文献类型：期刊文献

英文题名：Reclaimed Carbon Fiber-Based 2.4 V Aqueous Symmetric Supercapacitors

作者：Zhou, Yanan[1];Zhu, Zhaoqiang[1];Zhao, Chunhua[1];Zhang, Kefu[1];Wang, Bailing[1];Zhao, Chongjun[1];Chen, Guorong[1]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：7

期号：5

起止页码：5095

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20191006601468);WOS:【SCI-EXPANDED(收录号:WOS:000460600500057)】；

基金：We are grateful for the support of National Natural Science Foundation of China (No. 51502092) and The Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning (No. TP2015028), Shanghai Alliance Plan (Nos. LM201881 and LM201751), International Cooperation Project of Shanghai Municipal Science and Technology Committee (No. 15520721100), Natural Science Foundation of Shanghai (No. 13ZR1411900), Shanghai Leading Academic Discipline Project (No. B502), and Shanghai Key Laboratory Project (No. 08DZ2230500).

语种：英文

外文关键词：Reclaimed carbon fibers; Aerobic pyrolysis; Oxygen-containing functional groups; High-voltage window; Symmetric supercapacitors

摘要：Carbon fiber (CF) is a promising material as carbon-based electrode and support for flexible super-capacitors. However, it still suffers from narrow voltage in the aqueous electrolyte due to the water decomposition (1.23 V). Herein, an aerobic pyrolysis is developed to recover aligned carbon fibers from carbon fiber reinforced polymers. More importantly, during this oxygen existence condition, the surface of reclaimed carbon fibers (RCFs) is etched into groove-shaped structure and modified by introducing abundant oxygen-containing functional groups, which significantly expands the negative potential window of RCFs-based electrode to -1.4 V (vs standard calomel electrode) and the working voltage of RCFs-based symmetric supercapacitor to 2.4 V in an aqueous electrolyte of 1.0 M Na2SO4, with capacitance retention of 90% and 93.6% after 10 000 cycles, respectively. This work well matches the aerobic pyrolysis of recovery of CFs from CFRPs and electrochemical performances of RCFs, supplying a new strategy to develop high-performance energy storage device.