Ion-exchange synthesis of Co-functionalized titanate nanotubes and their application in electrochemical capacitors |
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| Authors: | Linrui Hou Changzhou Yuan Diankai Li Laifa Shen Xiaogang Zhang |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Shaoxing University, Huancheng West Road 508, Shaoxing 312000, Zhejiang, PR China;2. Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan;3. NAAM Research Group, King Abdulaziz University, Jeddah, Saudi Arabia;4. Biotechnology Research Group, Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia;5. Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, PR China |
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| Abstract: | Co-functionalized titanate nanotubes (Co-Ti-NTs) were successfully synthesized by means of an ion-exchange reaction. In contrast to the pristine titanate nanotubes (Ti-NTs), Co-Ti-NTs retained rich porous channels and owned even larger specific surface area and better electronic conductivity, which rendered electrons and OH? ions easily contact the Co species uniformly distributed on their surfaces for energy storage at high rates. The Co-Ti-NTs delivered a specific capacitance (SC) of 124 F g?1 at 0.4 A g?1, and a SC degradation of ca. 7% after 1500 continuous cycling at 3 A g?1, indicating that the Co-Ti-NTs were good candidates and/or even good supports for other electroactive materials for supercapacitors application. |
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