provided in this application, the sulfide solid electrolyte is modified with boric acid ester as the doping raw material, and a B and O co-doped sulfide solid electrolyte can be obtained. During the doping modification process , to realize the sufficient mixing between the sulfide electrolyte raw material and the borate; and the borate is completely decomposed at the phase-forming temperature of the sulfide electrolyte, reducing the introduction of impurities or reactant residues, and the prepared sulfide solid electrolyte The ionic conductivity of the battery has been significantly improved, which is also conducive to the energy density of the all-solid-state battery.
Owner:CONTEMPORARY AMPEREX TECH CO
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