In situ imaging of electrocatalysis in a K–O2 battery with a hollandite α-MnO2 nanowire air cathode

Yushu Tang; Liqiang Zhang; Yongfu Tang; Xin Wang; Teng Zhang; Rui Yang; Chi Ma; Na Li; Yuening Liu; Xinxin Zhao; Xionghu Zhang; Zaifa Wang; Baiyu Guo; Yongfeng Li; Jianyu Huang

doi:10.1039/C9CC05226G

In situ imaging of electrocatalysis in a K–O₂ battery with a hollandite α-MnO₂ nanowire air cathode†

Yushu Tang,^a Liqiang Zhang,

^a Yongfu Tang,

^b Xin Wang,^a Teng Zhang,^a Rui Yang,^a Chi Ma,^a Na Li,^a Yuening Liu,^a Xinxin Zhao,^a Xionghu Zhang,^a Zaifa Wang,^b Baiyu Guo,^b Yongfeng Li

*^a and Jianyu Huang

*^bc

Author affiliations

* Corresponding authors

^a State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, Changping, China
E-mail: yfli@cup.edu.cn

^b Clean Nano Energy Center, State Key Lab Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China

^c Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan 411105, China
E-mail: jyhuang8@hotmail.com

Abstract

Using α-manganese dioxide (α-MnO₂) nanowires as the air electrode, a K–O₂ nanobattery is assembled in an aberration corrected environmental transmission electron microscope. It is found that the α-MnO₂ nanowires are reduced into Mn₃O₄ and MnO during discharge; meanwhile, KO₂ is formed on the surface of the α-MnO₂ nanowires.

Chemical Communications

In situ imaging of electrocatalysis in a K–O₂ battery with a hollandite α-MnO₂ nanowire air cathode†

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In situ imaging of electrocatalysis in a K–O₂ battery with a hollandite α-MnO₂ nanowire air cathode

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