Solid-state supercapacitor based on activated carbon cloths exhibits excellent rate capability.

Wang, Gongming; Wang, Hanyu; Lu, Xihong; Ling, Yichuan; Yu, Minghao; Zhai, Teng; Tong, Yexiang; Li, Yat · Adv Mater · 2014

basic_science · Level V

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Abstract

Activated carbon cloth is used as an electrode, achieving an excellent areal capacitance of 88 mF/cm(2) (8.8 mF/g) without the use of any other capacitive materials. Significantly, when it is incorporated as part of a symmetric solid-state supercapacitor device, a remarkable charge/discharge rate capability is observed; 50% of the capacitance is retained when the charging rate increases from 10 to 10,000 mV/s.