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A kind of preparation method of composite catalyst and its application in lithium-air battery

A lithium-air battery and composite material technology, which can be used in battery electrodes, fuel cell-type half-cells and secondary battery-type half-cells, circuits, etc. problem, to achieve the effect of improving cycle stability, improving particle size and shape, and uniform distribution

Active Publication Date: 2021-04-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the intrinsic low electrical conductivity and severe nanoparticle agglomeration of transition metal oxides play a severe limiting role in their ORR / OER catalytic activity.

Method used

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  • A kind of preparation method of composite catalyst and its application in lithium-air battery
  • A kind of preparation method of composite catalyst and its application in lithium-air battery
  • A kind of preparation method of composite catalyst and its application in lithium-air battery

Examples

Experimental program
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Effect test

Embodiment 1

[0079] First, weigh a certain amount of cetyltrimethylammonium bromide (19mmol), n-butanol, and n-octane (the molar ratio of the three is 1:10:57) and place them in two conical flasks. In, solutions A1 and A2 were obtained after sufficient ultrasonication and stirring; then 0.80mmol Zn(NO 3 ) 2 ·6H 2 O and 0.80mmol Ni(NO 3 ) 2 ·6H 2 O and 3.2mmol 2-methylimidazole were respectively placed in 560mmol deionized water (10mL), and solutions B and C were obtained after sufficient ultrasonication and stirring; subsequently, the configured solutions B and C were added dropwise under vigorous stirring into solutions A1 and A2, stirred until clear and transparent, and left the 2-group mixture at room temperature overnight; finally, the Zn(NO 3 ) 2 ·6H 2 O and Ni(NO 3 ) 2 ·6H 2 The transparent microemulsion of O is quickly added to the transparent microemulsion containing 2-methylimidazole, under stirring conditions (room temperature conditions, such as 20 ~ 40 ° C, unless oth...

Embodiment 2

[0083] Compared with Example 1, the difference is mainly that the cetyltrimethylammonium bromide molar weight in the oil phase is 21mmol, specifically:

[0084] First, weigh a certain amount of cetyltrimethylammonium bromide (21mmol), n-butanol, and n-octane (the molar ratio of the three is 1:10:57) and place them in two conical flasks. In, solutions A1 and A2 were obtained after sufficient ultrasonication and stirring; then 0.80mmol Zn(NO 3 ) 2 ·6H 2 O and 0.80mmol Ni(NO 3 ) 2 ·6H 2 O and 3.2mmol 2-methylimidazole were respectively placed in 560mmol deionized water (10mL), and solutions B and C were obtained after sufficient ultrasonication and stirring; subsequently, the configured solutions B and C were added dropwise under vigorous stirring into solutions A1 and A2, stirred until clear and transparent, and left the 2-group mixture at room temperature overnight; finally, the Zn(NO 3 ) 2 ·6H 2 O and Ni(NO 3 ) 2 ·6H 2 The transparent microemulsion of O was quickly ...

Embodiment 3

[0088] Compared with Example 1, the difference is mainly that the cetyltrimethylammonium bromide molar weight in the oil phase is 23mmol, specifically:

[0089] First, weigh a certain amount of cetyltrimethylammonium bromide (23mmol), n-butanol, and n-octane (the molar ratio of the three is 1:10:57) and place them in two Erlenmeyer flasks. In, solutions A1 and A2 were obtained after sufficient ultrasonication and stirring; then 0.80mmol Zn(NO 3 ) 2 ·6H 2 O and 0.80mmol Ni(NO 3 ) 2 ·6H 2 O and 3.2mmol 2-methylimidazole were respectively placed in 560mmol deionized water (10mL), and solutions B and C were obtained after sufficient ultrasonication and stirring; subsequently, the configured solutions B and C were added dropwise under vigorous stirring into solutions A1 and A2, stirred until clear and transparent, and left the 2-group mixture at room temperature overnight; finally, the Zn(NO 3 ) 2 ·6H 2 O and Ni(NO 3 ) 2 ·6H 2 The transparent microemulsion of O was quick...

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Abstract

The invention belongs to the technical field of lithium-air batteries, and specifically discloses an octahedral Ni-N-C composite material and a preparation method thereof for an inverse microemulsion. The Ni-N-C composite material prepared by the method of the invention has a low overpotential when used as a lithium-air battery catalyst material, and its preparation method is simple and has good prospects.

Description

technical field [0001] The invention relates to the field of battery material preparation, in particular to a catalyst material for a lithium-air battery. Background technique [0002] Due to the theoretical energy density of lithium-air batteries as high as 11700Wh kg -1 , which has become one of the most attractive high energy density secondary batteries. However, in practical applications, lithium-air batteries face problems such as serious polarization during charging and discharging, poor power performance, and insufficient cycle performance. Catalyst materials, that is, cathode materials, are an important part of lithium-air batteries, which can effectively promote the reaction kinetics of lithium-air battery electrodes. Solving the above problems is the key to the large-scale application of lithium-air batteries. Noble metal catalysts have excellent catalytic performance, but their large-scale application is difficult due to their high cost and resource shortage. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88H01M4/86H01M12/08B82Y30/00
CPCB82Y30/00H01M4/8652H01M4/8673H01M4/8825H01M4/8828H01M4/9041H01M4/9083H01M12/08H01M2004/8689
Inventor 张治安李天伟李红中赖延清张凯李劼
Owner CENT SOUTH UNIV