Yin Z, Shao J, Tang W, Sheng W, Sun D, Xiao Y, Cao S. Design and synthesis of 'single-crystal-like' C-doped TiO
2 nanorods for high-performance supercapacitors.
NANOTECHNOLOGY 2020;
31:275401. [PMID:
32163942 DOI:
10.1088/1361-6528/ab7f80]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Although TiO2 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 TiO2 electrode material. The as-synthesized electrode material combines the advantages of TiO2, 'single-crystal-like' features and carbon doping, considerably improving the electrical conductivity of TiO2. The electrochemical measurements demonstrate that the C-doped TiO2 material presents an excellent specific capacitance (449.8 F g-1 at 1 A g-1), which approaches six times more than the value (77.3 F g-1 at 1 A g-1) of P25 electrodes, and far beyond the value of many previously reported TiO2 electrodes. Therefore, this work explores a new method to design high performance electrochemical TiO2 electrode materials by incorporating other dopants into the TiO2 lattice.
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