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44 results about "Lithium Iodine Battery" patented technology
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Negative pole material of lithium ion battery, preparation method of material and lithium ion battery
ActiveCN102881881AImprove cycle performanceImprove Capacitive PerformanceCell electrodesTin dioxideElectrical battery
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Method for recovering cobalt lithium metal from waste lithium ion battery of lithium cobalt oxide positive material
ActiveCN104466292AHigh recovery rateShort processWaste accumulators reclaimingProcess efficiency improvementHydrogen SulfateLithium metal
The invention discloses a method for recovering cobalt lithium metal from a waste lithium ion battery of a lithium cobalt oxide positive material. The method comprises the following steps: discharging and disassembling the waste lithium ion battery to obtain a waste positive plate, roasting the waste positive plate, dissolving with water and filtering to obtain waste lithium cobalt oxide powder; mixing the waste lithium cobalt oxide powder and sodium hydrogen sulfate according to a certain proportion and then roasting; leaching the roasting product with water; adding sodium carbonate solution into the solution and then filtering; supplementing a certain quantity of lithium carbonate into filter residue and then performing ball milling, pressing and placing in a resistance furnace to roast to newly obtain the lithium cobalt oxide positive material with good electrochemical performance, wherein the ingredients of the filter liquor are adjusted by using sulfuric acid and the sodium hydrogen sulfate obtained after the crystallization treatment is performed can be reutilized.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
Lithium ion battery electrolyte and lithium ion battery prepared therefrom
InactiveCN108306048AImprove thermal stabilityImprove permeabilitySecondary cellsHigh temperature storageAluminium-ion battery
The invention discloses a lithium ion battery electrolyte and a lithium ion battery prepared therefrom, and belongs to the technical field of lithium ion batteries. The invention aims to solve the problems that due to the accumulation of decomposed substances, the output performance degrades after high temperature storage, and the circulation performance of batteries degrades therefore. The electrolyte is characterized by comprising lithium salts, a non-aqueous organic solvent and an additive. A functional additive is dissolved in the non-aqueous organic solvent. The additive also comprises afunctional additive. The functional additive is composed of an organic substance based on trimethyl silazane and at least one lithium salt of lithium salts with an oxalic acid skeleton, lithium saltswith a phosphoric acid skeleton, and lithium salts with S=O groups. The circulation performance of a lithium ion battery is improved, after high temperature storage, the discharge capacity is well maintained, and the lithium ion battery can be applied to commercial application.
Owner:CAMEL GRP WUHAN OPTICS VALLEY R&D CENT CO LTD
Lithium ion battery
InactiveCN104779413AImprove isotropyLower impedanceCell electrodesElectrolyte accumulators manufactureElectrical batteryCharge discharge
The invention belongs to the technical field of lithium ion batteries and discloses a lithium ion battery. The lithium ion battery comprises a cathode piece, an anode piece, a diaphragm arranged between the cathode piece and anode piece, and an electrolyte; the anode piece comprises an anode active material, an anode conductive agent, a binder and an anode current collector; the anode active material is formed by use of agglomerated secondary artificial graphite particles; the particle D50 of the secondary artificial graphite particles is 21.0+ / -3.0 microns, the specific surface area of the particles is 1.5+ / -0.4m<2> / g, and the compaction density of the particles is 1.65-1.80g / cm<3>; the anode active material is obtained by use of the following steps: preforming coarse crushing on needle coke to form particles having the grain size of 4.5-11.5 microns, and homogeneously coating the particles with a homogeneous coating material in the percentage of 10-40% and agglomerating into secondary particles, and then preforming ultrahigh temperature graphitization at temperature above 3000 DEC. According to the lithium ion battery, rapid charging of the battery can be realized, and excellent low-temperature charge-discharge properties also are achieved, and consequently, the battery is capable of working normally in a low-temperature environment.
Owner:SHENZHEN MEIBAI ELECTRONIC CO LTD
Lithium ion battery
InactiveCN104362346AGuaranteed not to release the filmIncrease energy densityCell electrodesSecondary cellsFiberCarbon fibers
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a lithium ion battery. The lithium ion battery comprises a positive plate, a negative plate, an isolating membrane spaced between the positive plate and the negative plate and electrolyte, wherein the positive plate comprises a positive current collector and a positive active material layer arranged on the surface of the positive current collector; the positive active material layer comprises components in percentage by mass as follows: 98.1%-99.8% of positive active materials, 0.1%-1% of a positive conductive agent and 0.1%-1% of a positive adhesive; and a negative conductive agent comprises at least one of carbon fiber, carbon nano tubes, carbon nanorods and graphene or a mixture of carbon black with at least one of carbon fiber, carbon nano tubes, carbon nanorods and graphene. Compared with the prior art, the energy density of the battery and the high-power charge and discharge characteristics of the battery are improved under the premise that a diaphragm isn't separated.
Owner:DONGGUAN AMPEREX TECH
Carbon material for lithium ion battery negative electrode and preparation method for carbon material, lithium ion battery negative electrode and lithium ion battery
The invention provides a preparation method for a carbon material for a lithium ion battery negative electrode. The preparation method comprises the steps of performing polymerization on coal liquefaction residue, stabilizing the polymerization product and performing carbonization on the stabilized product. The invention provides the carbon material for the lithium ion battery negative electrode prepared by the method provided by the invention. The invention provides the lithium ion battery negative electrode, wherein the negative electrode contains the carbon material provided by the invention. The invention provides a lithium ion battery, wherein the negative electrode of the lithium ion battery contains the carbon material provided by the invention. According to the preparation method, the coal liquefaction residue is directly taken as the raw material; a thermal polymerization method is adopted without requiring a catalyst; the carbon material for the lithium ion battery negative electrode is prepared by the steps of polymerization, stabilization and carbonization; and therefore, the use of the catalyst is saved, a separating process and an organic solvent or a precipitator required by the separation after polymerization are saved as well.
Owner:CHNA ENERGY INVESTMENT CORP LTD +1
Lithium ion battery employing non-aqueous electrolyte
InactiveCN105977525ALower impedanceImprove low temperature performanceNegative electrodesSecondary cellsSodium-ion batteryLithium-ion battery
Owner:SHENZHEN CAPCHEM TECH CO LTD
Anode material capable of being used for lithium-iodine cell and preparation method thereof
InactiveCN101950806ALow costEasy to prepareLithium organic compoundsCell electrodesMetallic lithiumAll solid state
The invention belongs to the technical field of electrochemistry, and in particular discloses an anode material capable of being used for a lithium-iodine cell and a preparation method thereof. The anode material is prepared by heating, melting and reacting iodine monomer and LiI(3-hydroxypropionitrile)2 (LiI(HPN)2) and recorded as LiI(HPN)2-xI2, wherein x is greater than or equal to 0.1 and less than or equal to 10. A battery is formed by directly contacting the material LiI(HPN)2-xI2 serving as an anode with metal lithium, and the material LiI(HPN)2-xI2 has high discharge performance, particularly the material with x greater than or equal to 0.6. The theoretical specific capacity of the LiI(HPN)2-I2 is 101mAh / g; the theoretical specific capacity of LiI(HPN)2-3I2 is 155mAh / g; and the capacity increases along with increase in proportion of the monomer iodine. The anode material has the advantages of high specific capacity, simple preparation method and low cost and is applicable to full solid-state lithium-iodine batteries.
Owner:FUDAN UNIV
Lithium ion battery electrolyte
ActiveCN108539269ANo degradation in rate performanceNo drop in conductivityLi-accumulatorsOrganic electrolytesOrganic solventInternal resistance
In order to solve the problem that in the prior art, electrolyte cannot simultaneously realize the electrochemical performance such as flame retardant performance and circulation cycle, the inventionprovides lithium ion battery electrolyte. The lithium ion battery electrolyte is prepared from lithium salt, an organic solvent and additives, wherein the additives include a phosphonitrile compound and perfluoro(2-methyl-3-pentanone). The lithium ion battery electrolyte provided by the invention has good cycle performance and flame retardant safety; a lithium ion battery using the electrolyte hasstable cycle performance at normal temperature and 45 DEG C; air expansion cannot occur when the lithium ion battery is stored in a 60-DEG C heat box; the internal resistance is small; good storage performance and cycle performance are maintained.
Owner:NANTONG CAPCHEM ELECTRONICS MATERIALS CO LTD
Electrolyte for lithium ion battery
ActiveCN108232292ASolve the difficulty of taking into account the high temperature cycleSolve the problem of high pressure circulationSecondary cells servicing/maintenanceOrganic electrolytesTriflic acidHigh pressure
The invention discloses an electrolyte for a lithium ion battery. The electrolyte for the lithium ion battery comprises a solvent, lithium salt and an additive, wherein measured by 100 percent of thesum of the mass of the solvent and the additive, the mass fraction of the solvent is 97.5-99.5 percent, and the rest is the additive; the lithium salt has a concentration of 1.0-1.15 mol / L; the additive is trifluoromethylsulfonic acid-3-methyl-1,1'-thionyl diimidazole ionic liquid. Compared with the prior art, the electrolyte disclosed by the invention has the benefits that through adding the trifluoromethylsulfonic acid-3-methyl-1,1'-thionyl diimidazole ionic liquid in a conventional electrolyte, the problems of high temperature circulation and high pressure circulation in a ternary / graphitelithium ion battery are solved, so that the high temperature circulation and the high pressure circulation of an LiNixCoyMnzO2 / graphite-lithium ion battery are improved; meanwhile, the initial electrical performance and the rate performance of the battery are better.
Owner:DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
Electrolyte additive for lithium ion battery
InactiveCN106328995AImprove securityImprove charge and discharge efficiencySecondary cellsElectrical batteryDouble bond
The invention relates to an ionic liquid additive for a lithium ion battery. The ionic liquid additive has an alkali group and an unsaturated double-bond group at the same time, and has multifunctional effects of film-forming promotion, dehydrating, acid restraining, stabilizing and the like. 0.01-5% of the additive is added to the electrolyte for the lithium ion battery; formation of a negative electrode SEI film is promoted while the water content in the electrolyte can be controlled; and consequently, the cycle performance and the safety of the lithium ion battery are improved.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Lithium ion battery electrolyte
InactiveCN108270034ALower impedanceImprove cycle performanceSecondary cellsOrganic solventStructural formula
The invention relates to a pyrazole compound electrolyte additive. The structural formula of the additive is 1R<1>,3R<2>,4R<3>-pyrazole or 1R<1>,4R<2>,5R<3>-pyrazole, wherein each of R<1>, R<2> and R<3> is a linear or branched C1-4 structure. A lithium ion battery electrolyte includes a lithium salt, an organic solvent, the pyrazole compound and other functional additives, and the mass of the pyrazole compound is 0.1-10% of the mass of the lithium battery electrolyte. The pyrazole compound is beneficial for forming an interface film having a certain conductivity on the surface of a positive electrode, and can be used together with other positive electrode film forming additives to reduce the impedance of the surface of a positive electrode, so the safety performance of the lithium ion battery and the cycle performances under a high voltage are improved.
Owner:SUZHOU RUNHE CHEM MATERIAL CO LTD
Lithium ion battery
ActiveCN105449269AImprove cycle performanceIncrease energy densityCell electrodesSecondary cellsPhosphateElectrical battery
The invention is applicable to the field of lithium ion batteries, and provides a lithium ion battery comprising a cathode plate, an anode plate, a membrane and electrolyte, wherein the surface of the cathode plate is coated with cathode slurry including cathode active materials including lithium iron phosphate, ternary material and lithium manganese ferric phosphate; the ternary material is represented by the formula of LiNixCOyMn1-x-yO2, wherein x is less than 1 and more than 0, y is less than 1 and more than 0, and the sum of x and y is less than 1 and more than 0. The mass ratio of the lithium iron phosphate, ternary material and lithium manganese ferric phosphate is (10-60):(10-50):(10-50). The cathode slurry also includes conductive agents which are carbon nanotubes. The lithium ion battery provided by the invention is significantly improved in cycle performance, energy density and safety performance.
Owner:OPTIMUM BATTERY CO LTD
A non-aqueous electrolyte for a lithium ion battery and a lithium ion battery using the electrolyte
ActiveCN109148960AIncrease oxidation voltageImprove stabilitySecondary cellsOrganic electrolytesDecompositionElectrical battery
The invention discloses a non-aqueous electrolyte for lithium ion battery and a lithium ion battery using the electrolyte. A non-aqueous electrolyte for a lithium ion battery comprises a lithium salt,Organic solvents and additives, the lithium salt may be selected from the group consisting of LiPF 6, one or more of LiBF4, LiClO4 and the like, wherein the organic solvent is selected from the groupconsisting of chain carbonate, cyclic carbonate, carboxylic ester and a mixed organic solvent of a fluorinated ether compound represented by the general formula (I), and may further comprise a commonly used additive of a high voltage type. The non-aqueous electrolyte for lithium ion battery is added with fluorinated ether solvent, and the addition of fluorinated ether improves the oxidation decomposition voltage of the organic solvent and improves the working performance of the electrolyte under the condition of high voltage.
Owner:산산어드밴스드머테리얼스(취저우)컴퍼니리미티드
Lithium ion secondary battery electrolyte and preparation method thereof
ActiveCN104218255AFinal product manufactureElectrolyte accumulators manufactureElectrolysisAluminium-ion battery
The invention provides lithium ion secondary battery electrolyte and a preparation method thereof. The lithium ion secondary battery electrolyte comprises (1) 70-90wt% of a carbonate type organic solvent, (2) 8-20wt% of lithium salt and (3) 0.01-10.0wt% of an additive, wherein the additive is an organic compound comprising a group with the following structure described in the specification. The lithium ion secondary battery electrolyte comprises the carbonate solvent used by a lithium ion battery, the lithium salt taken as electrolysis salt, and the additive used for preventing the damage to a solid electrolyte interface (SEI) diaphragm layer so as to prevent the decomposition of the electrolyte caused by gas produced by the damage, so that the battery is prevented from being expanded since the gas is generated in the battery in the use process, and the cycle performance of the lithium ion battery is improved.
Owner:YICHUN JINHUI NEW ENERGY MATERIALS
Lithium ion battery, modified lithium ion battery anode material and preparation method of anode material
InactiveCN107785555AWide range of materialsSimple processElectrode thermal treatmentSecondary cellsAluminium-ion batterySodium-ion battery
The invention belongs to the related technical field of anode materials and discloses a preparation method of the modified lithium ion battery anode material. The method comprises the following steps:(1) mixing a ternary precursor NixCoyMn(1-x-y)(OH)2 with lithium salt in a preset proportion to be ball-milled, and then roasting the mixture at 850 DEG C to obtain a ternary anode material LiNixCoyMn(1-x-y)O2; and (2) mixing the obtained ternary anode material with a nitrogen-containing organic matter and calcining the mixture in a preset atmosphere to obtain the modified lithium ion battery anode material. The invention also relates to the modified lithium ion battery anode material and a lithium ion battery. According to the invention, the rate performance and the cyclic stability of the lithium ion battery are improved, and the process is simple and easy to implement.
Owner:HUAZHONG UNIV OF SCI & TECH
Electrolyte and lithium ion battery
InactiveCN107403956AImprove high temperature storage performanceImproved magnification performanceSecondary cellsOrganic electrolytesHigh temperature storageOrganic solvent
The invention provides electrolyte and a lithium ion battery. The electrolyte contains lithium salt, an organic solvent and an additive, wherein the organic solvent contains a carboxylic ester compound; and the additive contains a dinitrile compound containing a carbon-carbon double bond and a silicon alkyl sulfate compound. By applying the electrolyte to the lithium ion battery, the high-temperature storage performance, high-temperature cycle performance and rate capability of the lithium ion battery can be simultaneously improved.
Owner:NINGDE AMPEREX TECH
Positive electrode material used for lithium-iodine battery
The invention discloses a positive electrode material used for a lithium-iodine battery, and specifically provides a composite material which can be used as a positive electrode active material of the lithium-iodine battery. The composite material comprises polymer high molecules and active material iodine, and one or more kinds of acting force of chemical bonds, hydrogen bonds and Van der Waals' force can be formed between the polymer high molecules and active material iodine. When the composite material is used as the active material for preparing the positive electrode material and applied to the lithium-iodine battery, relatively high coulombic efficiency and excellent cycling stability can be represented.
Owner:ZHEJIANG UNIV
Lithium ion battery
ActiveCN106299507AImprove overcharge resistanceSolve thermal failureCell electrodesSecondary cells charging/dischargingArylHalogen
The invention provides a lithium ion battery. The lithium ion battery comprises a positive pole piece, a negative pole piece, an isolating film spaced between the positive pole piece and the negative pole piece, and an electrolyte solution. A positive electrode film piece also includes a positive electrode additive; the positive electrode additive is lithium carbonate; the electrolyte solution also includes an electrolyte solution additive; the electrolyte solution additive includes flavonoids and has the following chemical formula described in the specification, wherein H at 3, 5, 6, 7, 8, 1', 2', 3', 4' and 5' sites is independently substituted by functional groups substituted by phenolic hydroxyl, hydroxyl, alkyl, alkoxy, carboxyl, amino, aryl or halogen. The lithium ion battery effectively solves the problem of thermal failure of a lithium ion battery caused by side reactions of lithium carbonate in a positive pole piece under a condition of high temperature, and at the same time, the lithium ion battery has relatively good overcharge resistant performance.
Owner:CONTEMPORARY AMPEREX TECH CO
Mechanical conditioning by bead blasting lithium iodine cell case
ActiveUS20160204391A1Undesirable surface contaminationEliminate surface contaminationPrimary cell manufactureSmall-sized cells cases/jacketsLithiumEngineering
Bead blasting the inner, contact surface of an electrochemical cell casing to render the inner surface thereof essentially contamination free and suitable as a current collector is described. The casing is preferably of stainless steel and houses the alkali metal-halogen couple in a case-positive configuration.
Owner:WILSON GREATBATCH LTD
Lithium ion battery
InactiveCN104300172ALow costConsiderable reversible capacityCell electrodesElectrolyte accumulators manufactureElectrical batteryManganese
The invention discloses a lithium ion battery. The lithium ion battery comprises an anode, a cathode and electrolyte, wherein the electrolyte contains a lithium salt and a solvent. The lithium ion battery is characterized in that an active material of the anode is a lithium-rich manganese based solid solution; an active material of the cathode is lithium titanate; the solvent comprises fluoro carbonate and an additive including one or more of fluoro methylsulfolane or a derivative thereof, fluoromethyl-1,3,2-dioxathiolane 2-oxide or a derivative thereof and fluoromethyl ethylene sulfate or a derivative thereof; a general formula of the lithium-rich manganese based solid solution is xLi2MnO3.(1-x)LiMO2, wherein x is greater than 1.2 and smaller than 1.5, M is any one of Ni, Co, Mn, Cr, Ni0.5Mn0.5 and Ni1 / 3Mn1 / 3Co1 / 3; the lithium salt is one or more of LiPF6, LiBF4, LiClO4, LiAsF6, LiBOB, LiCF3SO3; reversible capacity is larger than 250mAh / g, energy density is higher than that of other traditional anode materials, and high-temperature performance is excellent.
Owner:QINGDAO QIANYUN HIGH TECH NEW MATERIAL
Lithium ion battery
ActiveCN110364695AAvoid consumptionExtended service lifePositive electrodesSecondary cells servicing/maintenanceElectrical batterySulfate
The present invention provides a lithium ion battery. The lithium ion battery comprises: a cathode comprising a cathode material, wherein the cathode material comprise particles containing a lithium compound and inorganic compounds arranged at the surfaces of the particles; an anode; an isolating membrane; and an electrolyte comprising ethylene sulfate and nitrile compound. Through combination andcooperative effect of the cathode material and the electrolyte, under a high voltage, the damaging of the cathode material structure and the oxygenolysis of the electrolyte can be effectively inhibited, and the cycle performance and the safety performance of the lithium ion battery can be obviously improved in the high voltage.
Owner:NINGDE AMPEREX TECH
Lithium ion battery nonaqueous electrolyte and lithium ion battery
ActiveCN108336404ASecondary cells servicing/maintenanceOrganic electrolytesAluminium-ion batteryOrganic solvent
The invention provides a lithium ion battery nonaqueous electrolyte and a lithium ion battery, wherein the nonaqueous electrolyte includes an organic solvent, lithium salt and an additive being one ormore selected from the phosphate compounds represented in the formulas (1), (2) and (3). When the phosphate compounds are added to the electrolyte, excellent flame retarding effect is achieved, and auniform protective film can be formed on the surface of a negative electrode material layer by means of the phosphate, thus preventing expansion and falling off of the negative electrode material layer. The nonaqueous electrolyte not only enhances security of the battery but also greatly improves the cycle performance of the battery.
Owner:BYD CO LTD
Incombustible lithium ion battery electrolyte
The invention discloses incombustible lithium ion battery electrolyte, which is prepared from an organic solvent, lithium salt and a cathode film formation additive, wherein the organic solvent is a mixed solvent of trifluoro propylene carbonate and carbonic ester; the cathode film formation additive is fluoroethylene carbonate; the electrolyte lithium salt is lithium hexafluorophosphate. The incombustible lithium ion battery electrolyte has the advantages that by controlling the content of the trifluoro propylene carbonate in the organic solvent, the flame resistant performance of the electrolyte can be improved; through ignition experiments, the condition that when the trifluoro propylene carbonate in the organic solvent accounts for 40 to 75 volume percent, the electrolyte cannot be ignited by open fire is found; meanwhile, through tests, a lithium ion battery prepared by the electrolyte provided by the invention has good cycle-specific volume, high magnification and power characteristics; an important effect is achieved on the development of high-energy-density power batteries with high safety.
Owner:SHANDONG UNIV
Lithium battery negative electrode and lithium battery
InactiveCN110391394ALow lithium overpotentialQuality improvementCell electrodesLi-accumulatorsNickel–lithium batteryPore diameter
The invention relates to the field of a lithium battery, and discloses a lithium battery negative electrode and the lithium battery. The negative electrode includes a porous film layer and a lithium battery negative electrode material layer which are adjacent to each other, the thickness of the porous film layer is 10-200 [mu]m with respect to the lithium battery negative electrode material layerhaving the thickness of 100 [mu]m, wherein, a preparation method for the porous film layer includes the following steps: porous material powder and a binder are formed into a shape, wherein, the specific surface area of the porous material powder is 10-3000 m<2> / g, the pore volume is 0.01-3 cm<3> / g, and the porous material powder is provided with nanopore distribution having the pore diameter of 1-100 nm. The lithium battery negative electrode provided by the invention can effectively avoid growth of lithium dendrites, and has long cycle life. In addition, the lithium battery negative electrode provided by the invention does not require an additional current collector, and prevents mass of a battery from increasing caused by the weight of the additional current collector, thereby enablingthe energy density to be decreased.
Owner:CHNA ENERGY INVESTMENT CORP LTD +1
Preparation method of lithium ion battery cathode material lithium vanadium phosphate
InactiveCN108649223AHigh activityImprove conductivityPhosphatesCell electrodesSodium-ion batteryAmmonium metavanadate
The invention discloses a preparation method of a lithium ion battery cathode material lithium vanadium phosphate, belonging to the field of lithium ion batteries. The technical problem solved by theinvention is that the existing lithium ion battery cathode material lithium vanadium phosphate is complicated in production process, long in cycle, and large in energy consumption. The method comprises the steps of: a, liquid-phase mixing reaction: dissolving lithium nitrate, ammonium metavanadate, ammonium dihydrogen phosphate, carbon source, amine organic matter and additives into water to prepare a solution; b, preparation of precursor: heating and stirring the solution in the step a, heating until the solution is evaporated, and concentrating to form a gelatinous substance, so as to obtainprecursor powder lithium vanadium phosphate after completion of the reaction; and c, carbothermal reduction reaction: preserving temperature of the precursor powder lithium vanadium phosphate at 650-800 degrees centigrade for 4-8 hours under the protection of inert gases to obtain the lithium ion battery cathode material lithium vanadium phosphate. The method provided by the invention has the advantages of simple process steps, short time, energy saving and cost reduction.
Owner:PANZHIHUA UNIV
Lithium sulfide battery
ActiveCN109088055AImprove electrochemical performanceReduce discharge capacity fadingCell electrodesSecondary cellsSlurrySolvent
The invention relates to a lithium sulfide battery, comprising a positive electrode sheet, a negative electrode sheet, a battery separator and an electrolyte. The positive electrode material, the conductive agent, the binder and the solvent are stirred and evenly mixed to obtain a mixed slurry, the mixed slurry uniformly coats the aluminum foil, and the positive electrode sheet is prepared after vacuum drying treatment; A metal lithium sheet is used as a negative electrode sheet, and a polypropylene porous membrane is used as a battery separator; The electrolyte comprises solvent A, solvent Band LiTFSI, wherein the concentration of LiTFSI in the electrolyte is 2-3 mol / L, and the molar ratio of LiTFSI to solvent A is 1: (1.5-2.5); Solvent A is a mixture of one or more of DMC, DEC, DOL, DME; Solvent B is hexafluoroisopropyl methyl ether. The technical scheme can effectively improve the cycle stability of the lithium sulfide battery and reduce the attenuation of the discharge capacity.
Owner:苏州市相城区渭塘城乡发展有限公司
Lithium-ion battery and its electrolyte
ActiveCN102244296BPrevent oxidationImprove securitySecondary cellsHigh temperature storageDecomposition
Owner:DONGGUAN AMPEREX TECH +1
Electrolyte for lithium titanate battery
InactiveCN109860708AImprove compactnessReduce thicknessSecondary cellsOrganic solventElectrical battery
The invention relates to an electrolyte for a lithium titanate battery, which comprises an electrolyte lithium salt, a non-aqueous organic solvent and an additive, wherein the additive ccontains methylene methanedisulfonate (MMDS) and p-toluenesulfonyl isocyanate (PTSI) with a mass ratio of 1:1 to 4:1; and the additive mass accounts for 1.0% to 3.0% of the total mass of the electrolyte. The methylene methanedisulfonate and the p-toluenesulfonyl isocyanate contained in the additive have synergistic effects in a protective film forming process, the isocyanic acid group improves the film formingquality, the film forming thickness is reduced, transmission of lithium ions between negative electrode protective films is improved, and the interface impedance of the lithium ion battery is reduced.After the electrolyte is stored at 50 DEG C to 70 DEG C, the specific power performance is further improved. The electrolyte involved in the invention has high power characteristics while the cycle performance of the lithium titanate battery is improved.
Owner:上海德朗能动力电池有限公司 +2
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