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Spinel positive electrode material using trace Zn to replace Mn, and preparation method thereof

A cathode material, spinel technology, applied in the field of cathode materials for lithium-ion batteries, can solve problems such as crystal structure collapse, and achieve the effects of promoting grain growth, smooth surface, and convenient operation

Inactive Publication Date: 2020-06-26
海安常州大学高新技术研发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to improve the stability of the spinel lithium nickel manganese oxide positive electrode material and improve the problem of crystal structure collapse during the cycle, the present invention proposes a spinel lithium nickel manganese oxide positive electrode material that replaces Mn with Zn

Method used

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  • Spinel positive electrode material using trace Zn to replace Mn, and preparation method thereof
  • Spinel positive electrode material using trace Zn to replace Mn, and preparation method thereof
  • Spinel positive electrode material using trace Zn to replace Mn, and preparation method thereof

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Embodiment Construction

[0030] 1. Precursor preparation.

[0031] 1. Preparation of metal salt solution:

[0032] The following nickel salts can be any one of nickel sulfate, nickel nitrate or nickel acetate.

[0033] The following manganese salts are any one of manganese sulfate, manganese nitrate or manganese acetate.

[0034] The following zinc salts are any one of zinc sulfate, zinc nitrate or zinc acetate.

[0035] Mix nickel salt, manganese salt and zinc salt evenly, add deionized water, and prepare a metal salt solution with a metal salt concentration of 1-2 mol / L. Among them, the metal salt is composed of nickel, manganese and zinc, and the molar numbers of the three ions of nickel, manganese and zinc in the metal salt solution are o, y and 1-o-y respectively, and: 0.1<o≤1, 0.1≤y ≤1, 0<1-o-y≤1.

[0036] In this embodiment, sulfate is used to configure the mixed metal salt solution. Weigh respectively: 43.8g of nickel sulfate hexahydrate, 84.5g of manganese sulfate monohydrate and 47.9g o...

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Abstract

The invention discloses a spinel positive electrode material using trace Zn to replace Mn, and a preparation method thereof, and belongs to the technical field of lithium ion battery positive electrode material production. A carbonate coprecipitation method is adopted, a metal salt solution and a precipitant solution are controlled to react in a base solution to prepare a precursor, and the precursor is calcined to obtain the positive electrode material. A more powerful bracket is provided for the material to improve the stability of the material, so the performances of the positive electrodematerial are obviously improved, and the cycle performance is improved.

Description

technical field [0001] The invention belongs to the technical field of production of positive electrode materials of lithium ion batteries, in particular spinel lithium nickel manganese oxide positive electrode materials. Background technique [0002] Spinel lithium nickel manganese oxide cathode material has good performance, high capacity, excellent cycle performance and coulombic rate, low cost and good safety, so it has received widespread attention. At present, the preparation technology of spinel lithium nickel manganese oxide cathode material is becoming more and more mature, and has been widely used in lithium-ion power batteries. However, there are also some problems. Although the spinel lithium nickel manganese oxide positive electrode material has a high discharge specific energy, this type of material is prone to structural collapse and crystal distortion during the cycle, and the crystal structure is destroyed. The embedding and emigration are affected, and the...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G53/006H01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/028C01P2006/40Y02E60/10
Inventor 刘振
Owner 海安常州大学高新技术研发中心