文献类型：期刊文献

英文题名：Double-shelled tremella-like NiO@Co3O4@MnO2 as a highperformance cathode material for alkaline supercapacitors

作者：Wang, Hui Ren, Qian Brett, Dan J. L. He, Guanjie Wang, Rongfang Key, Julian Ji, Shan

第一作者：Wang, Hui

通信作者：Ji, S[1];Wang, RF[2];Ji, S[3]

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[2]Northwest Normal Univ, Coll Chem & Chem Engn, Lanzhou 730070, Peoples R China;[3]UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England;[4]UCL, Dept Chem, Christopher Ingold Lab, London WC1H 0AJ, England;[5]Guangxi Univ, Collaborat Innovat Ctr Renewable Energy Mat, Nanning 530004, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;corresponding author), Northwest Normal Univ, Coll Chem & Chem Engn, Lanzhou 730070, Peoples R China;corresponding author), UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England.|贵州理工学院化学工程学院;贵州理工学院;

年份：2017

卷号：343

起止页码：76-82

外文期刊名：JOURNAL OF POWER SOURCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000395211200010)】；

基金：The authors would like to thank the National Natural Science Foundation of China (21363022, 51661008 and 51362027) for financially supporting this work.

语种：英文

外文关键词：Double-shelled; Nanosheet; Porous; Hydrothermal method; Supercapacitor

摘要：Tremella-like NiO@Co3O4@MnO2 particles of core-double-shelled structure were synthesized by a three step hydrothermal route and thermal treatment. The hierarchical layered porous structure of the particles has a BET surface area of 179.2 m2 g(-1). Galvanostatic cycling in 6.0 M KOH aqueous solution produced capacitance over an ideal cathode potential cycling range. At a high current density of 2 A g(-1), NiO@Co3O4@MnO2 has a high specific capacitance of 792.5 Fg(-1) with > 90% capacity retention over 1000 cycles, and a high rate capability of 68.9% of its initial capacitance was also maintained over a 0.2-4 A g(-1) current density increase. We conclude that NiO@Co3O4@MnO2 offers a promising high rate, high specific capacitance cathode material for alkaline supercapacitors, which owes both to its porous architecture and its synergistic mixed oxide core -shell -shell composition. (C) 2017 Elsevier B.V. All rights reserved.