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A core-shell composite sulfide material

A compound type, sulfide technology, applied in the direction of delayed action cells, structural parts, electrical components, etc., can solve the problems that cannot be completely eliminated, and achieve the effect of improving discharge voltage platform characteristics, improving thermal stability, and increasing room temperature conductivity

Active Publication Date: 2020-11-27
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 core-shell composite sulfide material
  • A core-shell composite sulfide material
  • A core-shell composite sulfide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 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.

[0044] The thermal battery single battery is made of the core-she...

Embodiment 2

[0046] 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.

[0047] The thermal battery single batter...

Embodiment 3

[0049] 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.

[0050] The thermal battery single batter...

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Abstract

The invention relates to a core-shell composite sulfide material. The inner core of the core-shell composite sulfide material is iron disulfide, and the outer shell is cobalt disulfide. After the core-shell structure is formed, the heat stability of the material is remarkably improved; compared with pure iron disulfide, the thermal decomposition temperature is increased from 550 DEG C to 580-640 DEG C. Meanwhile, the conductivity of the material is remarkably improved; and compared with pure iron disulfide, the conductivity is multiplied. The core-shell composite material designed and preparedin the invention can be used as a positive electrode material of a thermal battery. When being used as the positive electrode material of the thermal battery, the product designed and provided by theinvention has the advantages of high thermal stability, electrochemical performance, chemical stability, effective capacity, power and the like.

Description

technical field [0001] The invention belongs to special chemical materials, in particular to a core-shell composite sulfide material. Background technique [0002] 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 discharge voltage and low price. The problem is that performance is rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M6/36
CPCH01M4/366H01M4/5815H01M6/36
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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