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Lithium ion battery LiNixCoyMn1-x-yO2 anode material reverse microemulsion assisted preparation method

A technology of nickel cobalt lithium manganate and inverse microemulsion, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of cumbersome process, difficult to achieve high uniformity, etc., and achieve stable material structure and high compaction density. , the effect of high conductivity

Active Publication Date: 2015-10-21
中国东方电气集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the existing high-temperature solid-phase sintering process is cumbersome and difficult to achieve a highly uniform effect, and provides an auxiliary preparation method for reverse-phase microemulsion of lithium-ion battery nickel-cobalt-lithium-manganese-oxide positive electrode material, which can be simply and effectively A nickel cobalt lithium manganese oxide positive electrode material with high compacted density and excellent electrochemical performance is prepared, and the method has a simple preparation process and is easy for commercial production

Method used

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  • Lithium ion battery LiNixCoyMn1-x-yO2 anode material reverse microemulsion assisted preparation method
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Embodiment 1

[0030] A lithium-ion battery nickel cobalt lithium manganese oxide positive electrode material reverse phase microemulsion auxiliary preparation method, comprising the following process steps:

[0031] A. Take the soluble salts of nickel, cobalt, manganese and lithium as raw materials and weigh the proportion according to the stoichiometric ratio, wherein the excess of lithium is 10%, dissolve it in deionized water to obtain a metal ion solution, wherein the total concentration of metal ions is 0.2mol / L; add soluble carbonate or oxalate as a precipitant to another deionized water to obtain a precipitant solution, and the concentration of the precipitant is 0.24mol / L;

[0032] B. Fully stir the oil phase, surfactant and co-surfactant to prepare two parts of the same mixed solution, respectively add the metal ion solution and precipitant solution obtained in step A to two parts of the same mixed solution, stir Mix into two parts of uniform inverse microemulsion; the molar ratio...

Embodiment 2

[0036] A lithium-ion battery nickel cobalt lithium manganese oxide positive electrode material reverse phase microemulsion auxiliary preparation method, comprising the following process steps:

[0037] A, take the soluble salt of nickel, cobalt, manganese, lithium as raw material according to stoichiometric ratio weighing ratio, wherein lithium excess 40%, be dissolved in deionized water, obtain metal ion solution, wherein the total concentration of metal ion is 2mol / L; add soluble carbonate or oxalate as a precipitant to another deionized water to obtain a precipitant solution, and the concentration of the precipitant is 2.4mol / L;

[0038]B. Fully stir the oil phase, surfactant and co-surfactant to prepare two parts of the same mixed solution, respectively add the metal ion solution and precipitant solution obtained in step A to two parts of the same mixed solution, stir Mix into two uniform inverse microemulsions; the molar ratio of surfactant to co-surfactant is 1:4, and t...

Embodiment 3

[0042] A lithium-ion battery nickel cobalt lithium manganese oxide positive electrode material reverse phase microemulsion auxiliary preparation method, comprising the following process steps:

[0043] A. Take the soluble salts of nickel, cobalt, manganese and lithium as raw materials and weigh the proportion according to the stoichiometric ratio, wherein the excess lithium is 25%, dissolve it in deionized water, and obtain a metal ion solution, wherein the total concentration of metal ions is 1.1mol / L; add soluble carbonate or oxalate as a precipitant to another deionized water to obtain a precipitant solution, and the concentration of the precipitant is 1.32mol / L;

[0044] B. Fully stir the oil phase, surfactant and co-surfactant to prepare two parts of the same mixed solution, respectively add the metal ion solution and precipitant solution obtained in step A to two parts of the same mixed solution, stir Mix into two parts of uniform inverse microemulsion; the molar ratio ...

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Abstract

Belonging to the technical field of new energy materials, the invention relates to a lithium ion battery LiNixCoyMn1-x-yO2 anode material reverse microemulsion assisted preparation method. The method includes: preparing a metal ion solution and a precipitant solution, then preparing an oil phase, a surfactant and a co-surfactant into two mixed solutions, and adding the metal ion solution and the precipitant solution into the two mixed solutions respectively to obtain two reverse microemulsions, and finally preparing a precursor and an anode material. The preparation process provided by the invention is simple and easy to operate, and the prepared material has the advantages of uniform composition, controllable shape and particle size, large compaction density, stable structure, high electrical conductivity, good reversibility of lithium intercalation and deintercalation, and excellent electrochemical performance.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode material of a lithium ion battery, more specifically, the invention relates to an auxiliary preparation method of an inverse microemulsion for a lithium ion battery nickel cobalt lithium manganese oxide positive electrode material, which belongs to the technical field of energy materials. Background technique [0002] Lithium-ion battery, as a new type of green battery, has developed rapidly since it came out. Among them, the cathode material is an important factor restricting the development of lithium-ion batteries. At present, the widely used lithium-ion battery cathode materials in the market mainly include lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium manganese oxide and lithium iron phosphate. [0003] Nickel cobalt lithium manganese oxide material combines the high voltage of lithium cobalt oxide, lithium manganese oxide and lithium nickel oxide, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 郑威黄兴兰王睿蒋正伟
Owner 中国东方电气集团有限公司
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