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Negative current collector, negative pole piece and electrochemical device

A negative pole piece and current collector technology, applied in the field of electrochemical devices, can solve the problems of electrical performance degradation, affecting the performance of pole piece and battery, etc., and achieve the effect of low impedance, small polarization, and weight reduction

Pending Publication Date: 2021-01-05
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the plastic current collector coated with a metal layer, although the weight is reduced, it brings some performance degradation in terms of electrical performance and other aspects, which affects the performance of the pole piece and the battery.

Method used

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  • Negative current collector, negative pole piece and electrochemical device
  • Negative current collector, negative pole piece and electrochemical device
  • Negative current collector, negative pole piece and electrochemical device

Examples

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Embodiment

[0133] The following examples describe the present disclosure more specifically, and these examples are for illustrative purposes only, since various modifications and changes within the scope of the present disclosure will be apparent to those skilled in the art. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples are based on weight, and all reagents used in the examples are commercially available or synthesized according to conventional methods, and can be directly The instruments used without further processing, as well as in the examples, are commercially available.

[0134] Preparation

[0135] Preparation of negative electrode collector

[0136] Select a support layer with a predetermined thickness and perform surface cleaning treatment, place the support layer after surface cleaning treatment in a vacuum plating room, and melt and evaporate the high-purity copper wire in the metal evaporation room at a high temperature of 1...

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Abstract

The invention discloses a negative current collector, a negative pole piece and an electrochemical device. The negative current collector comprises a support layer and a metal conductive layer arranged on the support layer, the ratio of the density of the metal conductive layer to the intrinsic density of the material of the metal conductive layer is greater than or equal to 0.7, and the metal conductive layer is made of one or more of copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy. The negative electrode current collector provided by the invention can simultaneously consider relatively low weight and relatively high electrical performance, so that the electrochemical device can simultaneously consider relatively high weight energy density andelectrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of electrochemical devices, and in particular relates to a negative electrode current collector, a negative electrode sheet and an electrochemical device. Background technique [0002] Due to the advantages of high energy density, high output power, long cycle life and low environmental pollution, secondary batteries are widely used in electric vehicles and consumer electronics products. However, as the application range of secondary batteries continues to expand, everyone has higher and higher requirements for the weight and energy density of secondary batteries. [0003] In order to obtain a secondary battery with a high gravimetric energy density, the weight of each component of the secondary battery can be reduced. Among them, the improvement of the current collector is usually to select a lighter weight current collector, for example, a plastic current collector coated with a metal layer can be used. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/06H01M4/131H01M4/133H01M4/134H01M6/14H01M10/0525H01M10/054
CPCH01M4/661H01M4/662H01M4/667H01M4/134H01M4/133H01M4/131H01M4/06H01M10/0525H01M10/054H01M6/14H01M4/66H01M4/70Y02E60/10
Inventor 刘欣彭佳李铭领黄起森梁成都
Owner CONTEMPORARY AMPEREX TECH CO
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