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Preparation method for spherical mesoporous lithium iron phosphate anode material

A technology of mesoporous lithium iron phosphate and cathode material, which is applied in battery electrodes, electrical components, circuits, etc., to achieve the effect of simple process flow and great application prospects

Inactive Publication Date: 2013-01-09
ZHEJIANG ZHENHUA NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lithium iron phosphate powder materials composed of spherical particles are rarely reported, especially the preparation method of a spherical mesoporous lithium iron phosphate cathode material has not been reported before.

Method used

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  • Preparation method for spherical mesoporous lithium iron phosphate anode material

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Embodiment 1

[0028]Weigh lithium carbonate, ferrous oxalate, triammonium phosphate, citric acid and cetyltrimethylammonium phosphate according to molar ratio Li:Fe:P:reducing agent:surfactant=1:0.9:0.9:0.01:0.01 , weigh CMK-3 according to the mass ratio Fe: ordered mesoporous carbon = 1:0.1, and mix it in deionized water to form a mixed solution with a Fe concentration of 3mol / L, and then put the mixed solution in N2 atmosphere, Reaction at 200°C for 30h, the resulting product was filtered and dried at 80°C for 24h, and the obtained spherical nano-lithium iron phosphate precursor was kept at 500°C for 16h in an N2 atmosphere to obtain a spherical mesoporous lithium iron phosphate cathode material. Denoted as LiFePO4-1.

Embodiment 2

[0030] Weigh lithium formate, ferrous acetate, ammonium dihydrogen phosphate, formaldehyde and cetyltriethylammonium phosphate according to molar ratio Li: Fe: P: reducing agent: surfactant = 1: 1.1: 1.1: 0.03: 0.03 , weigh C-MTS-9 according to the mass ratio Fe: ordered mesoporous carbon = 1:0.2, and mix it in deionized water to form a mixed solution with a Fe concentration of 0.5mol / L, and then put the mixed solution in Ar In the atmosphere, react at 350 ° C for 15 h, and the obtained product is filtered and dried at 200 ° C for 2 h. Lithium cathode material, denoted as LiFePO4-2.

Embodiment 3

[0032] Weigh lithium hydroxide, ferrous carbonate, diammonium hydrogen phosphate, ethylene glycol and cetyltrimethyl by molar ratio Li:Fe:P:reducing agent:surfactant=1:0.9:1.1:0.01:0.03 Ammonium bromide, weigh CMK-3 according to the mass ratio Fe:ordered mesoporous carbon=1:0.2, and mix it in deionized water to form a mixed solution with a Fe concentration of 0.5mol / L, and then put the mixed solution in In a He atmosphere, react at 200°C for 30h, and the obtained product is filtered and dried at 80°C for 24h. The obtained spherical mesoporous lithium iron phosphate precursor is in a He atmosphere, and after a constant temperature of 500°C for 16h, a spherical mesoporous phosphoric acid is obtained. Lithium iron cathode material, denoted as LiFePO4-3.

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Abstract

The invention belongs to the technical field of energy material lithium battery and particularly relates to a preparation method for a spherical mesoporous lithium iron phosphate anode material. The preparation method provided by the invention comprises the following steps: (1), weighing lithium source compound, iron source compound, phosphrous source compound, a reducing agent, surfactant and ordered mesoporous carbon, and mixing in deionized water to form a mixed liquor; (2) carrying out reactoin on the mixed liquor obtained in the step (1) under protective atmosphere, and filtering and drying reaction product to obtain a spherical mesoporous lithium iron phosphate precursor; and (3), keeping the spherical mesoporous lithium iron phosphate precursor obtained in the step (2) under a temperature range of 500-700DEG C for 8-16h under the protective atmosphere to obtain the spherical mesoporous lithium iron phosphate anode material. The technological process for preparing the spherical mesophorous lithium iron phosphate anode material provided by the invention is simple and has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of energy material lithium batteries, in particular to a preparation method of a spherical mesoporous lithium iron phosphate cathode material. Background technique [0002] With the excessive consumption of fossil energy, the search for clean, efficient, green, and renewable energy has attracted worldwide attention, and batteries are an important medium for rational use of these new energy sources. Lithium-ion battery is a new generation of green high-energy battery. It has many advantages such as high voltage, high energy density, good cycle performance, small self-discharge, no memory effect, and wide operating temperature range. It is widely used in mobile phones, notebook computers, UPS, Camcorders, various portable electric tools, electronic instruments, armed equipment, etc. also have good application prospects in electric vehicles, and are considered to be high-tech products that are of great signific...

Claims

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Application Information

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IPC IPC(8): H01M4/58
CPCY02E60/12Y02E60/10
Inventor 盛振郭存霞季宗备刘寒露孔立群缪兆盛
Owner ZHEJIANG ZHENHUA NEW ENERGY TECH
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