Molybdenum–Tungsten Mixed Oxide Deposited into Titanium Dioxide Nanotube Arrays for Ultrahigh Rate Supercapacitors

• DOI: 10.1021/acsami.7b01871
• Publication Date: 2017-05-16T16:09:01Z
• Authors: He Zhou; Xiaopeng Zou; Kaikai Zhang; Peng Sun; Md. Suzaul Islam; Jianyu Gong; Yanrong Zhang; Jiakuan Yang
• Keywords: Mixed oxide

A novel method involving the fabrication of Mo-W mixed oxide (MoxW1-xO3) is proposed to modify modest reaction kinetics and poor cycling stability MoO3 material. By a simple coelectrodeposition method, series MoxW1-xO3 oxides deposited on TiO2 nanotube array substrate. Because differences between Mo6+ W6+ in nature, there significant distortion existing oxides, leading their decreased crystallite size enlarged lattice space, which facilitates ion diffusion solid. As results, show much better balance specific capacitance than bare or WO3 sample, suffers from either low electrochemical activity. Impressively, optimal exhibits high 517.4 F g-1 at 1 g-1, and, moreover, it retains 89.3% even current density 10 demonstrating ultrahigh rate capability. These findings reveal potential for constructing advanced power supercapacitors.