文献类型：期刊文献

英文题名：Double-shelled tremella-like NiO@Co3O4@MnO2 as a high-performance 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：Wang, Rongfang

机构：[1] School of Chemical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [2] College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China; [3] Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London, WC1E 7JE, United Kingdom; [4] Christopher Ingold Laboratory, Department of Chemistry, University College London, London, WC1H 0AJ, United Kingdom; [5] Collaborative Innovation Center of Renewable Energy Materials, Guangxi University, Nanning, 530004, China

第一机构：贵州理工学院化学工程学院

通信机构：College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China

年份：2017

卷号：343

起止页码：76-82

外文期刊名：Journal of Power Sources

收录：EI(收录号：20170303257473)

语种：英文

外文关键词：Cathodes - Manganese oxide - Solutions - Nickel oxide - Capacitance - Potassium hydroxide

摘要：Tremella-like NiO@Co3O4@MnO2particles 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 179.2m2g?1. Galvanostatic cycling in 6.0M KOH aqueous solution produced capacitance over an ideal cathode potential cycling range. At a high current density of 2Ag?1, NiO@Co3O4@MnO2has a high specific capacitance of 792.5Fg?1with > 90% capacity retention over 1000 cycles, and a high rate capability of 68.9% of its initial capacitance was also maintained over a 0.2–4Ag?1current density increase. We conclude that NiO@Co3O4@MnO2offers 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. ? 2017 Elsevier B.V.