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30results about How to "Improve ion conduction ability" patented technology
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Organic gel electrolyte, application, sodium-based double-ion organic solid-state battery and preparation method thereof
InactiveCN108183257AImprove electronic conductivityHigh ion conductivitySecondary cellsOrganic electrolytesMetal alloySolvent
The invention discloses organic gel electrolyte, application, a sodium-based double-ion organic solid-state battery and a preparation method thereof and relates to the field of electrochemical energystorage devices. The organic gel electrolyte is prepared from electrolyte sodium salt, a non-aqueous solvent and an organic polymer. The sodium-based double-ion organic solid-state battery comprises anegative electrode, a positive electrode, a diaphragm and the organic gel electrolyte; the negative electrode can be sodium ion alloyed metal, a metal alloy or a metal compound; the positive electrode comprises a positive electrode current collector and a positive electrode material; an active substance of the positive electrode material is a laminar material which can be used for reversibly embedding and disembedding sodium salt anions. According to the organic gel electrolyte disclosed by the invention, the problems that organic electrolyte is easy to volatilize, combust and explode, a sodium ion solid-state battery cannot consider ion conducting performance and electrical conductivity at the same time, and the safety performance is not good at high temperature are alleviated. The organic gel electrolyte disclosed by the invention has very good ion conducting performance and electrical conductivity and an electrode piece powdering problem caused by the fact that volume expansion iscaused by alloying can be alleviated; the battery has good circulating stability and safety performance.
Owner:SHENZHEN INST OF ADVANCED TECH
Electrochemical energy storage device
InactiveCN105742712AAvoid the problem of difficult entry into the shellImprove long-term cycle performanceNatural rubber adhesivesFinal product manufactureHigh rateDrop tests
The invention provides an electrochemical energy storage device. The electrochemical energy storage device comprises a battery core, an electrolyte and a package shell and also comprises a glue material, wherein the glue material is arranged between the battery core and the package shell and comprises a viscous layer and a protection layer, the viscous layer is directly or indirectly pasted on the outer surface of the battery core, one surface, far away from the battery core, of the viscous layer is an adhesive surface, the protection layer is arranged on the adhesive surface of the viscous layer and is completely or partially dissolved or swelled and dispersed in the electrolyte so that the adhesive surface of the viscous layer is exposed and the battery core and the package shell are bonded by the viscous layer, the protection layer is a polar molecule, and the polar molecule comprises one or more of -F, -CO-NH-, -NH-CO-NH- and -NH-CO-O-. By the electrochemical energy storage device, the battery core and the package shell can be fixedly connected, the various problems during the drop test process are solved, the problem that the battery core is difficult to enter the shell due to viscosity of the two surfaces of the glue material also can be prevented, and meanwhile, the electrochemical energy storage device has high cycle performance and high-rate charging-discharging performance.
Owner:DONGGUAN AMPEREX TECH +1
Multi-component composite high-first-effect lithium battery negative electrode material and preparation method thereof
ActiveCN111342030AImprove Coulombic efficiency and cycle performanceEasy to prepareSecondary cellsNegative electrodesElectrically conductiveMagnesium silicate
The invention relates to a multi-component composite high-first-effect lithium battery negative electrode material and a preparation method thereof. The negative electrode material forms a SiOx-lithium silicate-magnesium silicate multi-component composite system through co-doping of Li and Mg. The negative electrode material comprises silicon compound particles and a conductive layer coating the surfaces of the silicon compound particles, and further comprises lithium silicate and magnesium silicate, and the molar ratio of lithium atoms in the lithium silicate to magnesium atoms in the magnesium silicate is 0.01: 1 to 100: 1. The characteristics of high ionic conductivity of lithium silicate and high bonding strength of magnesium silicate are combined, the initial coulombic efficiency of the material is further improved, and meanwhile the cycle life is prolonged.
Owner:LANXI ZHIDE ADVANCED MATERIALS CO LTD
Prussian blue positive pole material and preparation method thereof, and electrochemical energy storage device
ActiveCN109698345AImprove the first discharge capacityReduce spreadCell electrodesSecondary cellsPhysical chemistryPrussian blue
The invention provides a prussian blue positive pole material and a preparation method thereof, and an electrochemical energy storage device. The molecular formula of the positive pole material is AxMc[M'(CN)6]y, wherein the A is one or more of H<+>, Li<+>, Na<+>, K<+> and NH4<+>, the M is transition metal, and M' is also the transition metal, 0 < x <= 2, 0 < y < 1, and 0 < c <= 1. The positive pole material has a porous structure and a high specific surface area, so that the diffusion and transmission path of ions and electrons can be obviously shortened, both the ion and electron conductiveproperties of the electrochemical energy storage device can be enhanced, and therefore, the cycle performance and rate performance of the electrochemical energy storage device can be improved; and thecontact with a conductive agent can be also increased, the electron conductive properties of the electrochemical energy storage device can be further enhanced, and the cycle performance and rate performance can be further improved as well.
Owner:CONTEMPORARY AMPEREX TECH CO
Positive electrode active material, positive electrode plate and sodium ion battery
PendingCN111435741AHigh charge and discharge capacityImprove cycle performanceSecondary cellsPositive electrodesPhysical chemistrySodium-ion battery
The invention discloses a positive electrode active material, a positive electrode plate and a sodium ion battery. The molecular formula of the positive electrode active material is Na<1-x>Cu<h>Fe<k>Mn<1>M<m>O<2y>, in the molecular formula, m is a transition metal site doping element, M is one or more of Li, Be, B, Mg, Al, K, Ca, Ti, Co, Ni, Zn, Ga, Sr, Y, Nb, Mo, In, Sn and Ba, 0<x<=0.33, 0<h<=0.24, 0<=k<=0.32, 0<l <=0.68, 0<=m<0.1, h+k+l+m=1 and 0<=y<0.2. The water content of the positive electrode active material is 6000 ppm or less. By adopting the positive electrode active material provided by the invention, the sodium ion battery has relatively high initial capacity, safety performance and cycle performance at the same time.
Owner:CONTEMPORARY AMPEREX TECH CO
Binder for lithium ion battery separator coating and preparation method of binder
ActiveCN108949074AImprove heat resistanceReduce moisture contentNitrile polymer adhesivesAcid polymer adhesivesIonEmulsion
Owner:珠海辰玉新材料科技有限公司
Multi-element gradient composite high-first-effect lithium battery negative electrode material and preparation method thereof
ActiveCN111342031AImprove the first Coulombic efficiencyImprove ion conduction abilityCell electrodesLi-accumulatorsCarbon coatingDischarge efficiency
The invention relates to a multi-element gradient composite high-first-effect lithium battery negative electrode material and a preparation method thereof. The negative electrode material is of a multi-layer core-shell structure, and comprises an inner core, a buffer layer and an outer layer. The inner core and the buffer layer of the negative electrode material are silicon-oxygen compounds, and the outer layer is a carbon coating layer. The inner core and the buffer layer further contain lithium salt and magnesium salt, and the concentration of the magnesium salt is increased progressively from the inner core to the buffer layer to form gradient distribution. There is more lithium salt in the core of the negative electrode material, so that a large amount of active oxygen can be consumed,the initial coulombic efficiency of the material is effectively improved, and meanwhile, the ion conductivity of the material is improved. There is more magnesium silicate in the buffer layer, so that the initial charge-discharge efficiency of the material is further improved, meanwhile, the magnesium silicate forms a high-strength protective layer, the structural stability of the material is enhanced, and the cycle performance of the material is improved.
Owner:LANXI ZHIDE ADVANCED MATERIALS CO LTD
Positive electrode active material, positive electrode plate and sodium ion battery
InactiveCN111435742AImprove ion conduction abilityImprove conductivityElectrode thermal treatmentSecondary cellsPhysicsComposite material
The invention discloses a positive electrode active material, a positive electrode plate and a sodium ion battery. The molecular formula of the positive electrode active material is Na <2+x>CuhMnkMlO<7-y>, wherein in the molecular formula, M is a transition metal site doped element, M is one or more of Li, B, Mg, Al, K, Ca, Ti, V, Cr, Fe, Co, Ni, Zn, Ga, Sr, Y, Nb, Mo, Sn, Ba and W, x is greater than or equal to 0 and less than or equal to 0.5, h is greater than or equal to 0.1 and less than or equal to 2, 1<=k<=3, 0<=l<=0.5, 0<=y<=1, 2<=h+k+l<=3.5, and 0.57<=(2+x) / (h+k+l)<=0.9. The positive electrode active material provided by the invention can give consideration to relatively high initial capacity, rate capability and cycle performance at the same time.
Owner:CONTEMPORARY AMPEREX TECH CO
Electrode material of nanometer porous film capacitor and preparation method thereof
InactiveCN106098415AMaintain porous structureImprove conductivityHybrid capacitor electrodesHybrid/EDL manufactureChemical platingOxygen
The invention provides an electrode material of a nanometer porous film capacitor and a preparation method thereof. The method comprises the following steps of: taking nanometer porous gold as a substrate material, putting the nanometer porous gold into a plating solution with nickel nitrate as a main component, and loading nickel on a nanometer porous gold surface by using a chemical plating method; and keeping the nanometer porous gold loaded with the nickel in the air for a certain time. The nanometer porous gold is taken as a substrate, and the metal Ni is modified on the surface of the nanometer porous gold by the interface chemical plating method. The Ni is contacted with oxygen in the air to form NiO, and a nanometer porous nickel oxide film material is obtained. SEM and EDS tests show that the prepared NiO material keeps the porous structure of the substrate and improves the electrical conductivity and ion conductivity of the electrode material. The prepared porous nickel oxide is good super capacitor electrode material with exploitation potential.
Owner:YILI NORMAL UNIV
Silicon-carbon composite material for secondary lithium battery and preparation method thereof
PendingCN113823772AAvoid breakingImprove cycle performanceSecondary cellsNegative electrodesCarbon compositesElectrolytic agent
The invention discloses a silicon-carbon composite material for a secondary lithium battery and a preparation method thereof. The silicon-carbon composite material for the secondary lithium battery comprises an inner core containing a silicon-based material, a first coating layer and a second coating layer, wherein the first coating layer is a conducting layer, the second coating layer is an ion conducting layer, and the first coating layer and the second coating layer are not sequentially defined. According to the silicon-carbon composite material provided by the invention, the coating layer is the composite material, and the electric conduction (or ion conduction) capability of a base material and the reinforcing and toughening properties of a reinforcing phase are combined, so that the material has very strong anti-expansion capability. In the secondary battery, the coating layer which is not easy to crack means fewer new surfaces, so that the electrolyte consumption is reduced, and the cycle performance of the battery is improved. In addition, the preparation method is simple, easy to implement and suitable for large-scale industrial production.
Owner:LANXI ZHIDE ADVANCED MATERIALS CO LTD
Negative electrode, preparation method thereof, and lithium ion battery using negative electrode
InactiveCN112072091AMaintain or improve processabilityImprove ion conduction abilityElectrode rolling/calenderingSecondary cellsLithium-ion batteryBattery cell
The invention discloses a negative electrode, a preparation method thereof and a lithium ion battery using the negative electrode. In the application, the negative electrode comprises a current collector and a negative electrode active material layer on the current collector, and the negative electrode active material layer comprises a binder; a conductive agent; a negative electrode active material; and an electrode thickening agent, wherein the electrode thickening agent comprises deionized water; a first polymer, and a second polymer; wherein both the first polymer and the second polymer are cellulose ethers or salts thereof, and the average degree of substitution of the first polymer is greater than the average degree of substitution of the second polymer, so that the electrode processability can be maintained or improved while the ion conductivity is improved.
Owner:ENVISION DYNAMICS TECH (JIANGSU) CO LTD +1
Boron nitride nanotube/silicon/carbon nanotube composite material and preparation and application
ActiveCN107863505AImprove electronic conductivityImprove ionic conductivityCell electrodesSecondary cellsBoron nitrideSilicon particle
The invention discloses a boron nitride nanotube / silicon / carbon nanotube composite material. The composite material comprises a silicon material, boron nitride nanotubes and carbon nanotubes, whereinthe content of the silicon material is 10 wt% to 90 wt%, and the sum of the content of the boron nitride nanotubes and the content of the carbon nanotubes is 10 wt% to 90 wt%. The invention also discloses a preparation method of the boron nitride nanotube / silicon / carbon nanotube composite material and application in the preparation of a lithium ion battery negative electrode material. In the invention, due to the fact that the boron nitride nanotubes are high in high temperature resistance and oxidation resistance, the boron nitride nanotubes can serve as structural support, and simultaneouslya part of nanometer silicon can be embedded into the interiors of the modified boron nitride nanotubes, the volume change of silicon particles in the charging and discharging process is relieved, thecarbon nanotubes are high in electron electric conductivity and ion electric conductivity, and the boron nitride nanotube / silicon / carbon nanotube composite material can develop excellent electrochemical performance of a silicon-based negative electrode while overcoming the disadvantages of the silicon-based negative electrode material, so that the composite material can be widely applied to lithium ion battery negative electrode materials.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Composite solid electrolyte and preparation method thereof
PendingCN114388884AImprove rheologyReduce surface tensionFinal product manufactureElectrolyte accumulators manufacturePolymeric surfacePlasticizer
The invention relates to a composite solid electrolyte and a preparation method thereof, the composite solid electrolyte is composed of fine Li6. 75La3Zr1. 75Ta0. 25O12 ceramic powder, a PVDF polymer substrate, a plasticizer, a dispersant and a lithium salt, after the fine Li6. 75La3Zr1. 75Ta0. 25O12 ceramic powder, the PVDF polymer substrate, the plasticizer, the dispersant and the lithium salt are fully stirred and dissolved in an organic solvent, the dispersant is attached to the surface of a PVDF polymer in a linear or planar manner, and the lithium salt is added into the PVDF polymer substrate. The plasticizer and the fine Li6. 75La3Zr1. 75Ta0. 25O12 ceramic powder are fully inserted into the PVDF polymer substrate, so that the PVDF polymer substrate and the plasticizer are promoted to be mixed to generate blending modification, and a point, line, surface and layer multi-dimensional mixed insertion system structure which takes the PVDF polymer substrate as a continuous phase and takes a dispersing agent and the plasticizer as dispersed phases and is arranged in a staggered manner is formed. The preparation method has the advantages that operation is easy, synthesis conditions are mild, large-scale production can be achieved, and the obtained composite electrolyte has good flexibility and high room-temperature ionic conductivity.
Owner:YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
A kind of preparation method of high stability artificial solid electrolyte interface membrane material
ActiveCN111029523BHigh curie temperatureImprove cycle performanceSecondary cellsElectrolyte layer coatingFilm materialMaterials science
The invention relates to a preparation method of a high-stability artificial solid electrolyte interface film material, belonging to the technical field of lithium batteries. The technical scheme of the present invention adopts the ion beam deposition method to improve the problems of large leakage current, large dielectric loss and easy breakdown during pulse polarization when the traditional sol-gel is used to prepare lithium tantalate composite thin film materials. In order to reduce the dielectric loss and Leakage current, enhance the ability to resist breakdown, through the ion beam enhanced deposition method lithium tantalate thin film, form a complex film structure with lithium ions, prevent its precipitation, and slow down the "shuttle effect", while the deposited thin film composite prepared by the present invention It is non-corrosive and compatible with all battery components. The purification film is formed by depositing the dense structure of the film itself. This compound has high ion conductivity, which improves the cycle performance of lithium batteries and improves the use of materials. life.
Owner:安徽沃奥动力科技有限公司
Conductive composite material, preparation method thereof and application of conductive composite material in lithium ion battery electrode
ActiveCN112968154AImprove conductivityHigh ion conductivityCell electrodesSecondary cells servicing/maintenanceSpinningConductive polymer
The invention discloses a conductive composite material, a preparation method thereof and application of the conductive composite material in a lithium ion battery electrode. The composite material comprises a hollow conductive polymer tube and a conductive agent, the conductive agent is uniformly dispersed in the conductive polymer tube in an incomplete filling manner, and the inner diameter of the conductive polymer tube is 100-4000 nm. The preparation method comprises the following steps: carrying out electrostatic spinning on an electrostatic spinning solution containing a high-molecular polymer and a conductive agent to obtain nanofibers, dispersing the nanofibers into a hydrochloric acid solution containing a conductive polymer monomer, adding an initiator to carry out polymerization reaction to obtain the nanofibers coated with the conductive polymer on the surface, finally adding the nanofibers into an organic solvent, and fully dissolving the high-molecular polymer in the nanofibers to obtain the conductive composite material. The conductive composite material has good conductivity and ion conductivity at the same time, and when the conductive composite material is used as a conductive agent in an electrode, the polarization phenomenon under the large-current charging and discharging condition can be effectively eliminated, battery expansion is relieved, and the rate performance and the cycle performance are improved.
Owner:WUHAN UNIV
Conductive agent and preparation method thereof, electrode and secondary battery
ActiveCN112886009BImprove electronic conductivityHigh ion conductivityMaterial nanotechnologyCell electrodesCarbon nanotubeGraphite
Owner:EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD
A kind of nanoporous film capacitor electrode material and preparation method thereof
InactiveCN106098415BMaintain porous structureImprove conductivityHybrid capacitor electrodesHybrid/EDL manufactureChemical platingFilm material
The invention provides an electrode material of a nanometer porous film capacitor and a preparation method thereof. The method comprises the following steps of: taking nanometer porous gold as a substrate material, putting the nanometer porous gold into a plating solution with nickel nitrate as a main component, and loading nickel on a nanometer porous gold surface by using a chemical plating method; and keeping the nanometer porous gold loaded with the nickel in the air for a certain time. The nanometer porous gold is taken as a substrate, and the metal Ni is modified on the surface of the nanometer porous gold by the interface chemical plating method. The Ni is contacted with oxygen in the air to form NiO, and a nanometer porous nickel oxide film material is obtained. SEM and EDS tests show that the prepared NiO material keeps the porous structure of the substrate and improves the electrical conductivity and ion conductivity of the electrode material. The prepared porous nickel oxide is good super capacitor electrode material with exploitation potential.
Owner:YILI NORMAL UNIV
Prussian blue cathode material, preparation method thereof, and electrochemical energy storage device
ActiveCN109698345BImprove the first discharge capacityReduce spreadCell electrodesSecondary cellsPhysical chemistryEngineering
The present application provides a Prussian blue cathode material, a preparation method thereof, and an electrochemical energy storage device. The molecular formula of the Prussian blue cathode material is A x M c [M'(CN) 6 ] y , where A is H + , Li + , Na + , K + , NH 4 + One or more of them, M is a transition metal, M' is a transition metal, 0
Owner:CONTEMPORARY AMPEREX TECH CO
A kind of preparation method of lithium ion secondary battery cathode material
Owner:SHENZHEN BAINA NEW ENERGY TECH
A kind of conductive composite material and its preparation method and application in lithium ion battery electrode
ActiveCN112968154BImprove conductivityHigh ion conductivityCell electrodesSecondary cells servicing/maintenanceConductive polymerConductive materials
The invention discloses a conductive composite material, a preparation method thereof and an application in a lithium ion battery electrode. The composite material includes a hollow conductive polymer tube and a conductive material, the conductive material is uniformly dispersed inside the conductive polymer tube in an incomplete filling manner, and the inner diameter of the conductive polymer tube is 100-4000 nm. Its preparation: electrospinning an electrospinning solution containing a high molecular polymer and a conductive material to obtain nanofibers, then dispersing into a hydrochloric acid solution containing a conductive polymer monomer, adding an initiator to carry out a polymerization reaction, and obtaining a surface coating The nanofibers coated with the conductive polymer are finally added into an organic solvent to fully dissolve the high molecular polymers in the nanofibers, so as to obtain a conductive composite material. The conductive composite material has good electrical conductivity and ion-conducting properties at the same time. When used as a conductive agent in electrodes, it can effectively eliminate the polarization phenomenon under high current charge and discharge conditions, relieve battery swelling, and improve rate performance and cycle performance.
Owner:WUHAN UNIV
A kind of lanthanum lithium titanate-lithium titanate coated nickel cobalt lithium aluminate positive electrode material and preparation method thereof
ActiveCN109119621BReduce alkalinityStable surface chemistrySecondary cellsPositive electrodesActive agentLithium aluminate
Owner:乳源东阳光新能源材料有限公司 +1
A kind of gel polymer electrolyte diaphragm, lithium ion battery and preparation method thereof
ActiveCN109037767BImprove adhesionImprove liquid absorption capacitySecondary cellsElectrolyte immobilisation/gelificationElectrolytic agentPolymer electrolytes
The invention provides a gel polymer electrolyte diaphragm, a lithium ion battery and a preparation method thereof. The preparation method of the diaphragm comprises the following steps: dissolving apolymer micro powder in a first solvent to obtain a polymer solution; dissolving the stabilizer in the second solvent to obtain a stabilizer solution; Mixing the high molecular polymer solution and the stabilizer solution and diluting to prepare polymer electrolyte slurry; The polymer electrolyte slurry is coated on at least one surface of a diaphragm substrate, and dried to form a polymer electrolyte coating to obtain a gel polymer electrolyte diaphragm. The gel polymer electrolyte diaphragm made of the aqueous polymer has the characteristics of high adhesion, environmental protection, strongliquid absorption and high ionic conductivity, and can greatly save cost. The lithium ion battery is prepared by utilizing the separator of the invention, and polymer gel is formed through a gelatinization process, and the electrolyte is tightly locked in the polymer gel, and the lithium ion is used as a channel for directional movement.
Owner:SHANGHAI ENERGY NEW MATERIALS TECH CO LTD
A kind of binder for lithium ion battery separator coating and preparation method
ActiveCN108949074BImprove heat resistanceImprove ion conduction abilityNitrile polymer adhesivesAcid polymer adhesivesPhysical chemistryAcrylonitrile
The invention provides a binder for a lithium-ion battery separator coating and a preparation method thereof. The binder for a lithium-ion battery separator coating mainly includes the following components in parts by weight: 6-33 parts of acrylonitrile 16-30 parts of acrylic acid; 1-5 parts of soft monomer; 0.1-5 parts of emulsifier, 0.1-2 parts of initiator, 0.1-5 parts of lithium salt, 30-70 parts of ultrapure water; its preparation method is in emulsification Add ultrapure water and emulsifier into the tank, stir evenly, add all the monomers, and get a pre-emulsion after stirring; add the remaining ultrapure water and pre-emulsion into the reaction kettle, stir and heat up to 60-100°C, add dropwise Initiator aqueous solution, react, keep constant temperature for 4-8h, cool to normal temperature, adjust pH value. The application solves the problem that the diaphragm coating of the lithium-ion battery is not resistant to high temperature and the water content is too high, improves the conductivity of ions, and improves the safety performance of the battery.
Owner:珠海辰玉新材料科技有限公司
A ternary positive electrode material coated with lithium phosphate and conductive carbon material and its preparation method and application
ActiveCN110098387BImprove conductivityImprove ion conduction abilityCell electrodesElectrolytic agentPhosphoric acid
The invention discloses a ternary positive electrode material coated with lithium phosphate and a conductive carbon material, comprising a ternary positive electrode material, a conductive carbon material adsorbed and inserted into the surface of the ternary positive electrode material, and lithium phosphate coated on the surface of the ternary positive electrode material layer, the preparation method of which is: dissolving phosphoric acid in a solvent, ultrasonic dispersion at room temperature and continuous stirring, then adding the mixed powder of ternary positive electrode material and conductive carbon material to the solution being stirred, and continuously stirring and reacting; finally, the above-mentioned The mixed solution is heated to remove the solvent, and a ternary positive electrode material coated with lithium phosphate and conductive carbon material is obtained. The present invention covers the surface layer of the conductive carbon material to form a uniform and continuous complete coating layer, which can effectively reduce the internal resistance at the interface of the material and improve the electronic conductivity of the material to a certain extent; at the same time, phosphoric acid is generated by chemical method Lithium provides lithium ion channels for the transmission of lithium ions, thereby improving the ionic conductivity of the material; moreover, the coating layer can effectively prevent the electrolyte from corroding the material, thereby greatly improving the cycle stability of the material.
Owner:GUANGDONG UNIV OF TECH
A boron nitride nanotube/silicon/carbon nanotube composite material and its preparation and application
ActiveCN107863505BImprove electronic conductivityImprove ionic conductivityCell electrodesSecondary cellsBoron nitrideSilicon particle
The invention discloses a boron nitride nanotube / silicon / carbon nanotube composite material, which comprises a silicon material, a boron nitride nanotube and a carbon nanotube, wherein the content of the silicon material is 10-90 wt%, and the boron nitride nanotube The sum of the content of carbon nanotubes and carbon nanotubes is 10-90wt%; the invention also discloses the preparation method of the boron nitride nanotube / silicon / carbon nanotube composite material and its application in the preparation of negative electrode materials for lithium-ion batteries; the invention Among them, due to the good high temperature resistance and oxidation resistance of boron nitride nanotubes, it can be used as a structural support and part of the nano-silicon can be embedded in the modified boron nitride nanotubes to alleviate the volume change of silicon particles during charging and discharging. , while carbon nanotubes have good electronic conductivity and ionic conductivity, the boron nitride nanotube / silicon / carbon nanotube composite material can exert the excellent electrochemical performance of silicon-based negative electrode while overcoming the shortcomings of silicon-based negative electrode materials, It can be widely used in negative electrode materials of lithium ion batteries.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
A multi-component composite high-first-efficiency lithium battery negative electrode material and preparation method thereof
ActiveCN111342030BHigh bonding strengthImprove ion conduction abilitySecondary cellsNegative electrodesPhysical chemistryElectro conductivity
Owner:LANXI ZHIDE ADVANCED MATERIALS CO LTD
Conductive agent and preparation method thereof, electrode and secondary battery
ActiveCN112886009AImprove electronic conductivityHigh ion conductivityMaterial nanotechnologyCell electrodesElectrically conductiveCarbon nanotube
The invention relates to the technical field of lithium ion batteries, and discloses a conductive agent and a preparation method thereof, an electrode material and a secondary battery. The conductive agent provided by the invention comprises sulfonated graphene metal salt and carbon nanotubes, and the sulfonated graphene metal salt and the carbon nanotubes are combined to form a line-plane conductive network. The conductive agent has dual effects of electron conduction and ion conduction, and when the conductive agent is applied to preparation of a battery, electron conduction and ion conduction in the battery can be optimized, and the rate capability, the cycle performance and the low-temperature performance of the secondary battery can be improved.
Owner:EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD
A kind of ternary positive electrode material for lithium ion secondary battery and preparation method thereof
ActiveCN113113575BImprove conductivityImprove ion conduction abilitySecondary cellsPositive electrodesElectrical batteryIonic conductivity
The invention provides a ternary positive electrode material for a lithium ion secondary battery and a preparation method thereof. The method of the invention can improve the electronic conductivity and ionic conductivity of the ternary positive electrode material for a lithium ion secondary battery under low temperature conditions, thereby improving the ternary positive electrode material. Low temperature output characteristics of cathode materials. The preparation method includes the following steps: 1) adding a metal oxide to a ternary precursor A with a median particle size of 3-5 μm and adding a lithium source to obtain a material A; adding a ternary precursor A with a median particle size of 8-12 μm Add a metal oxide to the precursor B and add a lithium source to obtain a material B; sinter to obtain a calcined material A and B; 2) respectively add it to the gelatin aqueous solution, stir and dry to obtain a gel A and a gel B; 3) freeze the The dried gels A and B are calcined to obtain secondary sintered materials A and B coated with conductive carbons of different coating amounts; 4) batch mixing of secondary sintered materials A and B to obtain lithium ion secondary battery III Element cathode material.
Owner:WANHUA CHEM GRP CO LTD
Preparation method of high-stability artificial solid electrolyte interface film material
ActiveCN111029523AHigh curie temperatureImprove cycle performanceSecondary cellsElectrolyte layer coatingComposite filmDielectric loss
The invention relates to a preparation method of a high-stability artificial solid electrolyte interface film material, and belongs to the technical field of lithium batteries. According to the technical scheme, an ion beam deposition method is adopted, the problems of large leakage current, large dielectric loss, easy breakdown in the pulse polarization process and the like are imptobrf when thelithium tantalate composite film material is prepared by the traditional sol-gel method to reduce dielectric loss and leakage current and enhance breakdown resistance, a lithium tantalate film is prepared by an ion beam enhanced deposition method, a complex film-forming structure is formed with the lithium ions to prevent precipitation and slow down the shuttle effect. Meanwhile, the deposition film compound prepared through the method has characteristics of no corrosivity and matching with all the battery components. The passivation film is formed by the compact structure of the deposition film, and the compound has high ionic conductivity so as to improve the cycle performance of the lithium battery and prolong the service life of the material.
Owner:安徽沃奥动力科技有限公司
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