A general strategy to inner tuned hydrothermal preparation of MxOy@M electrodes and improved electrochemical performances. (1st July 2019)

• Record Type: Journal Article
• Authors: Zhu, Zhaoqiang; Zhang, Kefu; Zhang, Ruizhi; Lin, Jiahao; Zhao, Chunhua; Chen, Guorong; Zhao, Chongjun
• Is Part Of: Electrochimica acta. Volume 310(2019)
• Page Start: 162
• Page End: 172
• Publication Date: 2019-07-01
• Subjects: Modified hydrothermal -- Counterpart-assisted -- Compositing -- Doping -- Inducing; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2019.04.114
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: It is convinced that controllable preparation of active materials and electrode play a key role in improving the electrochemical performances. Herein, a modified hydrothermal technique focusing on assistance of counterpart through slow release feeding of metal ions is supplied by introducing a planar metal counterpart inner the hydrothermal chamber. The influence of slow release feeding rather than conventional batch-feeding of metal ions on targeted product in-situ grown on interested metal support is investigated through compositing, doping and/or possible induction effect. Moreover, anisotropic feeding of this counterpart mode supplies the possibility of oriented induction. As a result, components and morphologies, as well as structure or even crystalline are strongly depended on the counterpart kinds, or even its forms (net, foam or foil). In addition, as-prepared Mx Oy @M electrodes exhibit enhanced capacitance and cycling stability even with high mass loading, and their asymmetric supercapacitors also deliver good energy density and excellent cycling durability. This work supplies a new strategy in developing tuned electrodes. Highlights: A planar metal counterpart was added in the hydrothermal chamber. An inner slow release strategy was introduced. Cu-MoO2 @Mo, MoO2 @Mo, Ni-Fe3 O4 /Fe3 S4 @Fe, Co3 O4 /CoS/Ni(OH)2 @Co. Specific capacitance and cyclability were improved with increased loading amount.