Redox Chemistry of Molybdenum Trioxide for Ultrafast Hydrogen-Ion Storage

Angewandte Chemie
Xianfu WangChenglin Yan

Abstract

Hydrogen ions are ideal charge carriers for rechargeable batteries due to their small ionic radius and wide availability. However, little attention has been paid to hydrogen-ion storage devices because they generally deliver relatively low Coulombic efficiency as a result of the hydrogen evolution reaction that occurs in an aqueous electrolyte. Herein, we successfully demonstrate that hydrogen ions can be electrochemically stored in an inorganic molybdenum trioxide (MoO3 ) electrode with high Coulombic efficiency and stability. The as-obtained electrode exhibits ultrafast hydrogen-ion storage properties with a specific capacity of 88 mA hg-1 at an ultrahigh rate of 100 C. The redox reaction mechanism of the MoO3 electrode in the hydrogen-ion cell was investigated in detail. The results reveal a conversion reaction of the MoO3 electrode into H0.88 MoO3 during the first hydrogen-ion insertion process and reversible intercalation/deintercalation of hydrogen ions between H0.88 MoO3 and H0.12 MoO3 during the following cycles. This study reveals new opportunities for the development of high-power energy storage devices with lightweight elements.

References

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Apr 16, 2013·Nature Materials·Veronica AugustynBruce Dunn
Feb 6, 2015·Angewandte Chemie·Dipan KunduLinda F Nazar
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Citations

Nov 28, 2018·ChemSusChem·Kai TangChenglin Yan
Jul 14, 2019·Angewandte Chemie·Xianyong WuXiulei Ji
Aug 18, 2020·Angewandte Chemie·Yunkai XuXiulei Ji
Oct 7, 2020·Chemical Communications : Chem Comm·Xuancheng PengChuan Zhao
Feb 16, 2021·Physical Chemistry Chemical Physics : PCCP·Zilin QuZhenyi Jiang
Jan 15, 2021·Angewandte Chemie·Shuai WangZhiqiang Niu
Jun 18, 2021·Nano-micro Letters·Xikun ZhangJie Shu
Feb 6, 2020·ACS Applied Materials & Interfaces·Xianyong WuXiulei Ji
Nov 13, 2019·ACS Applied Materials & Interfaces·Bowen JinPatrik Schmuki
Nov 6, 2020·ACS Applied Materials & Interfaces·Xiaoqiang ShanXiaowei Teng
Nov 23, 2021·Journal of the American Chemical Society·Zhengxin ZhuWei Chen
Dec 18, 2021·Angewandte Chemie·Zhiwei TieJun Chen
Jan 12, 2022·Chemical Communications : Chem Comm·Beibei YangHongbin Lu

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