Method for preparing low-temperature semi-solid phase of lithium ion battery positive material

A technology for lithium-ion batteries and cathode materials, which is applied in the field of low-temperature semi-solid phase preparation of cathode materials for lithium-ion batteries, can solve problems such as uneven mixing, uneven reaction, and unstable performance of batch products in solid-phase methods, and achieve Overcome the effects of large water treatment capacity, simple equipment, and excellent electrochemical properties

Inactive Publication Date: 2006-09-06
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

Therefore, the solid-phase method has disadvantages such as uneven mixing, uneven reaction, and unstable performance of batch products.

Method used

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  • Method for preparing low-temperature semi-solid phase of lithium ion battery positive material
  • Method for preparing low-temperature semi-solid phase of lithium ion battery positive material
  • Method for preparing low-temperature semi-solid phase of lithium ion battery positive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Synthesis of pure spinel phase Li by low temperature semi-solid phase method 1.08 mn 2 o 4

[0028] Place 0.108mol (4.53g) of lithium hydroxide monohydrate and 0.200mol (22.99g) of manganese carbonate in a planetary ball mill, grind and mix evenly, then slowly add 8ml of 5% hydrogen peroxide aqueous solution, and mix the above wet materials After fully kneading and wet mixing, put it into a 60°C vacuum oven filled with water at the bottom, adjust the vacuum degree to control the humidity and dry slowly. The dried material is synthesized at a low temperature of 480°C for 10 hours, and then crystallized at a high temperature of 780°C for 5 hours. The resulting black powder is Li-ion battery cathode material Li 1.08 mn 2 o 4 .

Embodiment 2

[0029] Example 2: Synthesis of spinel phase LiCo by low temperature semi-solid phase method 0.1 mn 1.9 o 4

[0030] Put 0.1mol (4.19g) of lithium hydroxide monohydrate, 0.01mol of cobalt acetate (1.77g) and 0.19mol of manganese carbonate (21.84g) in a planetary ball mill and grind them evenly, then slowly add 6ml of 5% Hydrogen peroxide aqueous solution, fully knead the above wet materials, after wet mixing evenly, put it into a 60°C vacuum oven filled with water at the bottom, adjust the vacuum degree to control the humidity and dry slowly, and dry the materials at 520°C for 12 hours. Then crystallize at a high temperature of 800°C for 4 hours, and the obtained black powder is LiCo, the positive electrode material for lithium-ion batteries. 0.1 mn 1.9 o 4 .

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Abstract

The method includes steps: according to proportion, mixing material of manganese source, material of doped elements and material of lithium source; carrying out preliminary treatments for the said materials; after wet mixing, synthesizing material of positive pole under 350 deg.C - 500 deg.C low temperature; carrying out crystallizing qualified treatment in 700 deg.C -900 deg.C high temperature for short time so as to obtain material of positive pole of lithium ion battery in pure phase and high crystal quality. Reserving strongpoint of solid phase method, accepting merit of liquid phase and overcoming shortcoming of pure solid phase method, the invention possesses features of cheap materials, fine electrochemical performances, simple equipment, non toxic matter produced.

Description

technical field [0001] The present invention relates to a kind of spinel LiM X mn 2-X o 4 (M=Co, Ni, Cr, x=0~0.3) A new preparation and synthesis method of lithium-ion battery positive electrode material - low temperature semi-solid phase method. Background technique [0002] Due to the advantages of high voltage, high energy density, large output power, fast charging and discharging, excellent cycle performance, long service life, high charging efficiency, wide operating temperature range, small self-discharge, no battery memory effect, and no environmental pollution, etc., Lithium-ion secondary battery is also known as the green energy battery of the 21st century. It can be widely used in mobile phones, notebook computers, video recorders and other electrical appliances. Its unique performance is especially suitable for the miniaturization and high-energy of electronic products. According to the requirements of development, it can also be used in cutting-edge fields suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/48C01D15/00H01M4/02H01M4/50
CPCH01M4/1391C01G45/1242C01G51/54C01G53/54C01P2002/52C01P2002/54C01P2002/88C01P2006/40H01M4/0471H01M4/505H01M2004/021H01M2004/023Y02E60/122Y02E60/10
Inventor 周园贾永忠马培华韩金铎景燕
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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