文献类型：期刊文献

英文题名：Rose-derived 3D carbon nanosheets for high cyclability and extended voltage supercapacitors

作者：Zhao, Chongjun[1];Huang, Yaoxuan[1];Zhao, Chunhua[1];Shao, Xiaoxiao[1];Zhu, Zhaoqiang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2018

卷号：291

起止页码：287

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20184205952795);WOS:【SCI-EXPANDED(收录号:WOS:000447646800032)】；

基金：We gratefully acknowledge the financial support of this research by the Shanghai Natural Science Foundation (No. 13ZR1411900), the Shanghai Leading Academic Discipline Project (B502), the Shanghai Key Laboratory Project (08DZ2230500), International Cooperation Project of Shanghai Municipal Science and Technology Committee (15520721100).

语种：英文

外文关键词：Withered rose; Carbon nanosheets; Supercapacitor; Wide voltage window; Cyclability

摘要：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.