Intermediate temperature electrical property of polyphenylene/Sn0.85Ga0.15P2O7 composite electrolyte
Yang Senlin, Wang Hongtao, Sheng Liangquan, Miao Hui
School of Chemical and Material Engineering,Fuyang Teachers College,Anhui Provincial Key Laboratory for Degradation and Monitoring of Pollution of the Environment,Fuyang 236041
Abstract: Firstly,the new organic-inorganic composite electrolyte PPO/Sn0.85Ga0.15P2O7 was prepared.XRD showed that there were only peaks corresponding well to Sn0.85Ga0.15P2O7,without any formation of other substances.SEM images showed that the electrolyte was sufficiently dense.The intermediate temperature conduction behavior was investigated by AC impedance spectroscopy in the temperature range of 100~350℃.The highest conductivity was observed to be 1.2×10-2 S/cm for SG15P-PPO in wet oxygen at 300℃.The ohmic resistance and interfacial polarization resistance of SG15P-PPO at 300℃ under open circuit condition was 8.69Ω·cm2 and 0.51Ω·cm2,correspondingly.The H2/O2 fuel cell generated the maximum power density of 60.5mW/cm2 at 0.54V.
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