文献类型：期刊文献

英文题名：Intercalation of cations into partially reduced molybdenum oxide for high-rate pseudocapacitors

作者：Xiao, Xu[1];Zhang, Chuanfang (John)[2];Lin, Shizhe[1];Huang, Liang[1];Hu, Zhimi[1];Cheng, Yongliang[1];Li, Tianqi[1];Qiao, Wenming[2];Long, Donghui[2];Huang, Yunhui[3];Mai, Liqiang[4];Gogotsi, Yury[5,6];Zhou, Jun[1]

机构：[1]Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China;[2]East China Univ Sci & Technol, Dept Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China;[4]Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, WUT Harvard Joint Nano Key Lab, Wuhan 430070, Peoples R China;[5]Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA;[6]Drexel Univ, AJ Drexel Nanomat Inst, Philadelphia, PA 19104 USA

年份：2015

卷号：1

起止页码：1

外文期刊名：ENERGY STORAGE MATERIALS

收录：EI(收录号：20192907206220);WOS:【ESCI(收录号:WOS:000393519400002)】；

基金：This work was financially supported by the National Natural Science Foundation of China (51322210, 61434001) and Director Fund of WNLO. The authors thank Mr. Z. H. Peng, Mr. J. Y. Sun, and Dr. J. Su for the help in experiments, and Dr. Z. F. Li and Prof. Y. H. Zhou for their help in resistance measurement. The authors also acknowledge support of the Analysis and Testing Center of Huazhong University of Science and Technology.

语种：英文

外文关键词：MoO3; nanobelts; Pseudocapacitor; Intercalation; Ion; Energy storage

摘要：Intercalation capacitance is emerging as a promising approach to increasing energy density of electrochemical capacitors. However, the number of materials capable of intercalating ions other than small H+ and Li+ is limited. Here we report a K+ preintercalated hydrogenated MoO3 (KyMoO3-x) with enhanced conductivity and widened interlayer gaps. Different cations (Mg2+, Na+, K+ and Li+) were able to intercalate along the (010) facet of KyMoO3-x with high intercalation capacitance (374 F/cm(3) at 0.5 A/g in 5 M LiCl). The cation intercalation behavior and the origin of the high capacitance have been systematically studied. Using artificial seawater as electrolyte, high volumetric capacitance (188 F/cm(3) at 0.5 Al g) and good rate handling were also achieved. The KyMoO3-x electrode also showed a similar capacitance (196 F/cm(3) at 0.5 A/g) and cycling performance (89% of initial capacitance maintained after 10,000 cycles) in natural seawater. When KyMoO3-x was fabricated into a symmetric pseudocapacitor with natural seawater as the electrolyte, the energy density and power density of the electrode reached 0.91 mWh/ cm(3) and 6.5 W/cm(3), respectively. The impressive results indicate KyMoO3-x is a promising high-power handling pseudocapacitor electrode material. (C) 2015 Elsevier BY. All rights reserved.