文献类型：期刊文献

英文题名：A graphene/carbon nanotube@π-conjugated polymer nanocomposite for high-performance organic supercapacitor electrodes

作者：Sun, Minqiang[1];Wang, Gengchao[1];Yang, Chongyang[1];Jiang, Hao[1];Li, Chunzhong[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：3

期号：7

起止页码：3880

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20150700530709);WOS:【SCI-EXPANDED(收录号:WOS:000349447200078)】；

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

语种：英文

外文关键词：Capacitance - Electrolytes - Polyaniline - Cerium compounds - Multiwalled carbon nanotubes (MWCN) - Nanocomposites - Sulfur compounds - Conjugated polymers - Graphene - Yarn

摘要：Supercapacitors based on pi-conjugated conducting polymers have attracted attention due to their high pseudo-capacitance characteristics. However, the narrow window of their potential (<1 V) gives rise to low energy density, and this restricts their practical application. In the present study a novel hierarchical nanocomposite, graphene nanosheets/acid-treated multi-walled carbon nanotube-supported poly(1,5-diaminoanthraquinone) (GNS/aMWCNT@PDAA), has been successfully synthesized using cerium sulphate (Ce(SO4)(2)) as oxidant and camphor sulphonic acid as dopant. The nanocomposite exhibits a unique nanoporous morphology, a high pi-conjugated degree and an excellent conductive interpenetrating network. With these intriguing features, in addition to its unique p- and n-doping characteristics, the supercapacitor in a 1 M tetraethylammonium tetrafluoroborate - acetonitrile (Et4NBF4-AN) electrolyte can be reversibly cycled within a potential window of 2.8 V. The supercapacitor achieves a high energy density of 86.4 W h kg(-1) at a power density of 0.73 kW kg(-1), and still retains energy density of 55.5 W h kg(-1) at a power density of 153.9 kW kg(-1). In addition, superior cycling stability is achieved, with only 7% capacitance loss after 10 000 cycles. This excellent performance surpasses that of other recently reported supercapacitors and represents a significant breakthrough in p- conjugated polymer-based supercapacitors.