Co(OH)₂/TiO₂ Nanotube Composite for High-Rate Performance Supercapacitor

Abstract:

The TiO₂ nanotube arrays were prepared on Ti plate by anodizing technology, and then Co (OH)₂ nanoparticles in-situ grew into TiO₂ nanotubes with "Tube-particle bonding" nanocomposited structure. Co (OH)₂ nanoparticles with a particle size of 40.5±8 nm were infiltrated in the TiO₂ nanotube arrays, and the Co (OH)₂ outside the tube presented a nanosheet structure. The specific capacitance of the Co (OH)₂/TiO₂ nanotube array composite reached 260 F/g at the current density~1 A/g. The capacity retention rate was 82.5 % after 2,000 cycles at the current density~5 A/g. The high-rate performance of the Co (OH)₂/TiO₂ nanotube array composite reached 210 F/g at the current density~10 A/g.

• Periodical: Materials Science Forum (Volume 1033)
• Pages: 116-120
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1033.116
• Online since: June 2021
• Authors: Xin Ren, Peng Tao Qi, Liang Du, Li Li Cheng, Zhi Liang Gao, Ming Wang*
• Keywords: Co (OH)₂ Nanoparticles, Electrochemical Properties, Supercapacitors, TiO₂ Nanotubes

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