Study of NiMnO3-based oxide catalysts for efficient oxygen reduction reactions and alkaline Al-air batteries

被引:2
|
作者
Wang, Wenping [1 ,2 ]
Zhao, Zhiyi [1 ]
Deng, Jiayao [3 ]
Lang, Wei [2 ]
Zhen, Lipeng [2 ]
Lu, Huimin [4 ]
机构
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Beijing Inst Control Engn, Beijing 100190, Peoples R China
[3] Global Energy Interconnect Res Inst Co Ltd, State Key Lab Adv Transmiss Technol, Beijing 102209, Peoples R China
[4] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
关键词
Ni-Mn bimetal oxides; Electrochemical performance; Battery discharge performance; MNO2; ELECTROCATALYSTS; SUPERCAPACITOR; NANOPARTICLES; COMPOSITES; ORR;
D O I
10.1007/s11581-023-05034-7
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The oxygen reduction reaction of the cathode in an Al-air battery plays a key role in the performance of the entire battery. Generally, Pt and its alloys are recognized as catalysts with high oxygen reduction catalytic performance, but their application is limited by the rare earth content and high cost. In this paper, alpha-MnO2 nanotubes are prepared using a hydrothermal method and used as a template. Nano-Ni-Mn bimetallic oxides with different compositions are prepared with different NiO and alpha-MnO2 ratios by calcination. The effects of morphology, phase, and Mn3+/Mn4+ and Ni3+/Ni2+ ratios on electrochemical performance and battery discharge performance are analyzed. The results show that the contents of alpha-MnO2 and Ni6MnO8 in NM-12 catalyst are low, and the molar ratio of Mn3+/Mn4+ and Ni3+/Ni2+ is high. Also, the specific surface area of NM-12 is relatively high. Finally, the catalyst prepared with a NiO to alpha-MnO2 ratio of 1:2 shows better electrochemical catalytic performance and battery discharge performance that is comparable to that obtained for a commercial 20 wt% Pt/C catalyst.
引用
收藏
页码:2853 / 2864
页数:12
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