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Negative electrode material of lithium-iron sulfide lithium-ion battery and preparation method

A cathode material, lithium iron sulfide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of single energy storage form, short service life, single cathode material structure, etc., achieve long cycle life, reduce resistance polarization , the effect of structural stability

Inactive Publication Date: 2017-05-10
ANHUI GUOWEI ELECTRIC VEHICLE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing cathode materials have a single structure and a single energy storage form, which cannot form a good match with the lithium-ion iron sulfide battery to maximize the performance of the lithium-ion iron sulfide battery, and the service life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A lithium-iron sulfide lithium battery cathode material, the cathode material is composed of the following raw materials in parts by weight.

[0027] 18 parts of graphite, 0.5 parts of platinum powder, 0.3 parts of silicon carbide, 0.3 parts of titanium dioxide, 0.6 parts of iron oxide, 0.7 parts of aluminum powder, 0.3 parts of silicon dioxide, 0.5 parts of ferrous sulfate, and 0.2 parts of zinc powder.

Embodiment 2

[0029] A lithium-iron sulfide lithium battery cathode material, the cathode material is composed of the following raw materials in parts by weight.

[0030] 19 parts of graphite, 0.6 parts of platinum powder, 0.5 parts of silicon carbide, 0.4 parts of titanium dioxide, 0.8 parts of iron oxide, 0.8 parts of aluminum powder, 0.6 parts of silicon dioxide, 0.7 parts of ferrous sulfate, and 0.5 parts of zinc powder.

Embodiment 3

[0032] A lithium-iron sulfide lithium battery cathode material, the cathode material is composed of the following raw materials in parts by weight.

[0033] 20 parts of graphite, 0.8 parts of platinum powder, 0.7 parts of silicon carbide, 0.6 parts of titanium dioxide, 0.9 parts of iron oxide, 1.0 parts of aluminum powder, 0.8 parts of silicon dioxide, 0.8 parts of ferrous sulfate, and 0.7 parts of zinc powder.

[0034] The graphite is natural flake ink, microcrystalline graphite, artificial graphite or mesophase carbon microspheres.

[0035] The average particle size of the graphite particles is 25-30um.

[0036] A method for preparing a lithium-iron sulfide lithium battery cathode material, comprising the following steps:

[0037] (1) Mix the above raw materials evenly and add them into a high-speed pulverizer, and pulverize them at a speed of 2000 to 3000 rpm for 10 to 20 minutes to obtain a mixed powder;

[0038] (2) Add the mixed powder into a low-speed impact ball mill...

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PUM

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Abstract

The invention provides a negative electrode material of a lithium-iron sulfide lithium-ion battery and a preparation method. The negative electrode material is prepared from the following raw materials in parts by weight: 18-20 parts of graphite, 0.5-0.8 part of platinum powder, 0.3-0.7 part of silicon carbide, 0.3-0.6 part of titanium dioxide, 0.6-0.9 part of ferric oxide, 0.7-1.0 part of aluminum powder, 0.3-0.8 part of silicon dioxide, 0.5-0.8 part of ferrous sulfate and 0.2-0.7 part of zinc powder. Through doping metal elements into the prepared negative electrode material, the resistance polarization of the material under high-rate charge and discharge can be effectively reduced, the material and the iron sulfide lithium-ion battery are well matched, and the prepared electrode material is stable in structure and longer in cycle life.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium-iron sulfide lithium battery cathode material and a preparation method. Background technique [0002] Based on lithium-ion iron sulfide, lithium-ion iron sulfide batteries have many advantages that existing battery chemistries do not have. Charging is faster. Compared with standard lithium batteries, the new battery exhibits about 1.6 times the energy density of standard lithium batteries (which will extend the range of plug-in power), and 50% higher power density than standard lithium batteries (which makes hybrid faster charging and discharging). [0003] However, the existing cathode material has a single structure and a single energy storage form, which cannot form a good match with the lithium-ion iron sulfide battery to maximize the performance of the lithium-ion iron sulfide battery, and has a short service life. Contents of the invention [0004] In order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/136H01M4/1397H01M4/58
CPCH01M4/136H01M4/1397H01M4/5815Y02E60/10
Inventor 邓衍虎杨丛利邓威
Owner ANHUI GUOWEI ELECTRIC VEHICLE MFG CO LTD
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