Facile preparation of high-performance MnO2/KB air cathode for Zn-air batteries

被引:25
作者
Wu, M. C. [1 ]
Zhao, T. S. [1 ]
Jiang, H. R. [1 ]
Wei, L. [1 ]
Zhang, Z. H. [1 ]
机构
[1] Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Kowloon, Hong Kong, Peoples R China
关键词
Zn-air battery; Manganese dioxide; Air cathode; Oxygen reduction reaction; OXYGEN REDUCTION REACTION; EFFICIENT ELECTROCATALYST; BIFUNCTIONAL CATALYST; MANGANESE OXIDE; ACTIVE-SITES; CARBON; NITROGEN; METAL; NANOPARTICLES; ELECTRODE;
D O I
10.1016/j.electacta.2016.11.122
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
MnO2 has been demonstrated to be an effective catalyst for Zn-air batteries, but suffers from cripplingly low cell performance due to its limited electrical conductivity. In this work, we report a facile process for preparing the MnO2/C air cathode by directly anchoring the MnO2 onto Ketjen Black (KB) via an in-situ redox reaction. It is demonstrated that a Zn-air battery installed with the proposed MnO2/KB air cathode outperforms that installed with a commercial Pt/C cathode. Specifically, the MnO2/KB cathode presents a more positive ORR onset potential and a larger current density compared with that of the Pt/C cathode. Under ambient air, the prepared MnO2/KB air cathode allows the battery to reach a peak power density of 133.17 mW cm(-2) when operated at a current density of 188.51 mA cm(-2), which is among the highest values in the literature. More impressively, the battery installed with the proposed cathode can be operated at a high current density of up to 100 mA cm(-2) with a voltage discharge plateau larger than 1.0V. These results indicate that the MnO2/KB electrode offers a promising option for both alkaline fuel cells and metal-air batteries. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1438 / 1444
页数:7
相关论文
共 57 条
[41]   pH Effect on Electrochemistry of Nitrogen-Doped Carbon Catalyst for Oxygen Reduction Reaction [J].
Wan, Kai ;
Yu, Zhi-peng ;
Li, Xiao-hua ;
Liu, Ming-yao ;
Yang, Gang ;
Piao, Jin-hua ;
Liang, Zhen-xing .
ACS CATALYSIS, 2015, 5 (07) :4325-4332
[42]   Nitrogen-doped ordered mesoporous carbon: synthesis and active sites for electrocatalysis of oxygen reduction reaction [J].
Wan, Kai ;
Long, Gui-Fa ;
Liu, Ming-Yao ;
Du, Li ;
Liang, Zhen-Xing ;
Tsiakaras, Panagiotis .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2015, 165 :566-571
[43]   Challenges and opportunities of nanostructured materials for aprotic rechargeable lithium-air batteries [J].
Wang, Jiajun ;
Li, Yongliang ;
Sun, Xueliang .
NANO ENERGY, 2013, 2 (04) :443-467
[44]   Oxygen electrocatalysts in metal-air batteries: from aqueous to nonaqueous electrolytes [J].
Wang, Zhong-Li ;
Xu, Dan ;
Xu, Ji-Jing ;
Zhang, Xin-Bo .
CHEMICAL SOCIETY REVIEWS, 2014, 43 (22) :7746-7786
[45]   MnO2-x nanosheets on stainless steel felt as a carbon- and binder-free cathode for non-aqueous lithium-oxygen batteries [J].
Wei, Z. H. ;
Zhao, T. S. ;
Zhu, X. B. ;
Tan, P. .
JOURNAL OF POWER SOURCES, 2016, 306 :724-732
[46]   A non-carbon cathode electrode for lithium-oxygen batteries [J].
Wei, Z. H. ;
Tan, P. ;
An, L. ;
Zhao, T. S. .
APPLIED ENERGY, 2014, 130 :134-138
[47]   Cost-effective carbon supported Fe2O3 nanoparticles as an efficient catalyst for non-aqueous lithium-oxygen batteries [J].
Wu, M. C. ;
Zhao, T. S. ;
Tan, P. ;
Jiang, H. R. ;
Zhu, X. B. .
ELECTROCHIMICA ACTA, 2016, 211 :545-551
[48]   Electrocatalytic performance of Ni modified MnOX/C composites toward oxygen reduction reaction and their application in Zn-air battery [J].
Wu, Qiumei ;
Jiang, Luhua ;
Qi, Luting ;
Wang, Erdong ;
Sun, Gongquan .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2014, 39 (07) :3423-3432
[49]   Hydrothermal synthesis of MnO2/CNT nanocomposite with a CNT core/porous MnO2 sheath hierarchy architecture for supercapacitors [J].
Xia, Hui ;
Wang, Yu ;
Lin, Jianyi ;
Lu, Li .
NANOSCALE RESEARCH LETTERS, 2012, 7 :1-10
[50]   Characterization of a manganese dioxide/carbon nanotube composite fabricated using an in situ coating method [J].
Xie, Xiaofeng ;
Gao, Lian .
CARBON, 2007, 45 (12) :2365-2373