期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 36, 页码 11569-11573出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201803664
关键词
electrochemistry; hydrogen-ion storage; intercalation; molybdenum trioxide; ultrafast kinetics
资金
- National Natural Science Foundation of China [21603157, 51622208]
- Natural Science Foundation of Jiangsu Province [BK20150311, BK20140315]
- College Natural Science Foundation of Jiangsu Province [16KJB430025]
- Postdoctoral Science Foundation of China [2016T90488, 2015M580459]
- Suzhou Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies
- Soochow University Analysis and Testing Center
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 88mAhg(-1) at an ultrahigh rate of 100C. 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 H0.88MoO3 during the first hydrogen-ion insertion process and reversible intercalation/deintercalation of hydrogen ions between H0.88MoO3 and H0.12MoO3 during the following cycles. This study reveals new opportunities for the development of high-power energy storage devices with lightweight elements.
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