Electrochemical device

An electrochemical and chemical compound technology, applied in the field of electrochemical energy storage, can solve the problems of incompatibility between the electrolyte and the electrodes of electrochemical devices, and achieve the effect of improving cycle life, improving cycle life, and improving stability

Pending Publication Date: 2022-07-29
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented technology relates to improving the performance of batteries used for electronic devices such as smartphones or tablets that use metal-based anode materials (such as Li) due to their ability to store more energy than traditional battery chemistry systems like lead acid). This results in longer lifespan compared to current designs where there are no active ingredients inside them.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the cycle-life (cycling) efficiency for Lithium Ion batteries due to their complicated compositions of different materials that can be harmful or even beneficial when they work together properly within certain limits.

Method used

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  • Electrochemical device
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Examples

Experimental program
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Effect test

preparation example 1

[0110] (1) Preparation of positive electrode sheet

[0111] Weigh 972 g, 14 g, and 14 g of positive electrode active material lithium cobalt oxide, carbon black conductive agent, and polyvinylidene fluoride (PVDF) as a binder, respectively, and disperse them in 400 g of N-methylpyrrolidone (NMP). Stir to form a uniform positive electrode slurry, coat the positive electrode slurry on the aluminum foil of the positive electrode current collector, and then dry, roll and cut to obtain a positive electrode sheet.

[0112] (2) Preparation of negative electrode sheet

[0113] Preparation of conventional negative electrode sheet: Weigh the negative electrode active material (graphite and / or silicon oxide and / or silicon carbon composite material), carbon black conductive agent, binder styrene-butadiene rubber (SBR), thickener carboxymethyl fiber respectively. Plain sodium (CMC) 970g, 10g, 10g (by solid weight), 10g, dispersed in 1100g of deionized water, fully stirred to form a unifo

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Abstract

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to an electrochemical device. The positive electrode electrolyte and the negative electrode electrolyte are separated through the solid electrolyte membrane, a high-content nitrile compound is added into the positive electrode electrolyte, a high-content ether compound is added into the negative electrode electrolyte, the nitrile compound can effectively improve the stability of a positive electrode interface, and the ether compound can effectively improve the stability of a negative electrode interface; the nitrile compound does not penetrate through the negative electrode to generate adverse side reaction with the negative electrode, and the ether compound does not penetrate through the positive electrode to generate adverse oxidation reaction with the positive electrode, so that the cycle life of the electrochemical device is prolonged, and particularly, the cycle life of the electrochemical device containing metal lithium in the negative electrode is prolonged.

Description

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Claims

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Application Information

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Owner ZHUHAI COSMX BATTERY CO LTD
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