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electrochemical device

An electrochemical and chemical compound technology, applied in the field of electrochemical devices, can solve problems such as electrolyte multiple side reactions, potential safety hazards, battery gas and heat production, etc.

Active Publication Date: 2021-01-15
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Under overcharge conditions, conventionally used batteries tend to produce gas and heat, causing potential safety hazards; and under high temperature conditions, the electrolyte of the battery will have more side reactions, resulting in thermal runaway of the battery cell, causing the battery cell to explode and catch fire, etc. safe question

Method used

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Examples

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Embodiment

[0165] The implementation of the present application will be illustrated below in conjunction with the examples. It should be understood that these examples are only used to illustrate the present application and are not intended to limit the scope of protection claimed in the present application.

[0166] Preparation

[0167]1) Preparation of electrolyte

[0168] In an argon atmosphere glove box with a water content 6 (1mol / L) is dissolved in above-mentioned non-aqueous solvent, finally add the additive of certain quality, be made into the electrolytic solution in the embodiment.

[0169] A compound containing 2-3 functional groups of cyano groups or other SEI film-forming additives are added to the basic electrolyte.

[0170] 2) Isolation film

[0171] Exemplary composite separators used in the examples are the following low temperature closed cell separators (LTS-1, LTS-2, LTS-3):

[0172] LTS-1: Three-layer composite, the second porous layer is set between the two fir...

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Abstract

The present application relates to an electrochemical device, which includes a separator and an electrolyte, wherein the separator includes a first porous layer and a second porous layer; the electrolyte includes at least one compound containing 2-3 cyano functional groups.

Description

technical field [0001] The present application relates to an electrochemical device, in particular to an electrochemical device comprising a separator and an electrolyte. Background technique [0002] Due to the characteristics of high energy density, low maintenance, relatively low self-discharge, long cycle life, no memory effect, high working voltage and environmental friendliness, lithium-ion batteries have attracted widespread attention and are widely used in smart products (including mobile phones) , notebooks, cameras and other electronic products), power tools and electric vehicles, and are gradually replacing traditional nickel-cadmium and nickel-metal hydride batteries. However, with the rapid development of technology and the diversity of market needs, people have put forward more requirements for power supplies of electronic products, such as thinner, lighter, more diverse shapes, higher volumetric energy density and mass energy density , higher security, higher...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/414H01M50/417H01M50/423H01M50/431H01M50/451H01M10/0525H01M10/0567H01M10/0569H01M10/058H01M50/411H01M50/426H01M50/434H01M50/446H01M50/449H01M50/457H01M50/489
CPCH01M10/0567H01M10/0569H01M10/0525H01M10/058H01M50/446H01M50/451H01M50/426H01M50/489H01M50/417H01M50/434H01M50/457H01M10/4235H01M50/449Y02E60/10H01M50/491H01M2300/0025
Inventor 彭谢学郑建明唐超南海洋
Owner NINGDE AMPEREX TECH