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Space-Confined Synthesis of CoNi nanoalloy in N-doped Porous Carbon Frameworks as Efficient Oxygen Reduction Catalyst for Neutral and Alkaline Aluminum-air Batteries

Jiang, Min, Yang, Jian, Zhang, Wei, He, Lin, Zhang, Jiao, Fu, Chaopeng and Sun, Baode (2020) Space-Confined Synthesis of CoNi nanoalloy in N-doped Porous Carbon Frameworks as Efficient Oxygen Reduction Catalyst for Neutral and Alkaline Aluminum-air Batteries Energy Storage Materials, 27. pp. 96-108.

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Abstract

Exploring efficient and stable non-precious metal electrocatalysts for oxygen reduction reaction in neutral and alkaline solutions is of great importance for metal-air batteries. Herein, an efficient and stable electrocatalyst with CoNi nanoalloy (10-20 nm) uniformly embedded in porous N-doped carbon framework (CoNi-NCF) for neutral and alkaline primary Al-air batteries is prepared and studied. The CoNi-NCF electrocatalyst shows superior ORR performance in terms of half-wave potential of 0.91 V in 0.1 M KOH solution and 0.64 V in 3.5 wt% NaCl solution, outperforming those of the commercial Pt/C catalyst. Supported by in situ electrochemical Raman spectra and density functional theory calculations, the rich dual active sites of CoNi nanoalloy and porous N-doped carbon contributes to the outstanding ORR performance. Impressively, when employed as a cathode catalyst in both aqueous and solid flexible Al-air batteries, the CoNi-NCF-based Al-air batteries show the highest discharge performance, long-time durability and high flexibility, demonstrating the promising potential for practical application.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Jiang, Min
Yang, Jian
Zhang, Weiwz0003@surrey.ac.uk
He, Lin
Zhang, Jiao
Fu, Chaopeng
Sun, Baode
Date : 17 January 2020
Copyright Disclaimer : ©2020 Elsevier B.V. All rights reserved.
Uncontrolled Keywords : CoNi alloy; nitrogen-doped carbon frameworks; oxygen reduction reaction; In-situ Raman; Al-air battery
Depositing User : James Marshall
Date Deposited : 03 Feb 2020 16:43
Last Modified : 03 Feb 2020 16:43
URI: http://epubs.surrey.ac.uk/id/eprint/853629

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