文献类型：期刊文献

英文题名：Long-life flexible supercapacitors based on nitrogen-doped porous graphene@π-conjugated polymer film electrodes and porous quasi-solid-state polymer electrolyte

作者：Jin, Jie[1]; Mu, Hongchun[1]; Wang, Wenqiang[1]; Li, Xingwei[1]; Cheng, Qilin[1]; Wang, Gengchao[1]

机构：[1] Shanghai Key Laboratory of Advanced Polymeric Materials, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2019

卷号：317

起止页码：250

外文期刊名：Electrochimica Acta

收录：EI(收录号：20192507063328)

语种：英文

外文关键词：Conjugated polymers - Polymer films - Supercapacitor - Dissolution - Graphene - Nitrogen - Semiconducting films - Solid electrolytes - Cathodes - Doping (additives) - Extrusion - Anodes - Polyelectrolytes - Film preparation

摘要：Polyaniline (PANI) has been regarded as a promising electrode material for energy storage devices. However, unsatisfactory cycling stability seriously restricts its practical application. Herein, the nitrogen-doped porous graphene (NPG) film-supported vertically aligned polyaniline nanocones (NPG@PANI) flexible cathodes were synthesized by electrochemical polymerization. The as-prepared NPG@PANI displays unique porous morphology and strong π-π stacking interaction, which facilitates charge transportation and suppresses the dissolution as well as relieves volume changes of PANI during charging-discharging process. Moreover, a novel quasi-solid-state polymer electrolyte (QPE) of porous acrylate rubber/tetraethylammonium tetrafluoroborate-acetonitrile (pACM/Et4NBF4-AN) with enhanced ionic conductivity was prepared to match with π-conjugated polymer electrodes, which helps to restrain the dissolution and the structure degradation of electrodes. To enhance the energy density, the organic asymmetric flexible supercapacitor (oAFSC) was assembled by NPG@PANI cathode, NPG supported-poly(1,5-diaminoanthraquinone) (NPG@PDAA) anode and pACM/Et4NBF4-AN QPE. The as-assembled oAFSC shows high energy density (6.18 mWh cm?3), good rate capability and superior cycling stability (88.7% capacitance retention after 10000 cycles). ? 2019 Elsevier Ltd