期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 47, 页码 13947-13951出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201506673
关键词
anthraquinone; cathodes; lithium batteries; organic electrode materials; polymers
资金
- National Science Foundation (NSF), USA [IIP-1315651]
- National Institute of Advanced Industrial Science and Technology (AIST), Japan
In spite of recent progress, there is still a lack of reliable organic electrodes for Li storage with high comprehensive performance, especially in terms of long-term cycling stability. Herein, we report an ideal polymer electrode based on anthraquinone, namely, polyanthraquinone (PAQ), or specifically, poly(1,4-anthraquinone) (P14AQ) and poly(1,5-anthraquinone) (P15AQ). As a lithium-storage cathode, P14AQ showed exceptional performance, including reversible capacity almost equal to the theoretical value (260 mAh g(-1); > 257 mAh g(-1) for AQ), a very small voltage gap between the charge and discharge curves (2.18-2.14 = 0.04 V), stable cycling performance (99.4% capacity retention after 1000 cycles), and fast-discharge/charge ability (release of 69% of the low-rate capacity or 64% of the energy in just 2 min). Exploration of the structure-performance relationship between P14AQ and related materials also provided us with deeper understanding for the design of organic electrodes.
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