文献类型：期刊文献

英文题名：A novel asymmetric supercapacitors based on binder-free carbon fiber paper@ nickel cobaltite nanowires and graphene foam electrodes

作者：Tang, Qianqiu[1];Chen, Mingming[1];Wang, Le[1];Wang, Gengchao[1]

机构：[1]E 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：2015

卷号：273

起止页码：654

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20144300127369);WOS:【SCI-EXPANDED(收录号:WOS:000345725700084)】；

基金：We greatly appreciate the financial supports of National Natural Science Foundation of China (51173042), Shanghai Municipal Science and Technology Commission (12nm0504102), Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Asymmetric supercapacitors; Nickel cobaltite nanowires; Carbon fiber paper; Graphene foam

摘要：Aqueous-based asymmetric supercapacitors (AASCs) provide an effective way to improve the energy density of the device by broadening the operating voltage window. In this work, nickel cobaltite (NiCo2O4) nanowires are grown homogenously on carbon fiber paper (CFP) to obtain a binder-free CFP@NiCo2O4 positive electrode through a simple hydrothermal method followed by calcination. The highly porous graphene foam (GF) as negative electrode which also exhibits self-supporting structure is prepared by a facile mild reduction process. Taking advantages of the complementary voltage window of CFP@NiCo2O4 and GF, the as-fabricated CFp@NiCo2O4//GF AASC obtains a stable working voltage window of 1.6 V, and a high energy density of 34.5 Wh kg(-1) at the power density of 547 W kg(-1), which still maintains 17.1 Wh kg(-1) at 9.68 kW kg(-1). Furthermore, it exhibits superior cycling performance with 92.2% capacitance retention rate after 10000 cycles. (C) 2014 Elsevier B.V. All rights reserved.