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A lithium battery with excellent cycle performance

A cycle performance, lithium battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unsatisfactory cycle life and unavailability of lithium batteries, improve cycle stability, inhibit nickel-lithium mixing, and prevent corrosion. Effect

Active Publication Date: 2021-11-16
苏州市相城区渭塘城乡发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium batteries have been widely used in all walks of life, but the cycle life of lithium batteries currently produced is still unsatisfactory. Although various methods for improving the cycle life of lithium batteries have been reported in various literatures, their actual use Unable to obtain the expected effect in the process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Accurately weigh carbon black, ammonium tetrathiomolybdate, ternary cathode material, deionized water, and absolute ethanol for later use. The carbon black that weighs is poured into the deionized water that takes, adopt ultrasonic instrument 50kHz supersonic dispersion treatment 30min to obtain carbon black dispersion liquid, the mass concentration of carbon black in the carbon black dispersion liquid is 5g / L, tetrathiomolybdic acid Ammonium was added to the carbon black dispersion and magnetically stirred and mixed for 5 minutes to obtain a mixed solution A. Ammonium tetrathiomolybdate was added according to the ratio of carbon black and ammonium tetrathiomolybdate in the mixed solution A to a mass ratio of 1:2. Then move the mixed solution A to a polytetrafluoroethylene reactor (polytetrafluoroethylene-lined reactor, the same below), seal the polytetrafluoroethylene reactor and move it to oven A (air heat or water heat, the same below). ) at 250°C for 20 hours. Afte...

Embodiment 2

[0032]Accurately weigh carbon black, ammonium tetrathiomolybdate, ternary cathode material, deionized water, and absolute ethanol for later use. The carbon black that weighs is poured into the deionized water that takes, adopt ultrasonic instrument 50kHz supersonic dispersion treatment 30min to obtain carbon black dispersion liquid, the mass concentration of carbon black in the carbon black dispersion liquid is 5g / L, tetrathiomolybdic acid Ammonium was added to the carbon black dispersion and magnetically stirred and mixed for 5 minutes to obtain a mixed solution A. Ammonium tetrathiomolybdate was added according to the ratio of carbon black and ammonium tetrathiomolybdate in the mixed solution A to a mass ratio of 1:2. Then move the mixed solution A to a polytetrafluoroethylene reactor (polytetrafluoroethylene-lined reactor, the same below), seal the polytetrafluoroethylene reactor and move it to oven A (air heat or water heat, the same below). ) at 250°C for 20 hours. After...

Embodiment 3

[0038] Accurately weigh carbon black, ammonium tetrathiomolybdate, ternary cathode material, deionized water, and absolute ethanol for later use. The carbon black that weighs is poured into the deionized water that takes, adopt ultrasonic instrument 50kHz supersonic dispersion treatment 30min to obtain carbon black dispersion liquid, the mass concentration of carbon black in the carbon black dispersion liquid is 5g / L, tetrathiomolybdic acid Ammonium was added to the carbon black dispersion and magnetically stirred and mixed for 5 minutes to obtain a mixed solution A. Ammonium tetrathiomolybdate was added according to the ratio of carbon black and ammonium tetrathiomolybdate in the mixed solution A to a mass ratio of 1:2. Then move the mixed solution A to a polytetrafluoroethylene reactor (polytetrafluoroethylene-lined reactor, the same below), seal the polytetrafluoroethylene reactor and move it to oven A (air heat or water heat, the same below). ) at 250°C for 20 hours. Afte...

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PUM

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Abstract

The invention discloses a lithium battery with excellent cycle performance, which includes a positive electrode sheet, a negative electrode sheet and an electrolyte; the positive electrode sheet is prepared by uniformly coating aluminum foil with a modified ternary positive electrode material; the modified ternary positive electrode material is made of molybdenum The sulfur modified material is obtained by coating and modifying the ternary positive electrode material; the negative electrode sheet is composed of metal lithium sheet; the electrolyte includes solvent A, solvent B and LiPF 6 , LiPF in the electrolyte 6 The concentration of LiPF is 2~3mol / L, LiPF 6 The molar ratio with solvent A is 1: (1.5~2.5); solvent A is a mixture of one or more of EC, EMC, DMC, DEC; solvent B is hexafluoroisopropyl methyl ether, the cycle of the above lithium battery Excellent performance.

Description

technical field [0001] The invention relates to the field of lithium battery production, in particular to a lithium battery with excellent cycle performance. Background technique [0002] Lithium batteries have been widely used in all walks of life, but the cycle life of lithium batteries currently produced is still unsatisfactory. Although various methods for improving the cycle life of lithium batteries have been reported in various literatures, their actual use The expected effect cannot be obtained in the process. Therefore, it is necessary to provide a more obvious method for improving the effect. Contents of the invention [0003] The purpose of the present invention is to provide a method for improving the performance of the ternary cathode material, which can significantly improve the cycle performance of the ternary material. [0004] A lithium battery with excellent cycle performance is characterized in that it includes a positive electrode sheet, a negative el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/58H01M4/62H01M10/0525H01M10/0569
CPCH01M4/366H01M4/505H01M4/525H01M4/5815H01M4/625H01M10/0525H01M10/0569H01M2300/0037Y02E60/10
Inventor 胡小玲其他发明人请求不公开姓名
Owner 苏州市相城区渭塘城乡发展有限公司
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