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A kind of nife-ldh/co-cnts nanocomposite material and its preparation method and application

A nanocomposite material and nanomaterial technology, applied in the field of NiFe-LDH/Co-CNTs nanocomposite material and its preparation, can solve the problems of insufficient zinc-air battery performance, high bifunctional activity, etc., and achieve high energy conversion efficiency and cycle The effect of stability, high bifunctional activity, and simple synthesis process

Active Publication Date: 2022-08-05
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the integrated electrode materials currently prepared cannot have high bifunctional activity, and the performance of the assembled Zn-air battery is insufficient.
The preparation of integrated air electrode materials with high bifunctional activity, high power density, and high stability for Zn-air batteries by a facile method has not been reported yet.

Method used

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  • A kind of nife-ldh/co-cnts nanocomposite material and its preparation method and application
  • A kind of nife-ldh/co-cnts nanocomposite material and its preparation method and application
  • A kind of nife-ldh/co-cnts nanocomposite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Treatment of carbon cloth (CC)

[0040] The carbon cloth was immersed in acetone solution and ultrasonically treated for 15 minutes. After ultrasonication, it was washed several times with absolute ethanol and deionized water, and then the carbon cloth was immersed in concentrated nitric acid (HNO). 3 ), stirred in a water bath at 60°C for 2 hours, and finally washed several times with absolute ethanol and deionized water, and set aside.

[0041] (2) Preparation of Co-ZIF / CC

[0042] 0.582g of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) was dissolved in 40 mL of deionized water, poured into 40 mL of deionized water in which 1.32 g of 2-methylimidazole (2-MIM) was dissolved, and after ultrasonically mixed at room temperature, the treated carbon cloth (CC) It was added to the formed purple solution and aged for 4 hours after complete immersion. The carbon cloth on which Co-ZIF was grown was taken out, rinsed with deionized water several times, and dried at 80 °C for 6 ho...

Embodiment 2

[0056] (1) Treatment of carbon cloth (CC)

[0057] The carbon cloth was immersed in acetone solution and ultrasonically treated for 15 minutes. After ultrasonication, it was washed several times with absolute ethanol and deionized water, and then the carbon cloth was immersed in concentrated nitric acid (HNO). 3 ), stirred in a water bath at 60°C for 2 hours, and finally washed several times with absolute ethanol and deionized water, and set aside.

[0058] (2) Preparation of Co-ZIF / CC

[0059] 0.582g of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) was dissolved in 40 mL of deionized water, poured into 40 mL of deionized water in which 1.32 g of 2-methylimidazole (2-MIM) was dissolved, and after ultrasonically mixed at room temperature, the treated carbon cloth (CC) It was added to the formed purple solution and aged for 4 hours after complete immersion. The carbon cloth on which Co-ZIF was grown was taken out, rinsed with deionized water several times, and dried at 80 °C for 6 ho...

Embodiment 3

[0065] (1) Treatment of carbon cloth (CC)

[0066] The carbon cloth was immersed in acetone solution and ultrasonically treated for 15 minutes. After ultrasonication, it was washed several times with absolute ethanol and deionized water, and then the carbon cloth was immersed in concentrated nitric acid (HNO). 3 ), stirred in a water bath at 60°C for 2 hours, and finally washed several times with absolute ethanol and deionized water, and set aside.

[0067] (2) Preparation of Co-ZIF / CC

[0068] 0.582g of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) was dissolved in 40 mL of deionized water, poured into 40 mL of deionized water in which 1.32 g of 2-methylimidazole (2-MIM) was dissolved, and after ultrasonically mixed at room temperature, the treated carbon cloth (CC) It was added to the formed purple solution and aged for 4 hours after complete immersion. The carbon cloth on which Co-ZIF was grown was taken out, rinsed with deionized water several times, and dried at 80 °C for 6 ho...

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Abstract

The invention relates to the technical field of preparation of air electrode materials for rechargeable zinc-air batteries, in particular to a NiFe-LDH / Co-CNTs nanocomposite material and a preparation method and application thereof. Co-ZIF nanosheets are obtained by using cobalt salt and 2-methylimidazole as reaction raw materials and carbon cloth as a substrate to obtain Co-CNTs / CC nanomaterials by carbonization; A thermal reaction was performed to obtain a NiFe-LDH / Co-CNTs nanocomposite with NiFe-LDH wrapped on the surface of Co-CNTs. The material has high bifunctional activity, high power density, and high stability; it is applied to rechargeable zinc-air batteries with a power density of 194mWcm ‑2 , with high energy conversion efficiency and cycle stability, reaching 142mWcm when used as an integrated air electrode to assemble a flexible zinc-air battery ‑2 maximum power density.

Description

technical field [0001] The invention relates to the technical field of preparation of air electrode materials for rechargeable zinc-air batteries, in particular to a NiFe-LDH / Co-CNTs nanocomposite material and a preparation method and application thereof. Background technique [0002] Zinc-air battery has high energy density, low cost and environmental protection of zinc anode, and the active material of cathode is derived from air, which has a good application prospect. However, the rechargeable performance of zinc-air battery is poor, and its practical application is still a huge challenge. . As the core component of the zinc-air battery, the air electrode not only determines the dynamic performance of the zinc-air battery, but also plays an important role in the charge-discharge efficiency and cycle life of the zinc-air battery. Therefore, the study of efficient and durable air electrode materials has great social and economic significance for the practical application o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/08
CPCH01M4/9041H01M4/9083H01M4/88H01M12/08Y02E60/10
Inventor 徐竹莹胡勇沈峻岭
Owner ZHEJIANG NORMAL UNIVERSITY
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