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A kind of ternary cathode material for NCF type thermal battery and preparation method thereof

A cathode material and thermal battery technology, applied in the field of material chemistry, can solve the problems of no obvious improvement in performance and reports have not yet appeared, and achieve the effects of single component, improved cathode utilization rate, and improved performance

Active Publication Date: 2022-04-12
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The atomic structure of Ni is similar to that of Fe and Co, so NiS 2 As a positive electrode material, it has also attracted the attention of thermal battery researchers, usually NiS 2 The cathode material is artificially prepared, and its performance is comparable to that of FeS 2 and CoS 2 When used as a single positive electrode, the ratio is not significantly improved, so it is still in the stage of experimental research
The research on ternary or multi-component composite materials is relatively rare, especially NiS which is completely theoretically feasible. 2 , FeS 2 and CoS 2 The report of the base ternary composite cathode material has not yet appeared

Method used

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  • A kind of ternary cathode material for NCF type thermal battery and preparation method thereof
  • A kind of ternary cathode material for NCF type thermal battery and preparation method thereof
  • A kind of ternary cathode material for NCF type thermal battery and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] The weight ratio of target product NCF type ternary positive electrode material component for heat battery is: Ni 0.1 co 0.45 Fe 0.45 S 2 Accounted for 80%, Li 2O accounts for 5%, and the LiF-LiCl-LiBr electrolyte accounts for 15%. First, weigh NiSO according to the stoichiometric ratio 4 ·6H 2 O. CoSO 4 ·7H 2 O and FeSO 4 ·7H 2 O, configured as a solution with a total metal ion content of 1mol / L; slowly add 0.5mol / L (NH 4 ) 2 C 2 o 4 Solution to pH 12, stirred and aged for 2 hours, aged at room temperature, filtered, washed and dried to obtain the precursor, the drying temperature was 80°C; Reduction in the atmosphere, the reduction temperature is 600 ° C, the reduction time is 12 hours, after the reduction is completed, cool to room temperature and reheat to 120 ° C, and keep warm for 12 hours for passivation treatment; then put the metal powder in the atmosphere protection furnace, add excess Sulfur powder, carry out solid-phase reaction in an argon atm...

Embodiment 2

[0041] The weight ratio of target product NCF type ternary positive electrode material component for heat battery is: Ni 0.1 co 0.45 Fe 0.45 S 2 Accounted for 80%, Li 2 O accounts for 5%, and the LiF-LiCl-LiBr electrolyte accounts for 15%. First, weigh NiSO according to the stoichiometric ratio 4 ·6H 2 O. CoSO 4 ·7H 2 O and FeSO 4 ·7H 2 O, configured as a solution with a total metal ion content of 2mol / L; slowly add 0.5mol / L (NH 4 ) 2 C 2 o 4 Solution until the pH value is 13, stir and age for 12 hours, the aging temperature is 50 ° C, filter, wash the precursor and dry to obtain the precursor, the drying temperature is 120 ° C; the precursor is placed in a tubular reduction furnace, in Reduction in a hydrogen atmosphere, the reduction temperature is 700°C, and the reduction time is 6h. After the reduction is completed, cool to room temperature and reheat to 200°C, and keep warm for 6h for passivation treatment; then put the metal powder in the atmosphere protecti...

Embodiment 3

[0043] The weight ratio of target product NCF type ternary positive electrode material component for heat battery is: Ni 0.1 co 0.45 Fe 0.45 S 2 Accounted for 80%, Li 2 O accounts for 5%, and the LiF-LiCl-LiBr electrolyte accounts for 15%. First, weigh NiSO according to the stoichiometric ratio 4 ·6H 2 O. CoSO 4 ·7H 2 O and FeSO 4 ·7H 2 O, configured as a solution with a total metal ion content of 1mol / L; slowly add 0.5mol / L (NH 4 ) 2 C 2 o 4 Solution to pH 12, stirred and aged for 6 hours, aged at room temperature, filtered, washed and dried to obtain the precursor, the drying temperature was 110°C; the precursor was placed in a tubular reduction furnace, under hydrogen Reduction in the atmosphere, the reduction temperature is 650 ° C, the reduction time is 8 hours, after the reduction is completed, cool to room temperature and then reheat to 150 ° C, and keep warm for 8 hours for passivation treatment; then put the metal powder in the atmosphere protection furna...

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Abstract

The invention relates to a ternary cathode material for an NCF thermal battery and a preparation method thereof, belonging to the technical field of material chemistry. The object of the present invention is to provide a kind of NCF type thermal battery ternary positive electrode material and preparation method thereof, prepare M(C 2 o 4 )·nH 2 O(M:Ni, Co, Fe) solid solution precursor, and then through the high-pressure hydrogen reduction-sulfur steam vulcanization method, the cubic phase Ni can be obtained 0.1 co 0.45 Fe 0.45 S 2 Ternary cathode materials for thermal batteries. By adopting the preparation method provided by the invention, the obtained ternary cathode material has the characteristics of complete crystal structure, low self-loss rate, high capacity utilization rate and the like.

Description

technical field [0001] The invention relates to a ternary cathode material for an NCF thermal battery and a preparation method thereof, belonging to the technical field of material chemistry. Background technique [0002] MS 2 (M=Fe, Co) is currently the most widely used cathode material for thermal batteries, among which FeS 2 The electrode potential of the Li negative electrode is 2.2V, the theoretical capacity is 1206As / g, and the thermal decomposition temperature is 550°C, while CoS 2 The electrode potential is 2.1V, the theoretical capacity is 1045As / g, and the thermal decomposition temperature is 650°C. The difference in the performance of the two cathode materials leads to slightly different application directions. With the continuous development of the thermal battery technology on the bomb, the working time of the thermal battery is continuously extended. The disadvantage of low utilization of traditional cathode materials makes it difficult to meet the use requir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/62H01M6/36
CPCH01M4/5815H01M4/62H01M6/36H01M2004/028
Inventor 张维义迟亮强杉杉刘凯特郑侠姜义田于金玉罗重霄
Owner SHANGHAI INST OF SPACE POWER SOURCES
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