期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 16, 期 4, 页码 1577-1584出版社
SPRINGER
DOI: 10.1007/s10008-011-1560-z
关键词
Vanadium redox battery; Nafion/TiO2 hybrid membrane; Hydrothermal method; Vanadium permeability; Electrochemical performance
资金
- National Basic Research Program of China (973 Program) [2010CB227201]
- National Science Foundation Committee of China [50972165]
To improve the performance of Nafion membrane as a separator in vanadium redox battery (VRB) system, a Nafion/TiO2 hybrid membrane was fabricated by a hydrothermal method. The primary properties of this hybrid membrane were measured and compared with the Nafion membrane. The Nafion/TiO2 hybrid membrane has a dramatic reduction in crossover of vanadium ions compared with the Nafion membrane. The results of scanning electron microscope, energy dispersive X-ray spectroscopy, and X-ray diffraction of the hybrid membrane revealed that the TiO2 phase was formed in the bulk of the prepared membrane. Cell tests identified that the VRB with the Nafion/TiO2 hybrid membrane presented a higher coulombic efficiency (CE) and energy efficiency (EE), and a lower self-discharge rate compared with that of the Nafion system. The CE and EE of the VRB with the hybrid membrane were 88.8% and 71.5% at 60 mA cm(-2), respectively, while those of the VRB with Nafion membrane were 86.3% and 69.7% at the same current density. Furthermore, cycling tests indicated that the Nafion/TiO2 hybrid membrane can be applied in VRB system.
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