In situ integration of CoFe alloy nanoparticles with nitrogen-doped carbon nanotubes as advanced bifunctional cathode catalysts for Zn-air batteries

被引:124
作者
Cai, Pingwei [1 ,2 ]
Hong, Yuan [1 ,2 ]
Ci, Suqin [1 ]
Wen, Zhenhai [1 ,2 ,3 ]
机构
[1] Nanchang Hangkong Univ, Key Lab Jiangxi Prov Persistent Pollutants Contro, Nanchang 330063, Peoples R China
[2] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, Fuzhou 350002, Peoples R China
[3] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China
基金
中国国家自然科学基金;
关键词
METAL-ORGANIC FRAMEWORK; OXYGEN REDUCTION; EFFICIENT ELECTROCATALYST; SYNERGISTIC CATALYST; NANOWIRE ARRAYS; GRAPHENE; HYBRID; NANOSHEETS; ROBUST; IRON;
D O I
10.1039/c6nr08057j
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Electrochemical catalysis of O-2-incorporated reactions is a promising strategy for metal-air batteries. The performance of metal-air batteries is determined by the catalytic activities of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Therefore, developing efficient catalysts with superior activities for the ORR and OER is of great significance to expand the application range of metal-air batteries. Herein, CoFe alloy nanoparticles adhered to the inside wall of nitrogen doped carbon nanotubes (CoFe@NCNTs) are synthesized and can function as a Janus particle to efficiently catalyze the ORR and OER with desirable activities in 0.1 M KOH solution. Specifically, the CoFe@NCNTs present an onset potential of 0.95 V and a half-wave potential of 0.84 V as an ORR catalyst. When used as an air-cathode catalyst for a Zn-air battery, the CoFe@NCNTs cathode performs better than a Pt/C cathode, showing a high open-circuit potential of 1.45 V, a maximum power density of 150 mW cm(-2) and an average specific capacity of 808 mA h g(zn)(-1) at current densities from 2 mA cm(-2) to 10 mA cm(-2).
引用
收藏
页码:20048 / 20055
页数:8
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