期刊
ELECTROCHIMICA ACTA
卷 291, 期 -, 页码 287-296出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.09.136
关键词
Withered rose; Carbon nanosheets; Supercapacitor; Wide voltage window; Cyclability
资金
- Shanghai Natural Science Foundation [13ZR1411900]
- Shanghai Leading Academic Discipline Project [B502]
- Shanghai Key Laboratory Project [08DZ2230500]
- International Cooperation Project of Shanghai Municipal Science and Technology Committee [15520721100]
Biomass based porous carbon has been deemed to the most prospective electrode materials for high performance supercapacitors owing to its diversity and reproducibility. Herein, a three-dimensional (3D) porous structure consisting of interconnected carbon nanosheets were synthesized by withered rose through a convenient and efficient carbonization-activation method. This rose-derived active carbon nanosheets (RAC) display a high specific surface area (1911 m(2) g(-1)) and a moderate bulk density (0.55 g cm(-3)). RAC-based supercapacitor electrode exhibits a remarkable cycling stability of 99% capacitance retention after 25000 cycles even at a high specific capacitance of 208 F g(-1). More importantly, its symmetric supercapacitor (SSC) owns an extended voltage window of 2.1 V and an excellent electro-chemical stability (92% capacitance retention after 10000 cycles). (c) 2018 Elsevier Ltd. All rights reserved.
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