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Hydrothermal preparation method of copper-doped zinc oxide composite lithium iron phosphate cathode material

A technology of composite lithium iron phosphate and positive electrode materials, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of restricting commercial development and low electronic and ion conductivity

Inactive Publication Date: 2011-12-14
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this material also has obvious shortcomings such as low electronic and ion conductivity, which limits the commercial development of this material to a certain extent.

Method used

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  • Hydrothermal preparation method of copper-doped zinc oxide composite lithium iron phosphate cathode material
  • Hydrothermal preparation method of copper-doped zinc oxide composite lithium iron phosphate cathode material
  • Hydrothermal preparation method of copper-doped zinc oxide composite lithium iron phosphate cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] [1] Take 10ml of 1.5mol / L LiOH solution, mix 0.5mol / L H 3 PO 4 10ml of the solution was slowly dropped into the LiOH solution dropwise, and fully stirred in an ice-water bath for 1 hour to obtain a white colloidal solution A.

[0019] [2] Another 0.5mol / L of Zn(Ac) 2 Solution 1ml, 0.01mol / L CuCl 2 Solution 1ml, 0.5mol / L polyethylene glycol solution 0.5ml, 1.5mol / L lithium hydroxide solution 1ml, mixed in an ice-water bath and continued to stir for 2 hours to obtain a white cloudy solution B.

[0020] [3] In the case of vigorous stirring, slowly add B solution to A, and continue to fully stir for 2 hours to form a mixed solution C.

[0021] [4] Take 0.5mol / L FeSO 4 Solution 10ml, the ferrous sulfate solution was quickly added to the mixed solution C, and stirred for 1min to form a dark green mixed solution D.

[0022] [5] After passing the mixed solution D into nitrogen, move it into the reaction kettle, react at 180°C for 16 hours, take samples after natural coolin...

Embodiment 2

[0024] The steps are the same as those in Example 1, except that the lithium source in [1] is LiCl.

Embodiment 3

[0026] The step is the same as that in Example 1, except that the lithium source in [1] is LiCH 3 COO.

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Abstract

The invention relates to a hydrothermal preparation method of a copper-doped zinc oxide composite lithium ferro phosphate (LFP) positive electrode material. The method comprises the following steps: firstly, respectively preparing a lithium phosphate colloidal solution and a copper-doped zinc oxide precursor solution, then mixing the lithium phosphate colloidal solution and the copper-doped zinc oxide precursor solution, uniformly stirring, adding a ferrous solution to form an LFP precursor solution, and transferring to a reaction kettle, wherein the reaction temperature is 100-350 DEG C, andthe reaction time is 3-30 hours; naturally cooling the sample, taking out, washing with a great amount of deionized water, drying at 80 DEG C so as to obtain the copper-doped zinc oxide composite LFPposition electrode material. The method comprises: performing the chemical reaction in the water solution or water vapor and the fluids at high temperature and high pressure so as to prepare the copper-doped zinc oxide composite LFP position electrode material. Compared with the method of producing LFP by virtue of a solid phase method, the hydrothermal preparation method has the advantages of simplicity in operation, uniform product phase, small product particle size and the like.

Description

technical field [0001] The invention relates to the field of new energy materials, in particular to a hydrothermal preparation method of a nanoscale copper-doped zinc oxide composite lithium iron phosphate cathode material. Background technique [0002] Lithium iron phosphate (LiFePO 4 ) can be used as a cathode material for lithium-ion batteries. This material has many significant advantages such as high theoretical capacity, good safety performance, environmental friendliness, wide range of raw material sources, and low raw material cost. However, this material also has obvious shortcomings such as low electronic and ion conductivity, which limits the commercial development of this material to a certain extent. Theory proves that doping a certain amount of metal cations in the lithium iron phosphate cathode material can significantly improve the electronic and ion conductivity of the material. Cu 2+ , Zn 2+ with Fe 2+ The ionic radius is similar, adding a small amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1397
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 李瑛姚俊刘聪舒佳武陈付祥齐金和胡业旻
Owner SHANGHAI UNIV
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