Ultrathin BiOX (X=Cl, Br, I) Nanosheets as Al-air Battery Catalysts

Well-crystallized, layered, two-dimensional bismuth oxyhalide (BiOX; X=Cl, Br, or I) ultrathin nanosheets have been synthesized via a simple and low-cost hydrothermal method. The nanosheets are assessed as oxygen reduction reaction (ORR) catalysts for the air electrodes of aluminum-air batteries usi...

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Bibliographic Details
Published in:Electrochimica acta 2017-09, Vol.249, p.413-420
Main Authors: Li, Minchan, Yuan, Jinlan, Nan, Bo, Zhu, Yinggang, Yu, Sicen, Shi, Yang, Yang, Mingyang, Wang, Zhenyu, Gu, Yingying, Lu, Zhouguang
Format: Article
Language:English
Subjects:
air electrode
Aluminum
Batteries
Bismuth
Bismuth oxyhalide
Catalysis
Catalysts
catalytic properties
Chemical synthesis
Crystallization
Current density
Discharge
Electrodes
Linear polarization
Metal air batteries
Nanosheets
ORR
Rotating disks
ultrathin nanosheets
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Summary:Well-crystallized, layered, two-dimensional bismuth oxyhalide (BiOX; X=Cl, Br, or I) ultrathin nanosheets have been synthesized via a simple and low-cost hydrothermal method. The nanosheets are assessed as oxygen reduction reaction (ORR) catalysts for the air electrodes of aluminum-air batteries using linear polarization, constant-current discharge and rotating ring-disk electrode techniques. Electrochemical results show that the obtained BiOI with the highly reactive (001) facets demonstrates higher electrochemical activity than BiOCl and BiOBr under high discharge current density. Koutecky-Levich analysis of the ORR current densities of all compositions indicates that BiOCl and BiOI are mainly dominated by a four-electron pathway.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.08.005