文献类型：期刊文献

英文题名：MnO2 nanoflowers and polyaniline nanoribbons grown on hybrid graphene/Ni 3D scaffolds by in situ electrochemical techniques for high-performance asymmetric supercapacitors

作者：Wu, Liqiong[1];Hao, Lihua[1];Pang, Bowen[2];Wang, Guofeng[1];Zhang, Yin[1];Li, Xinheng[1]

第一作者：Wu, Liqiong

通讯作者：Li, XH[1]

机构：[1]Chinese Acad Sci, Lanzhou Inst Chem Phys, Suzhou Res Inst, State Key Lab Oxo Synth & Select Oxidat, Suzhou 215123, Peoples R China;[2]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453003, Peoples R China

第一机构：Chinese Acad Sci, Lanzhou Inst Chem Phys, Suzhou Res Inst, State Key Lab Oxo Synth & Select Oxidat, Suzhou 215123, Peoples R China

通讯机构：[1]corresponding author), Chinese Acad Sci, Lanzhou Inst Chem Phys, Suzhou Res Inst, State Key Lab Oxo Synth & Select Oxidat, Suzhou 215123, Peoples R China.

年份：2017

卷号：5

期号：9

起止页码：4629-4637

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20171003409724);Scopus(收录号：2-s2.0-85014226660);WOS:【SCI-EXPANDED(收录号:WOS:000395926100041)】；

基金：We are grateful for financial support from the National Natural Science Foundation of China (No. 21573263) and Jiangsu Provincial Science Foundation of China (No. BK20151236). Prof. X. H. Li thanks Suzhou Sinano for characterization and test assistance.

语种：英文

外文关键词：Anodes - Capacitance - Cathodes - Graphene - Hybrid materials - Manganese oxide - Nickel compounds - Polyaniline - Scaffolds - Supercapacitor

摘要：It is highly desirable to develop asymmetric supercapacitors (ASCs) with high energy density while maintaining high power density and long cycle life. In view of this, various carbon and pseudocapacitor materials have often been introduced to form nanocomposite electrodes. But, until now, an energy density of ASCs over 40 W h kg(-1) at high power density has been a big issue. How to make the cathode and anode have high and comparable specific capacitance is crucial to obtain high energy density for practical application of ASCs. Herein, we report a hybrid 3D graphene/Ni foam (HGNF)-based MnO2/HGNF//polyaniline (PANI)/HGNF ASC, which was prepared by in situ electrochemical techniques. The cathode MnO2/HGNF and the anode PANI/HGNF provide high specific capacities of 480.0 and 478.8 F g(-1) at 1.0 A g(-1) respectively, which are highly comparable for ASCs. The MnO2/HGNF//PANI/HGNF ASC provides an excellent energy density of 41.0 W h kg(-1) at 787.3 W kg(-1). The reasons can be attributed to its 3D hybrid porous structure with fast electron and ion transfer rates and comparably high specific capacitances of both electrode materials, which can show both electrochemical double-layer capacitance and pseudocapacitance behaviors.