Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10150433 | Electrochimica Acta | 2018 | 53 Pages |
Abstract
TiO2-doped RuO2 nanoparticles, obtained through wet milling and sol-gel process, are coated on thin SnO2 film covered tantalum substrate by magnetron sputtering to make a composite electrode of sandwiched framework. Phase structure, morphology, specific surface area, pore distribution as well as electrochemical performance of this composite electrode are tested and analyzed. Our results indicate that sample annealed at 260â¯Â°C for 4â¯h has optimal microstructure and electrochemical performance at doping level of 15â¯wt.% TiO2 with particles size of 38-43â¯nm and specific surface area of 22.330â¯m2â¯gâ1. Specific capacitance of 692â¯Fgâ1 (the highest in this study), good charge-discharge behavior, low equivalent series resistance as well as long cycling life are observed. Integrating into a 50â¯V 8000â¯Î¼F electrochemical capacitor, specific energy and specific power reach 31.6 in Wh.Kgâ1 and specific power of 2032 Wâ¯Kgâ1, respectively. Meanwhile, composite electrode shows stable capacitance without hydrogen evolution and peeling between TiO2-doped RuO2 nanoparticles and thin SnO2 film modified tantalum substrate.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
X. Li, F. Zheng, D.F. Zhou, Y.M. Luo, Y.F. Li, F.H. Lu,