期刊
ADVANCED MATERIALS
卷 30, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201703824
关键词
aluminum-ion battery; binder-free; cobalt sulfide@carbon nanotube composites; free-standing; long-term stability
类别
资金
- Australian Research Council
- China Jiangsu Specially Appointed Professor
- Fundamental Research Funds for the Central Universities [NE2017004]
- RTP
- UQ-cent Scholarship
Rechargeable aluminum-ion batteries (AIBs) are considered as a new generation of large-scale energy-storage devices due to their attractive features of abundant aluminum source, high specific capacity, and high energy density. However, AIBs suffer from a lack of suitable cathode materials with desirable capacity and long-term stability, which severely restricts the practical application of AIBs. Herein, a binder-free and self-standing cobalt sulfide encapsulated in carbon nanotubes is reported as a novel cathode material for AIBs. The resultant new electrode material exhibits not only high discharge capacity (315 mA h g(-1) at 100 mA g(-1)) and enhanced rate Performance (154 mA h g(-1) at 1 A g(-1)), but also extraordinary cycling stability (maintains 87 mA h g(-1) after 6000 cycles at 1 A g(-1)). The free-standing feature of the electrode also effectively suppresses the side reactions and material disintegrations in AIBs. The new findings reported here highlight the possibility for designing high-performance cathode materials for scalable and flexible AIBs.
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