University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Integrated and Binder‐Free Air Cathodes of Co 3 Fe 7 Nanoalloy and Co 5.47 N Encapsulated in Nitrogen‐Doped Carbon Foam with Superior Oxygen Reduction Activity in Flexible Aluminum‐Air Batteries

Jiang, Min, Fu, Chaopeng, Cheng, Ruiqi, Zhang, Wei, Liu, Tongyao, Wang, Ruibin, Zhang, Jiao and Sun, Baode (2020) Integrated and Binder‐Free Air Cathodes of Co 3 Fe 7 Nanoalloy and Co 5.47 N Encapsulated in Nitrogen‐Doped Carbon Foam with Superior Oxygen Reduction Activity in Flexible Aluminum‐Air Batteries Advanced Science, 2000747.

[img]
Preview
Text
advs.202000747.pdf - Version of Record
Available under License Creative Commons Attribution.

Download (9MB) | Preview

Abstract

All-solid-sate Al-air batteries with features of high theoretical energy density, low cost, and environmental-friendliness are promising as power sources for next-generation flexible and wearable electronics. However, the sluggish oxygen reduction reaction (ORR) and poor interfacial contact in air cathodes cause unsatisfied performance. Herein, a free-standing Co3Fe7 nanoalloy and Co5.47N encapsulated in 3D nitrogen-doped carbon foam (Co3Fe7@Co5.47N/NCF) is prepared as an additive-free and integrated air cathode for flexible Al-air batteries in both alkaline and neutral electrolytes. The Co3Fe7@Co5.47N/NCF outperforms commercial platinum/carbon (Pt/C) toward ORR with an onset potential of 1.02 V and a positive half-wave potential of 0.92 V in an alkaline electrolyte (0.59 V in sodium chloride solution), which is ascribed to the unique interfacial structure between Co3Fe7 and Co5.47N supported by 3D N-doped carbon foam to facilitate fast electron and mass transfer. The high ORR performance is also supported by in-situ electrochemical Raman spectra and density functional theory calculation. Furthermore, the fabricated Al-air battery displays good flexibility and delivers a power density of 199.6 mW cm−2, and the binder-free and integrated cathode shows better discharge performance than the traditionally slurry casting cathode. This work demonstrates a facile and efficient approach to develop integrated air cathode for metal-air batteries.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Jiang, Min
Fu, Chaopeng
Cheng, Ruiqi
Zhang, Weiwz0003@surrey.ac.uk
Liu, Tongyao
Wang, Ruibin
Zhang, Jiao
Sun, Baode
Date : 5 August 2020
Funders : National Natural Science Foundation of China
DOI : 10.1002/advs.202000747
Grant Title : National Natural Science Foundation of China
Copyright Disclaimer : © 2020 The Authors. Published by Wiley‐VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Additional Information : Embargo OK Metadata OK No Further Action
Depositing User : James Marshall
Date Deposited : 17 Aug 2020 12:29
Last Modified : 17 Aug 2020 12:29
URI: http://epubs.surrey.ac.uk/id/eprint/858420

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800