期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 31, 页码 10500-10505出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201904258
关键词
concentrated electrolyte; graphite anode; long-term stability; operando XRD; potassium ion battery
资金
- National Natural Science Foundation of China [51672078, 21473052, and 61474041] Funding Source: Medline
- Foundation of State Key Laboratory of Coal Conversion [J17-18-903] Funding Source: Medline
- Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project [71675004] Funding Source: Medline
Graphite as an anode for the potassium ion battery (PIBs) has the merits of low cost and potentially high energy density, while suffering from limited cycle time and inferior stability. Herein we, using a concentrated electrolyte, demonstrate that formation of a robust inorganic-rich passivation layer on the graphite anode could resolve these problems. Consequently, the PIBs with graphite anode could operate for over 2000 cycles (running time of over 17 months) with negligible capacity decay, and had a high area capacity over 7.36 mAh cm(-2) with a high mass loading of 28.56 mg cm(-2). These unprecedented performances of graphite are comparable to that of traditional lithium-ion batteries, and may promote the rapidly development of high performance PIBs.
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