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A kind of preparation method of lithium manganese phosphate lithium ion battery cathode material

A lithium ion battery, lithium manganese phosphate technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of complex process and long synthesis time, achieve simple synthesis process, reduce synthesis cost, and realize commercial production. Effect

Inactive Publication Date: 2018-07-13
XINXIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis time of conventional lithium manganese phosphate synthesis method is longer and the process is more complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] 1) Mix 1mol / L manganese acetate, 1mol / L phosphoric acid and 3mol / L lithium hydroxide in a ratio of 1:1:1;

[0021] 2) adding dimethyl sulfoxide equal to the volume of the mixture;

[0022] 3) adjust the pH value of the suspension to 7 with phosphoric acid;

[0023] 4) Place the mixture in a four-necked flask, and heat it in an oil bath at 110°C for 150 minutes under the protection of high-purity argon;

[0024] 5) After the mixture was allowed to stand overnight, it was washed three times by suction filtration with a circulating water vacuum pump, and then three times with ethanol suction filtration;

[0025] 6) The mixture was vacuum-dried at 60° C. for 5 hours.

[0026] Further illustration, the slightly pinkish powder obtained in step 6) is lithium manganese phosphate.

[0027] For further illustration, it can be determined by X-ray diffraction detection that the product obtained in step 6) is lithium manganese phosphate.

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PUM

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Abstract

The present invention relates to a kind of preparation method of lithium manganese phosphate lithium ion battery cathode material, comprising the following steps: 1) mix together with 1mol / L manganese acetate, 1mol / L phosphoric acid 3mol / L lithium hydroxide; 2) add and mix Equal volume of dimethyl sulfoxide; 3) adjust the pH value of the suspension to 7 with phosphoric acid; 4) place the mixture in a four-necked flask, and heat it in an oil bath at 110°C under the protection of high-purity argon 150 minutes; 5) After the mixture was allowed to stand overnight, it was washed three times with a circulating water vacuum pump, and then three times with ethanol; 6) The mixture was vacuum-dried at 60° C. for 5 hours. The advantages of the present invention are: the preparation method of lithium manganese phosphate lithium ion battery positive electrode material according to the present invention not only has a simple synthesis process, but also greatly reduces the synthesis cost of manganese lithium phosphate, thereby facilitating the realization of lithium manganese phosphate commercial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of positive electrode materials of lithium ion batteries, and in particular relates to a preparation method of lithium manganese phosphate, a positive electrode material of lithium ion batteries. Background technique [0002] Lithium-ion battery is a new type of battery after nickel-cadmium and nickel-metal hydride batteries. Due to the obvious advantages of lithium-ion batteries (high working voltage, small size, light weight, high energy, no memory effect, no pollution, small self-discharge, and long cycle life), it has become an ideal power source for portable electronic products and is also the future The preferred power source for EVs and HEVs. [0003] At present, lithium-ion battery positive electrodes mainly include lithium cobalt oxide (LiCoO 2 ), lithium nickelate (LiNiO 2 ), lithium manganate (LiMn 2 o 4 ), lithium iron phosphate (LiFePO 4 ), lithium manganese phosphate (LiMnP...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/1397
CPCH01M4/1397H01M4/5825Y02E60/10
Inventor 付小宁
Owner XINXIANG UNIV