Carbon felt coated with titanium dioxide/carbon black composite as negative electrode for vanadium redox flow battery

Tung Mo Tseng, Rong Hsin Huang, Chung Yen Huang, Chung Chiun Liu, Kan Lin Hsueh, Fuh Sheng Shieu

研究成果: 雜誌貢獻期刊論文同行評審

72 引文 斯高帕斯(Scopus)

摘要

This investigation focuses on the effect of titanium dioxide (TiO 2) coatings of a carbon black (XC-72) negative electrode on the performance of a vanadium redox flow battery (VRFB). TiO2, a hydrophilic material, was added to the carbon electrode to improve the wettability and reduce the electrical resistance of the electrode surface. The electrochemical performances of homemade TiO2, commercial TiO 2, and carbon felt are investigated by using cyclic voltammetry and single-cell charge-discharge measurements. An electrode with 20 wt% of fabricated TiO2 loading at a scan rate of 0.006 V s-1 shows a specific capacitance (Cs,t) of 186.2 Fg-1, which is 55.5% and 12.2% higher than that of pure carbon electrode (119.7 Fg-1) and commercial TiO2 (166.0 Fg-1), respectively. At current density of 200 mA cm-2, the energy storage efficiency (εE = 65.4%) of the single cell with 20 wt% homemade TiO2/C-containing carbon felt negative electrode is 16.0% and 6.1% higher than that of the negative electrode with raw carbon felt (εE = 56.4%) and of the negative electrode containing commercial TiO2/C (εE = 61.6%), respectively. These results demonstrate the potential application of TiO2/C electrodes for high-efficiency VRFBs at high current densities.

原文???core.languages.en_GB???
頁(從 - 到)A1132-A1138
期刊Journal of the Electrochemical Society
161
發行號6
DOIs
出版狀態已出版 - 2014

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