Nickel cobalt iron hydroxide coated nickel cobaltate flexible electrode material and preparation and application thereof

A hydroxide and flexible electrode technology, applied in the direction of fuel cell half-cells and primary battery half-cells, battery electrodes, circuits, etc., to save time and resources, high cycle stability, and considerable charge-discharge specific capacity Effect

Inactive Publication Date: 2020-05-22
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of high-performance flexible air electrodes is still a big challenge.

Method used

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  • Nickel cobalt iron hydroxide coated nickel cobaltate flexible electrode material and preparation and application thereof
  • Nickel cobalt iron hydroxide coated nickel cobaltate flexible electrode material and preparation and application thereof
  • Nickel cobalt iron hydroxide coated nickel cobaltate flexible electrode material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation method of nickel cobalt oxide flexible electrode material coated with nickel cobalt iron hydroxide in this embodiment, the specific preparation steps are as follows:

[0049] (1) Preparation of nickel cobaltate electrode: ultrasonically dissolve 1.8g nickel nitrate, 3.6g cobalt nitrate, and 4.5g urea in a mixed solution of 110ml ethanol and 110ml deionized water to obtain a uniform pink solution; take 35ml pink mixed solution and pour Put it into a reaction kettle with a capacity of 50ml, carbon cloth (2*5cm 2 ) suspended in pink liquid, reacted with solvent heat at 100°C for 12 hours, cooled to room temperature after the reaction, took out the carbon cloth, and the pink substance was attached to the carbon cloth base, and was washed repeatedly with distilled water and ethanol until no free The precipitate was dried in an oven at 60°C; then, it was placed in a muffle furnace and calcined in an air atmosphere, rising from 0°C to a calcination temperature ...

Embodiment 2

[0056] The preparation method of nickel cobalt oxide flexible electrode material coated with nickel cobalt iron hydroxide in this embodiment, the specific preparation steps are as follows:

[0057] (1) Preparation of nickel cobaltate electrode: ultrasonically dissolve 1.8g nickel nitrate, 3.6g cobalt nitrate, and 4.5g urea in a mixed solution of 110ml ethanol and 110ml deionized water to obtain a uniform pink solution; take 35ml pink mixed solution and pour Put the carbon cloth into a reaction kettle with a capacity of 50ml, suspend the carbon cloth in the pink liquid, conduct a solvothermal reaction at 100°C for 12 hours, cool to room temperature after the reaction, take out the electrode, and attach the pink substance to the carbon cloth base Repeatedly rinse with ethanol until there is no free sediment on the surface of the sample, dry it in an oven at 60°C, and then put it into a muffle furnace for calcination in an air atmosphere, rise from 0°C to a calcination temperature...

Embodiment 3

[0062] The preparation method of nickel cobalt oxide flexible electrode material coated with nickel cobalt iron hydroxide in this embodiment, the specific preparation steps are as follows:

[0063] (1) Preparation of nickel cobaltate electrode: ultrasonically dissolve 1.8g nickel nitrate, 3.6g cobalt nitrate, and 4.5g urea in a mixed solution of 110ml ethanol and 110ml deionized water to obtain a uniform pink solution; take 35ml pink mixed solution and pour Put the carbon cloth into a reaction kettle with a capacity of 50ml, suspend the carbon cloth in the pink liquid, and conduct a solvothermal reaction at 100°C for 12 hours. After the reaction, cool to room temperature, take out the electrode, and the pink substance is attached to the surface, and repeat it with distilled water and ethanol. Rinse until there is no free precipitate on the surface of the sample, dry it in an oven at 60°C, and then put it into a muffle furnace for calcination in an air atmosphere. Rise from 0°C ...

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Abstract

The invention belongs to the field of zinc-air battery air electrode materials, and discloses a nickel cobalt iron hydroxide coated nickel cobaltate flexible electrode material and preparation and application thereof. The preparation method comprises the following steps: performing in-situ solvothermal growth and air calcination on a conductive substrate to obtain a nickel cobaltate nano array, and performing solvothermal deposition on nickel cobalt iron hydroxide on the surface of the nickel cobaltate nano array by using soluble salts of three transition metals including nickel, cobalt and iron to obtain the nickel cobaltate flexible electrode material coated with the nickel cobalt iron hydroxide. According to the nickel cobalt iron hydroxide coated nickel cobaltate flexible electrode material disclosed by the invention, ion transmission and electrolyte diffusion are promoted by utilizing a three-dimensional porous network structure; the nickel cobaltate nanowire and the nickel-cobalt-iron hydroxide shell layer are combined to increase the number of active specific surfaces and active sites, so that the composite electrode material has excellent oxygen evolution reaction and oxygen reduction reaction performance, and high specific discharge capacity, high energy density and outstanding cycling stability are realized when the composite electrode material is applied to a rechargeable zinc-air battery.

Description

technical field [0001] The invention belongs to the field of air electrode materials for zinc-air batteries, and in particular relates to a nickel cobaltate flexible electrode material coated with nickel cobalt iron hydroxide and its preparation and application. Background technique [0002] The current increasing energy demand leads to the rapid consumption of fossil fuels, which further intensifies energy and environmental problems. As a developing country with coal as its main energy structure, China's environmental problems are particularly prominent. The dual pressures from energy and the environment drive people to seek clean renewable energy and new energy storage and conversion methods. Among many energy storage and conversion technologies, electrochemical energy conversion and storage technologies (mainly including lithium-ion batteries, metal-air batteries, fuel cells, supercapacitors, etc.) have been widely recognized and are currently the most feasible and effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86H01M4/90H01M12/06
CPCH01M4/8652H01M4/8882H01M4/9016H01M12/06Y02E60/10
Inventor 蔡欣李思梦方岳平
Owner SOUTH CHINA AGRI UNIV
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