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A kind of preparation method of core-shell composite sulfide material

A compound type, sulfide technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems that cannot be completely eliminated, and achieve the effects of improved discharge voltage platform characteristics, increased room temperature conductivity, and simple preparation methods

Active Publication Date: 2020-11-03
富电新材料(佛山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the inherent disadvantages brought about by iron disulfide cannot be completely eliminated.

Method used

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  • A kind of preparation method of core-shell composite sulfide material
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  • A kind of preparation method of core-shell composite sulfide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] CoCl 2 ·6H 2 O and Na 2 S 2 o 3 ·5H 2 15g (CoCl 2 ·6H 2 O and Na 2 S 2 o 3 ·5H 2 O), then add an appropriate amount of deionized water, then add 28g FeS 2 Powder (5.6-9.2 microns), transfer the mixture to an autoclave, set the heating and heat preservation program: the heating rate is 12°C / min, the heat preservation time is 10h, and the heat preservation temperature is 140°C. After heat preservation, the samples were cooled to room temperature with the furnace. Will get CoS 2 Coated FeS 2 The intermediate product of the positive electrode material, and then add 9g of sulfur powder to the intermediate product, and place it in a nitrogen-protected reaction furnace. During the reaction, the heating rate is 10°C / min, and it is raised to 400°C for 10h. Then the temperature was raised to 500°C at 12°C / min and kept for 15h. Then cool down to room temperature with the furnace to get the product.

[0043] The thermal battery single battery is made of the core-she...

Embodiment 2

[0045] CoCl 2 ·6H 2 O and Na 2 S 2 o 3 ·5H 2 20g (CoCl 2 ·6H 2 O and Na 2 S 2 o 3 ·5H 2 O), then add an appropriate amount of deionized water, then add an appropriate amount of 28g FeS 2 Powder (5.6-9.2 microns), transfer the mixture to an autoclave, set the heating and heat preservation program: the heating rate is 12°C / min, the heat preservation time is 10h, and the heat preservation temperature is 100°C. After heat preservation, the samples were cooled to room temperature with the furnace. Will get CoS 2 Coated FeS 2 The intermediate product of the positive electrode material, and then add 9g of sulfur powder to the intermediate product, and place it in a nitrogen-protected reaction furnace. During the reaction, the heating rate is 10°C / min, and it is raised to 400°C for 10h. Then the temperature was raised to 500°C at 12°C / min and kept for 15h. Then cool down to room temperature with the furnace to get the product.

[0046] The thermal battery single batter...

Embodiment 3

[0048] CoCl 2 ·6H 2 O and Na 2 S 2 o 3 ·5H 2 23g (CoCl 2 ·6H 2 O and Na 2 S 2 o 3 ·5H 2 O), then add an appropriate amount of deionized water, then add an appropriate amount of 28g FeS 2 Powder (5.6-9.2 microns), transfer the mixture to an autoclave, set the heating and heat preservation program: the heating rate is 12°C / min, the heat preservation time is 10h, and the heat preservation temperature is 145°C. After heat preservation, the samples were cooled to room temperature with the furnace. Will get CoS 2 Coated FeS 2 The intermediate product of the positive electrode material, and then add 9g of sulfur powder to the intermediate product, and place it in a nitrogen-protected reaction furnace. During the reaction, the heating rate is 10°C / min, and it is raised to 400°C for 12h. Then the temperature was raised to 500°C at 10°C / min and kept for 20h. Then cool down to room temperature with the furnace to get the product.

[0049] The thermal battery single batter...

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Abstract

The invention relates to the field of manufacturing of hot-battery electrode materials, in particular to a preparation method of a nuclear shell composite sulfide material. The preparation method includes the steps: taking cobalt-containing solution as a raw material; adding a sulfur source and FeS2 powder into the cobalt-containing solution; stirring mixture; placing the mixture into a high-pressure reactor; performing reaction for at least 6 hours at the temperature of 100-180 DEG C; cooling a reactant; performing solid-liquid separation; mixing the acquired solid and elemental sulfur or directly heating the acquired solid and the elemental sulfur to reach the temperature of 410-500 DEG C in sulfur-containing atmosphere, and keeping the temperature for at least 10 hours; cooling mixturealong with a furnace to obtain the nuclear shell composite sulfide material. The preparation method is simple in process and low in cost, a prepared product has excellent electrochemical performance and safety, and large-scale industrial application is facilitated.

Description

technical field [0001] The invention relates to the field of manufacturing thermal battery electrode materials, in particular to a preparation method of a core-shell composite sulfide material. [0002] technical background [0003] Thermal battery is a special battery with molten salt as electrolyte. Thermal battery has the characteristics of high power density, high energy density, long storage time, rapid and reliable activation, suitable for various harsh working conditions, and simple and convenient use. Therefore, it is mainly used as a power source for high-tech weapons such as missiles, guided bombs, and torpedoes. In the civilian field, thermal batteries also have broad application prospects as emergency power supplies for aircraft, power supplies for underground high-temperature prospecting equipment, and fire alarm power supplies. The widely used cathode material is mainly natural pyrite iron disulfide (FeS 2 ). This material has moderate capacity, moderate disc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36
CPCH01M4/366Y02E60/10
Inventor 刘志坚宁慧龙黄海锋
Owner 富电新材料(佛山)有限公司
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