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Anode material and anode plate of lithium-iron disulfide battery and method for preparing same

A technology for iron disulfide batteries and positive electrode materials, which is applied in iron sulfide, electrode manufacturing, battery electrodes, etc. It can solve the problems of poor voltage platform and high-current discharge performance, high battery open circuit voltage, and high processing costs, and achieve a stable voltage platform. , Improve electrical conductivity and good dispersion

Inactive Publication Date: 2009-09-02
广州市天球实业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purity of iron disulfide contained in the pyrite processed by this method is only 97.8%, and the battery prepared by it still has the problems of high open circuit voltage, poor voltage platform and high-current discharge performance
Moreover, it adopts high-temperature treatment, which takes a long time, consumes a lot of energy, and has high processing costs, making it difficult to industrialize.

Method used

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  • Anode material and anode plate of lithium-iron disulfide battery and method for preparing same
  • Anode material and anode plate of lithium-iron disulfide battery and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: Preparation of iron disulfide nanocrystals

[0038] 150ml concentration is 4mol / L FeSO 4 After stirring the aqueous ethanol solution, add dropwise the solution containing 150ml concentration of 8mol / L (NH 2 ) 2 CS and 5ml of PVP in ethanol aqueous solution, then add 6g of high-purity sulfur powder, mix thoroughly, and adjust the pH value to 7-8 with sulfuric acid aqueous solution of pH=1.0. After continuing to stir, put the mixed solution in a high-pressure reactor, add a certain amount of ethanol until the volume is above 95%, then seal the reactor, keep it warm at 200°C for 36 hours, filter, and use Carbon disulfide, deionized water, absolute ethanol and dilute sulfuric acid were repeatedly washed several times to remove excess sulfur, dried and dehydrated, and ground to obtain iron disulfide nanocrystals.

Embodiment 2

[0039] Example 2: Preparation of iron disulfide nanocrystals

[0040] 150ml concentration is 4mol / L FeSO 4 After stirring the aqueous ethanol solution, add dropwise the solution containing 150ml concentration of 8mol / L (NH 2 ) 2 CS and 5ml of PVP in ethanol aqueous solution, then add 6g of high-purity sulfur powder, mix thoroughly, and adjust the pH value to 5-6 with pH=12 sodium hydroxide aqueous solution. After continuing to stir, put the mixed solution in a high-pressure reactor, add a certain amount of ethanol until the volume is above 95%, then seal the reactor, keep it warm at 200°C for 36 hours, filter, and use Carbon disulfide, deionized water, absolute ethanol and dilute sulfuric acid were repeatedly washed several times to remove excess sulfur, dried and dehydrated, and ground to obtain iron disulfide nanocrystals.

Embodiment 3

[0042] Take the iron disulfide nanocrystals of Example 1 or Example 2 to prepare a positive electrode sheet for a lithium-iron disulfide battery.

[0043] Get the iron disulfide nanocrystal 45g that makes, add 1.2g polyaniline (PANi) and 1.2g carbon nanotube, 2.5gAl 2 o 3 Metal oxides are mixed to obtain positive electrode materials.

[0044] Disperse the positive electrode material in absolute ethanol, the mass ratio of the positive electrode material to absolute ethanol is 1:1, ball mill in a ball mill for 3 hours to further refine it, and then dry it under vacuum at a temperature of 60°C cooling to room temperature, placing it in a ball mill for ball milling for 3 hours; and then passing through a vibrating sieve with a mesh size of 300 or more to obtain the processed positive electrode material.

[0045] Add 5 g of a mixture of glass fiber and metal copper powder into the treated positive electrode material as a metal binder, stir with an electric mixer for 2 hours, and ...

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PUM

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Abstract

The invention discloses an anode material and an anode plate of a lithium-iron disulfide battery and a method for preparing the same, wherein the anode material comprises iron disulfide which is an iron disulfide nanometer crystal, and FeSO4, (NH2)2CS and S taken as reaction raw materials and PVP taken as a dispersing agent react under the acid or alkali condition to prepare the iron disulfide. The obtained iron disulfide is an N-shaped crystal, of which the purity is as high as 100 percent; compared with the iron disulfide used in the prior art, the iron disulfide of the invention can greatly reduce the open circuit voltage of the lithium-iron disulfide battery, make the voltage platform more stable, improve the conductive activity of the battery, improve the discharging performance of heavy current, improve the discharging depth of the battery and make the lithium-iron disulfide battery have higher actual values.

Description

technical field [0001] The invention belongs to the field of lithium battery materials, and in particular relates to a lithium-iron disulfide battery cathode material. The invention also relates to using the lithium-iron disulfide battery material to prepare a lithium-iron disulfide battery cathode sheet and a preparation method. Background technique [0002] Lithium-iron disulfide battery is a high-energy and environmentally friendly primary lithium battery. It has achieved great development in recent years. It has the following characteristics: the working voltage of the battery is 1.5V, which can be used interchangeably with any 1.5V battery; the discharge voltage is stable and safe Excellent performance; low natural discharge rate, long storage life, good storage performance, storage time can reach 5 to 10 years; light weight, 2 / 3 of the alkaline manganese battery; the battery is mercury-free, cadmium-free, and lead-free, and is truly green Environmentally friendly; good...

Claims

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Application Information

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IPC IPC(8): H01M4/58C01G49/12H01M4/02H01M4/04
CPCY02E60/12Y02E60/10
Inventor 李军黄天候金海
Owner 广州市天球实业有限公司
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