Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/106793
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Type: Journal article
Title: Atomic modulation of FeCo-nitrogen-carbon bifunctional oxygen electrodes for rechargeable and flexible all-solid-state zinc-air battery
Author: Su, C.
Cheng, H.
Li, W.
Liu, Z.
Li, N.
Hou, Z.
Bai, F.
Zhang, H.
Ma, T.
Citation: Advanced Energy Materials, 2017; 7(13):1602420-1-1602420-12
Publisher: Wilwey
Issue Date: 2017
ISSN: 1614-6832
1614-6840
Statement of
Responsibility: 
Chang-Yuan Su, Hui Cheng, Wei Li, Zhao-Qing Liu, Nan Li, Zhufeng Hou, Fu-Quan Bai, Hong-Xing Zhang, and Tian-Yi Ma
Abstract: Rational design and exploration of robust and low-cost bifunctional oxygen reduction/evolution electrocatalysts are greatly desired for metal–air batteries. Herein, a novel high-performance oxygen electrode catalyst is developed based on bimetal FeCo nanoparticles encapsulated in in situ grown nitrogen-doped graphitic carbon nanotubes with bamboo-like structure. The obtained catalyst exhibits a positive half-wave potential of 0.92 V (vs the reversible hydrogen electrode, RHE) for oxygen reduction reaction, and a low operating potential of 1.73 V to achieve a 10 mA cm⁻² current density for oxygen evolution reaction. The reversible oxygen electrode index is 0.81 V, surpassing that of most highly active bifunctional catalysts reported to date. By combining experimental and simulation studies, a strong synergetic coupling between FeCo alloy and N-doped carbon nanotubes is proposed in producing a favorable local coordination environment and electronic structure, which affords the pyridinic N-rich catalyst surface promoting the reversible oxygen reactions. Impressively, the assembled zinc–air batteries using liquid electrolytes and the all-solid-state batteries with the synthesized bifunctional catalyst as the air electrode demonstrate superior charging–discharging performance, long lifetime, and high flexibility, holding great potential in practical implementation of new-generation powerful rechargeable batteries with portable or even wearable characteristic.
Keywords: Bifunctional catalysts; flexible devices; oxygen evolution reaction; oxygen reduction reaction; zinc-air batteries
Rights: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
RMID: 0030072250
DOI: 10.1002/aenm.201602420
Grant ID: http://purl.org/au-research/grants/arc/DE150101306
http://purl.org/au-research/grants/arc/LP160100927
Appears in Collections:Chemical Engineering publications

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