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High-Performance Symmetric Supercapacitor Constructed Using Carbon Cloth Boosted by Engineering Oxygen-Containing Functional Groups
- Miao, Zhenyu, Huang, Yuan, Xin, Jianping, Su, Xiaowen, Sang, Yuanhua, Liu, Hong, Wang, Jian-Jun
- ACS applied materials & interfaces 2019 v.11 no.19 pp. 18044-18050
- adsorption, capacitance, carbon, catalytic activity, desorption, electrodes, energy density, mechanical properties, moieties, recycling
- Carbon materials display appealing physical, chemical, and mechanical properties and have been extensively studied as supercapacitor electrodes. The surface engineering further allows us to tune their capability of adsorption/desorption and catalysis. Therefore, a facile and inexpensive chemical-acid-etching approach has been developed to activate the carbon cloth as an electrode for supercapacitor. The capacitance of the acid-etched carbon cloth electrode can approach 5310 mF cm–² at a current density of 5 mA cm–² with remarkable recycling stability. The all-solid-state symmetric supercapacitor delivered a high energy density of 4.27 mWh cm–³ at a power density of 1.32 W cm–³. Furthermore, this symmetric supercapacitor exhibited outstanding mechanical flexibility, and the capacity remained nearly unchanged after 1000 bending cycles.