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Battery

A battery, non-aqueous electrolyte technology, applied to the battery. It can solve the problems of low cycle life, failure to balance battery cycle life and low temperature performance, high voltage, etc., and achieve the effect of improving cycle life

Active Publication Date: 2022-02-08
ZHUHAI COSMX BATTERY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a battery that has the performance of high voltage, long cycle life and low expansion in order to solve the

Method used

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Example

[0050] Comparative Example 1-5 and Example 1-8

[0051] Comparative Examples 1-5 and Examples 1-8 were prepared lithium ion battery was prepared according to the method described below, differ only in the choice separator and an electrolyte, the specific differences as shown in Table 1.

[0052] (1) Preparation of positive electrode sheet

[0053] The positive electrode active material LiCoO 2 , A binder polyvinylidene fluoride (PVDF), acetylene black as a conductive agent in a weight ratio of 98: 1.0: 1.0 were mixed, added to N- methylpyrrolidone (NMP), stirred under action of vacuum mixer, mixed until a uniform flow into the system of positive electrode slurry; positive electrode slurry was uniformly coated on an aluminum foil thickness of 10μm; the coated aluminum foil in the above-described section 5 after different temperature gradient oven baking, and then dried in an oven at 120 deg.] C to 8h , then passed through a roll press, to obtain the desired cut piece of the positi...

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Abstract

The invention discloses a battery, and the battery comprises a positive plate, a negative plate, a diaphragm and a non-aqueous electrolyte; the non-aqueous electrolyte comprises a non-aqueous organic solvent and an additive, and the non-aqueous organic solvent at least comprises ethyl propionate; the additive comprises 1, 3-propane sultone and lithium difluoro (oxalato) borate; the diaphragm comprises a base material, heat-resistant layers and a gluing layer, the heat-resistant layers are oppositely arranged on the two faces of the base material, and the gluing layer is arranged on the heat-resistant layers; and the ratio of the mass percentage content of ethyl propionate in the non-aqueous electrolyte to the mass ratio of HFP in the hexafluoropropylene-vinylidene fluoride copolymer in the adhesive of the gluing layer is 0.2-60. Through the synergistic effect of the diaphragm and the electrolyte, the battery is prepared by combining the positive and negative electrode materials, so that the cycle life of the battery can be effectively prolonged, the cycle expansion of the battery can be effectively reduced, and the low-temperature performance of the battery is also considered.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a battery. Background technique [0002] In recent years, lithium-ion batteries have been widely used in smartphones, tablet computers, smart wearables, power tools, and electric vehicles. With the wide application of lithium-ion batteries, consumers' demands on the service life and application environment of lithium-ion batteries continue to increase, which requires lithium-ion batteries to have a long cycle life while taking into account high and low temperature performance. [0003] At present, there are safety hazards in the use of lithium-ion batteries. For example, when the battery is used for a long time and the ambient temperature is too high, the battery will have problems such as lithium deposition and increased thickness expansion, which will easily lead to serious safety accidents, such as fire. Even explode. At the same time, it is difficult to discha...

Claims

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Application Information

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IPC IPC(8): H01M10/0569H01M10/0567H01M50/457H01M50/489H01M10/42H01M10/0525
CPCH01M10/0569H01M10/0567H01M50/457H01M50/489H01M10/4235H01M10/0525H01M2300/0028Y02E60/10
Inventor 母英迪张祖来王海李素丽
Owner ZHUHAI COSMX BATTERY CO LTD
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