期刊
ELECTROCHIMICA ACTA
卷 132, 期 -, 页码 37-41出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.03.107
关键词
electrochemical performance; graphite felt; hydrogen-vanadium redox flow battery; hydrothermal method; tungsten trioxide
资金
- National High-Tech Research and Development Program of China (863 Plan) [2012AA052002]
- National Natural Science Foundation of China [21106012]
A novel graphite felt electrode modified with tungsten trioxide (WO3) was developed to improve the electrochemical performance of graphite felt toward the VO2+/VO2+ redox pair. WO3 was prepared using a hydrothermal method, and the morphology of WO3 structures was investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrochemical property of WO3-modified graphite felt toward VO2+/VO2+ was carefully characterized using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements. The hydrogen-vanadium redox flow battery (H-VRFB) test indicates that single cells using 1.1 mg cm(-2) WO3-modified graphite felt exhibited excellent performance at 70 mA cm(-2), and the corresponding coulombic, voltage, and energy efficiencies were 99.1%, 88.66% and 87.86%, respectively. (C) 2014 Elsevier Ltd. All rights reserved.
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