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Preparation of Prussian blue derivative catalyst applied to zinc air battery

A catalyst and preparation process technology, applied in the fields of nanomaterials and electrocatalysis, can solve the problems of low catalytic performance and slow conductivity.

Pending Publication Date: 2021-09-24
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, the catalytic performance of transition metal-based LDHs is still limited by their low electrical conductivity and slow oxygen reduction process.

Method used

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  • Preparation of Prussian blue derivative catalyst applied to zinc air battery
  • Preparation of Prussian blue derivative catalyst applied to zinc air battery
  • Preparation of Prussian blue derivative catalyst applied to zinc air battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] (1) Dissolve 0.328g of nickel dichloride hexahydrate, 0.178g of ammonium fluoride and 0.364g of urea in 25mL of deionized water, stir for 15 minutes with magnetic force, then transfer the above-mentioned mixed solution to a 40mL reaction kettle, and heat React for 12 hours. After the reaction, the obtained product was centrifuged three times with deionized water and absolute ethanol, and dried in an oven at 60° C. for 12 hours. Then above-mentioned 0.1g product is dissolved in potassium cobalt cyanide solution, and magnetic force is stirred for 12 hours, and after the reaction finishes, the obtained product is centrifuged and rinsed 3 times with deionized water and absolute ethanol respectively, and dried in an oven at 60° C. for 12 hours, namely Available Ni(OH) 2 / NiCoPBA product.

[0020] (2) Electrode production process:

[0021] Weigh 2 mg Ni(OH) 2 / NiCoPBA catalyst material, 2 mg of acetylene black and 5 μl of Nafion were dissolved in 500 μl of isopropanol, ul...

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Abstract

The invention belongs to the field of nano materials and electro-catalysis, and particularly relates to preparation of a Prussian blue derivative catalyst applied to a zinc air battery. A rod-like nickel hydroxide substrate is synthesized through a simple hydrothermal method, and then nickel hydroxide is used as the substrate for further hydrothermal synthesis to obtain a final product, namely the nickel hydroxide / nickel-cobalt Prussian blue derivative material. When the nickel hydroxide / nickel cobalt Prussian blue derivative is used as an electrocatalyst, the catalyst is subjected to an oxygen evolution / oxygen reduction performance test in a 0.1 M alkaline potassium hydroxide solution, the nickel hydroxide / nickel cobalt Prussian blue derivative catalyst material has lower OER overpotential (310mV) than a noble metal catalyst, the assembled zinc air battery can be stably cycled for a long time (500 circles), and the catalyst has characteristics that the catalyst is simple in preparation process, raw materials are rich and cheap, the synthesis period is extremely short, and the yield is high.

Description

technical field [0001] The invention belongs to the field of nanomaterials and electrocatalysis, and specifically relates to the preparation of a Prussian blue derivative catalyst applied to zinc-air batteries, not only that, but flexible batteries can also be assembled based on the catalyst, which can be applied to some wearable electronic products. Background technique [0002] Among various electrochemical energy storage and conversion systems, Zn-air batteries have been extensively studied in recent years due to their high theoretical energy and power densities, proven safety, and economic feasibility. To develop portable Zn-air batteries with high performance, it is particularly important to realize air cathode materials with excellent bifunctional oxygen reactivity, strong alkali resistance, flexibility, and ductility. Among all highly active catalysts, they show low overpotential and excellent stability, but insufficient bifunctional catalytic performance and high cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/86H01M4/88
CPCH01M4/90H01M4/8647H01M4/88Y02E60/50
Inventor 李光达张广辉赵凌雪
Owner QILU UNIV OF TECH