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Lithium-ion battery preparation process of nickel-cobalt-aluminum ternary cathode material

A lithium-ion battery and cathode material technology, which is applied in the manufacture of electrolyte batteries, positive electrodes, battery electrodes, etc., can solve the problems of poor cycle performance, poor storage performance, poor thermal stability, etc. The effect of high energy density and excellent electrochemical performance

Active Publication Date: 2022-03-11
TIANNENG BATTERY WUHU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the directly prepared nickel-cobalt-aluminum ternary cathode material has poor cycle performance, poor thermal stability, and poor storage performance. These shortcomings are the essential properties of the material.

Method used

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Embodiment Construction

[0017] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with examples, which are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0018] This embodiment provides a lithium-ion battery preparation process of a nickel-cobalt-aluminum ternary positive electrode material, including the following steps:

[0019] Step 1: Prepare the precursor of the nickel-cobalt-aluminum ternary cathode material, ball mill the precursor for 30 minutes, and then sieve the sieve with a mesh of 400 mesh;

[0020] Step 2: Add graphene to the ball-milled and sieved precursor powder, then ball-mill for 30 minutes, add deionized water to ultrasonically disperse evenly, then dry and sinter to obtain a graphene-coated ternary cathode material;

[0021] Step 3: Ball mill the graphene-coated ternary cathode material for 30 minutes, add Zr for ball ...

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Abstract

The purpose of the present invention is to provide a lithium-ion battery preparation process for a nickel-cobalt-aluminum ternary positive electrode material, first prepare the precursor of the ternary positive electrode material, then add graphene for mixed sintering, then add Zr for mixed sintering, and finally add Boron oxide is mixed and sintered to obtain a ternary positive electrode material coated with graphene and boron oxide doped with Zr, and then graphene is used as the negative electrode of the battery to prepare a 18650 cylindrical graphene power battery, and finally electrochemical tests are performed to obtain A high-performance lithium-ion battery with excellent performance, the prepared battery has excellent electrochemical performance, high energy density and strong high-current discharge capacity.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a lithium ion battery preparation process of a nickel-cobalt-aluminum ternary positive electrode material. Background technique [0002] At present, it is of great significance to develop high-performance nickel-cobalt-aluminum ternary cathode materials and their batteries. For the nickel-cobalt-aluminum ternary cathode material, it is necessary to prepare the precursor first, and then prepare the cathode material. However, the directly prepared nickel-cobalt-aluminum ternary cathode material has poor cycle performance, poor thermal stability, and poor storage performance. These shortcomings are the essential properties of the material. In order to overcome the disadvantages of nickel-cobalt-aluminum ternary cathode materials and obtain the advantages of high specific capacity and high stability, coating and doping modification are currently common methods. It is necessary ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/525H01M4/131H01M10/0525H01M10/058
CPCH01M4/131H01M4/364H01M4/366H01M4/485H01M4/525H01M10/0525H01M10/058H01M2004/028Y02E60/10Y02P70/50
Inventor 钦晓峰陈林陈瑛汪章杰侍子强
Owner TIANNENG BATTERY WUHU
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