期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 8, 期 5, 页码 1559-1568出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ee00339c
关键词
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资金
- SERC Public Sector Research Funding [1121202012]
- Agency for Science, Technology, and Research (A*STAR)
- MOE AcRF Tier 1 [RG104/14]
- CAS/SAFEA International Partnership Program for Creative Research Teams
- Singapore MOE under AcRF Tier 2 [ARC 26/13, MOE2013-T2-1-034]
- Singapore MOE under AcRF Tier 1 [RG 61/12]
- Singapore National Research Foundation
- Campus for Research Excellence And Technological Enterprise (CREATE) programme (Nanomaterials for Energy and Water Management)
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
- Key Science and Technology Innovation Team of Zhejiang Province [2010R50013]
- Foundation of State Key Laboratory of Coal Conversion [J14-15-909]
Highly active electrode materials with judicious design of nanostructure are important for the construction of high-performance electrochemical energy storage devices. In this work, we have fabricated a tubular TiC fibre cloth as an interesting type of stable supercapacitive material. Hollow microfibres of TiC are synthesized by carbothermal treatment of commercial T-shirt cotton fibres. To demonstrate the rationale of nanostructuring in energy storage, the hollow fibres are further covered by interwoven TiC nanotube branches, forming 3D tubular all-TiC hierarchical fibres with high electrical conductivity, high surface area, and high porosity. For energy storage functions, organic symmetric supercapacitors based on the hollow fibre-nanotube (HFNT) TiC cloth electrodes are assembled and thoroughly characterized. The TiC-based electrodes show very stable capacitance in long charge-discharge cycles and at different temperatures. In particular, the integrated TiC HFNT cloth electrodes show a reasonably high capacitance (185 F g(-1) at 2 A g(-1)), better cycling stability at high-rates (e.g., 97% retention at room temperature after 150000 cycles, and 67% at -15 degrees C after 50000 cycles) than other control electrodes (e.g., pure carbon fibre cloths). It is envisaged that this 3D tubular TiC fibre cloth is also useful for solar cells and electrocatalysis.
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