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Positive current collector, positive pole piece and electrochemical device

A technology of positive current collectors and positive pole pieces, which is applied in the fields of positive current collectors, positive pole pieces and electrochemical devices, can solve problems such as processing performance and electrical performance degradation, affect the performance of pole pieces and batteries, and improve the weight energy density , small polarization, and high electrochemical performance

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

[0005] However, for the plastic current collector coated with a metal layer, although the weight is reduced, it brings some performance degradation in terms of processing performance and electrical performance, which affects the performance of the pole piece and the battery.

Method used

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  • Positive current collector, positive pole piece and electrochemical device
  • Positive current collector, positive pole piece and electrochemical device
  • Positive current collector, positive pole piece and electrochemical device

Examples

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Embodiment

[0128] 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.

[0129] Preparation

[0130] Preparation of positive electrode current collector

[0131] Select a support layer with a predetermined thickness and carry out surface cleaning treatment, place the support layer after surface cleaning treatment in a vacuum coating room, melt and evaporate the high-purity aluminum wire in the metal evaporation room at a high temperat...

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Abstract

The invention discloses a positive electrode current collector, a positive electrode plate and an electrochemical device. The positive electrode current collector comprises a support layer and a metalconductive layer arranged on the support layer, wherein 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 0.89, and the metal conductive layer is made of one or more of aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy. The positive electrode current collector provided by the invention can give consideration to relatively low weight and relatively high electrical property at the same time, so that the electrochemical device can give consideration to relatively high weight energy density and electrochemical property at the same time.

Description

technical field [0001] The invention belongs to the technical field of electrochemical devices, and in particular relates to a positive electrode current collector, a positive 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. With the continuous expansion of the application range of secondary batteries, everyone's requirements for the weight and energy density of secondary batteries are also getting higher and higher. [0003] In order to obtain a secondary battery with a higher gravimetric energy density, the secondary battery is usually improved as follows: (1) select a positive electrode active material or a negative electrode active material with a high discharge specific capacity; (2) optimize the mechanical design of the secondary battery, ...

Claims

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Application Information

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IPC IPC(8): H01M4/66
CPCH01M4/661H01M4/662H01M4/667Y02E60/10H01M2004/028H01M4/663H01M10/4235H01M2004/021H01M2220/20
Inventor 梁成都黄起森王铈汶
Owner CONTEMPORARY AMPEREX TECH CO
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