Anode material of lithium-iron disulfide battery

A lithium iron disulfide, iron disulfide technology, applied in battery electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems of poor voltage platform and high current discharge performance, complicated and cumbersome processes, and high open circuit voltage, and achieve conduction. The effect of small distance, increased specific surface area, and reduced open circuit voltage

Active Publication Date: 2017-06-27
LIUZHOU HAOXIANGTE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The positive electrode material of lithium-iron disulfide battery, iron disulfide, is usually separated and purified from pyrite. The battery assembled with the newly obtained iron disulfide as a material has a high open circuit voltage, poor voltage platform and high-current discharge performance. , in order to improve the voltage platform and discharge performance, it is necessary to modif

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A lithium-iron disulfide lithium battery cathode material, comprising:

[0026] A positive electrode active material, the positive electrode active material is iron disulfide doped with 2% titanium oxide, 4% magnesium oxide and 6% copper oxide in mass percentage, and the preparation method of the positive electrode active material is specifically:

[0027]a) Divide the iron disulfide separated and purified from pyrite into three equal parts, and put the three equal parts of iron disulfide into electric heating constant temperature blast drying ovens with temperatures of 250°C, 300°C and 380°C respectively After storing for 24 hours, take it out and cool to room temperature to obtain the first part of heat-treated iron disulfide, the second part of heat-treated iron disulfide and the third part of heat-treated iron disulfide, during which nitrogen gas is introduced into the three drying boxes;

[0028] b) Disperse the first heat-treated iron disulfide in absolute ethanol...

Embodiment 2

[0037] A lithium-iron disulfide lithium battery cathode material, comprising:

[0038] A positive electrode active material, the positive electrode active material is iron disulfide doped with 2% titanium oxide, 4% magnesium oxide and 6% copper oxide in mass percentage, and the preparation method of the positive electrode active material is specifically:

[0039] a) Divide the iron disulfide separated and purified from pyrite into three equal parts, and put the three equal parts of iron disulfide into electric heating constant temperature blast drying ovens with temperatures of 250°C, 300°C and 380°C respectively After storing for 24 hours, take it out and cool to room temperature to obtain the first part of heat-treated iron disulfide, the second part of heat-treated iron disulfide and the third part of heat-treated iron disulfide, during which nitrogen gas is introduced into the three drying boxes;

[0040] b) Disperse the first heat-treated iron disulfide in absolute ethano...

Embodiment 3

[0049] A lithium-iron disulfide lithium battery cathode material, comprising:

[0050] A positive electrode active material, the positive electrode active material is iron disulfide doped with 2% titanium oxide, 4% magnesium oxide and 6% copper oxide in mass percentage, and the preparation method of the positive electrode active material is specifically:

[0051] a) Divide the iron disulfide separated and purified from pyrite into three equal parts, and put the three equal parts of iron disulfide into electric heating constant temperature blast drying ovens with temperatures of 250°C, 300°C and 380°C respectively After storing for 24 hours, take it out and cool to room temperature to obtain the first part of heat-treated iron disulfide, the second part of heat-treated iron disulfide and the third part of heat-treated iron disulfide, during which nitrogen gas is introduced into the three drying boxes;

[0052] b) Disperse the first portion of heat-treated iron disulfide in abso...

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PUM

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Abstract

The invention discloses an anode material of a lithium-iron disulfide battery. The anode material comprises a modified iron disulfide anode active material which is iron disulfide doped with, by mass, 2% of titanium oxide, 4% of magnesium oxide and 6% of copper oxide. A preparation method of the anode active material specifically includes a) preparing first heat-treated iron disulfide, second heat-treated iron disulfide and third heat-treated iron disulfide; b) preparing first cladding iron disulfide, second cladding iron disulfide and third cladding iron disulfide; c) uniformly mixing the first cladding iron disulfide, the second cladding iron disulfide and the third cladding iron disulfide so as to obtain the anode material of the lithium-iron disulfide battery. The anode material of the lithium-iron disulfide battery has the advantages that open-circuit voltage of the battery can be reduced, so that a voltage platform is steadier; a composite electrically-conductive agent is added into the anode material, and accordingly electric conductivity can be improved greatly, battery polarization is reduced, high-and-low-temperature performance of the battery is enhanced and service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium battery materials. More specifically, the present invention relates to a lithium-iron disulfide lithium battery cathode material obtained by adding modified iron disulfide. Background technique [0002] The lithium-iron disulfide battery is a high-energy and environmentally friendly primary battery with iron disulfide as the positive electrode active material and lithium ions as the negative electrode active material. It has many advantages that traditional primary batteries cannot match: high and stable discharge voltage; large discharge capacity; High specific power, large discharge current; the lightest weight among the battery products of the same type; wide operating temperature range; good high temperature storage performance; good leak-proof performance; long storage life; Lead is a green, safe and reliable new energy storage device. Because of its excellent performance, lithium-iron disu...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/62H01M10/052
CPCH01M4/5815H01M4/62H01M4/621H01M4/625H01M10/052Y02E60/10
Inventor 易鉴荣唐臻林荔珊
Owner LIUZHOU HAOXIANGTE SCI & TECH
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