Preparation method of lithium titanate coated lithium ion battery nickel cobalt manganese cathode material

A lithium titanate-coated, lithium-ion battery technology, applied to battery electrodes, batteries, circuits, etc., can solve the problems of long sintering time, increased material production costs, and complicated steps in high-temperature treatment processes, so as to reduce production processes and inhibit Irreversible capacity loss, effect of improving safety

Inactive Publication Date: 2016-07-20
SHANDONG YUHUANG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these techniques either require complicated steps, or require subsequent high-temperature treatment processes and long sintering times, which increase the production cost of the material

Method used

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  • Preparation method of lithium titanate coated lithium ion battery nickel cobalt manganese cathode material
  • Preparation method of lithium titanate coated lithium ion battery nickel cobalt manganese cathode material
  • Preparation method of lithium titanate coated lithium ion battery nickel cobalt manganese cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of lithium titanate material:

[0027] At room temperature, dissolve lithium acetate, tetrabutyl titanate, and oxalic acid in an aqueous solution of absolute ethanol, stir and ultrasonically dissolve them completely; first slowly add the oxalic acid solution to the tetrabutyl titanate solution, and simultaneously Stir for about 30-40 minutes to obtain a white sol; then slowly add lithium acetate solution dropwise to the above white sol, and age to obtain a light yellow transparent gel or white gel; secondly, place the gel in a heating mantle and heat at 80°C Stir to obtain a white gel; place it in a blast drying oven at 80°C for 12 hours, and remove the solvent to obtain a white / light yellow xerogel. The precursor was treated at 600°C for 6 hours, and then at 800°C for 8 hours to obtain a lithium titanate negative electrode material;

[0028] (2) Preparation of lithium titanate coated nickel cobalt lithium manganese oxide

[0029] According to the mass...

Embodiment 2

[0040] (1) Preparation of lithium titanate material:

[0041] At room temperature, dissolve lithium acetate, tetrabutyl titanate, and oxalic acid in an aqueous solution of absolute ethanol, stir and ultrasonically dissolve them completely; first slowly add the oxalic acid solution to the tetrabutyl titanate solution, and simultaneously Stir for about 30-40 minutes to obtain a white sol; then slowly add lithium acetate solution dropwise to the above white sol, and age to obtain a light yellow transparent gel or white gel; secondly, place the gel in a heating mantle and heat at 80°C Stir to obtain a white gel; place it in a blast drying oven at 80°C for 12 hours, and remove the solvent to obtain a white / light yellow xerogel. The precursor was treated at 600°C for 6 hours, and then at 800°C for 8 hours to obtain a lithium titanate negative electrode material;

[0042] (2) Preparation of lithium titanate coated nickel cobalt lithium manganese oxide

[0043] According to the mass...

Embodiment 3

[0045] (1) Preparation of lithium titanate material:

[0046] At room temperature, dissolve lithium acetate, tetrabutyl titanate, and oxalic acid in an aqueous solution of absolute ethanol, stir and ultrasonically dissolve them completely; first slowly add the oxalic acid solution to the tetrabutyl titanate solution, and simultaneously Stir for about 30-40 minutes to obtain a white sol; then slowly add lithium acetate solution dropwise to the above white sol, and age to obtain a light yellow transparent gel or white gel; secondly, place the gel in a heating mantle and heat at 80°C Stir to obtain a white gel; place it in a blast drying oven at 80°C for 12 hours, and remove the solvent to obtain a white / light yellow xerogel. The precursor was treated at 600°C for 6 hours, and then at 800°C for 8 hours to obtain a lithium titanate negative electrode material;

[0047] (2) Preparation of lithium titanate coated nickel cobalt lithium manganese oxide

[0048] According to the mass...

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PUM

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Abstract

The invention relates to the technical field of battery materials, in particular to a preparation method of the lithium titanate coated lithium ion battery nickel cobalt manganese cathode material. According to the method, the existing preparation process of the lithium ion battery cathode material is improved, a lithium titanate nanomaterial is synthesized via a sol-gel method and then dipped on a nickel cobalt manganese ternary material via a solution method, so that the composite material high in safety, good in cycling stability and high in initial coulomb efficiency is obtained. The method is simple, feasible, high in production efficiency and suitable for large-scale production, production procedures are reduced, sintering temperature is lowered, sintering time is shortened, and production cost is saved.

Description

(1) Technical field [0001] The invention relates to the technical field of battery materials, in particular to a preparation method of lithium titanate-coated lithium-ion battery nickel-cobalt-manganese cathode material. (2) Background technology [0002] At present, there are three main material systems in the automotive power lithium battery market: lithium manganese oxide battery, lithium iron phosphate battery, and nickel-cobalt-manganese ternary material lithium battery. Relatively speaking, the ternary lithium-ion power battery was the first to be used, and has the advantages of the highest energy density, mature technology, high platform voltage, and mature raw material supply. It is also the most widely used in electric bicycles and motorcycles. Due to its safety and service life, the high-capacity and high-voltage ternary lithium power battery pack is very dangerous, which restricts its application in pure electric vehicles. Therefore, safety issues are the key is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M4/62
CPCH01M4/485H01M4/505H01M4/525H01M4/621H01M2220/20Y02E60/10
Inventor 王文阁宋春华王瑛乔文灿赵成龙薛嘉渔冯涛赵艳丽
Owner SHANDONG YUHUANG NEW ENERGY TECH
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