Design and synthesis of 'single-crystal-like' C-doped TiO 2 nanorods for high-performance supercapacitors

• Published in: Nanotechnology 2020-04, Vol.31 (27), p.275401
• Main Authors: Yin, Zhengliang, Shao, Jian, Tang, Wenjie, Sheng, Weichen, Sun, Dongxiao, Xiao, Yingguan, Cao, Shunsheng
• Format: Article
• Language: English
• ISSN: 0957-4484; 1361-6528
• DOI: 10.1088/1361-6528/ab7f80

Although TiO is widely used as a promising electrode material for supercapacitors, its potential application suffers from a critical limitation due to its poor electrical conductivity and low rate capability. Here, we report a cost-effective hydrothermal strategy to design and construct a novel 'single-crystal-like' C-doped TiO electrode material. The as-synthesized electrode material combines the advantages of TiO , 'single-crystal-like' features and carbon doping, considerably improving the electrical conductivity of TiO . The electrochemical measurements demonstrate that the C-doped TiO material presents an excellent specific capacitance (449.8 F g at 1 A g ), which approaches six times more than the value (77.3 F g at 1 A g ) of P25 electrodes, and far beyond the value of many previously reported TiO electrodes. Therefore, this work explores a new method to design high performance electrochemical TiO electrode materials by incorporating other dopants into the TiO lattice.