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Electrochemical device and electronic device including same

An electrochemical and electrolyte technology, applied in the field of energy storage, can solve the problems of reduced charge/discharge capacity and performance degradation of lithium-ion batteries

Active Publication Date: 2020-09-08
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As cycling progresses, lithium-ion batteries typically experience a decrease in charge / discharge capacity, deteriorating the performance of the lithium-ion battery

Method used

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  • Electrochemical device and electronic device including same
  • Electrochemical device and electronic device including same
  • Electrochemical device and electronic device including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0122] The performance evaluation of the examples and comparative examples of the lithium-ion battery according to the present application will be described below.

[0123] 1. Preparation of lithium ion battery

[0124] (1) Preparation of negative electrode

[0125] Mix the negative electrode active material, styrene-butadiene rubber and binder with deionized water in a mass ratio of 95:2:2:1, and stir evenly to obtain negative electrode slurry. The negative electrode slurry was coated on a 12 μm copper foil, dried, cold pressed, cut into pieces, and tabs were welded to obtain a negative electrode.

[0126] (2) Preparation of positive electrode

[0127] Lithium cobalt oxide (LiCoO 2 ), conductive carbon (Super-P) and polyvinylidene fluoride (PVDF) were mixed with N-methylpyrrolidone (NMP) according to the mass ratio of 95:2:3, and stirred evenly to obtain positive electrode slurry. The positive electrode slurry was coated on a 12 μm aluminum foil, dried, cold pressed, cut ...

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Abstract

The present application relates to an electrochemical device and an electronic device including the same. Specifically, the present application provides an electrochemical device, which includes a positive electrode, a negative electrode, and an electrolyte, wherein the negative electrode includes carbon materials and hydroxyalkylmethylcellulose, and the electrolyte includes propionate. The electrochemical device of the present application has excellent cycle, storage and low temperature performance.

Description

technical field [0001] The present application relates to the technical field of energy storage, in particular to an electrochemical device and an electronic device including the same, especially to a lithium-ion battery. Background technique [0002] The demand for electrochemical devices has increased significantly with the development of technology and increased demand for mobile devices. Electrochemical devices with high energy density and excellent lifetime and cycle characteristics are one of the research directions. [0003] The theoretical capacity of an electrochemical device (eg, lithium ion battery) may vary depending on the kind of negative electrode active material. Lithium-ion batteries typically suffer from a decrease in charge / discharge capacity as cycling progresses, deteriorating the performance of the Li-ion battery. [0004] In view of this, it is indeed necessary to provide an improved electrochemical device with excellent cycle, storage and low temper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M10/0569H01M4/587H01M4/583H01M4/36H01M10/0567H01M10/052H01M10/0525
CPCH01M4/621H01M10/0569H01M4/587H01M4/583H01M4/362H01M10/0567H01M10/052H01M10/0525H01M4/386H01M4/483H01M4/485H01M4/38Y02E60/10H01M4/622H01M2004/027H01M2300/0028H01M4/133H01M4/60H01M10/0568H01M2004/021
Inventor 王可飞
Owner NINGDE AMPEREX TECH
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