Application of thermal electrochemical equation to metal-hydride half-cell system
来源期刊：中南大学学报(英文版)2006年第2期
论文作者：刘开宇 黄伯云 张平民 贺跃辉 周科朝 苏耿
文章页码：146 - 150
Key words：hydrogen storage material; thermal electrochemical method; state of charge; application; change of enthalpy; internal resistance
Abstract: Application of thermal electrochemical equation to metal-hydride half-cell system was investigated, and the influence of state of charge on the thermal electrochemical performance of hydrogen storage materials was studied. The results show that both the absolute value of the molar enthalpy change and the internal resistance of evolution hydrogen reaction are less than that of absorption hydrogen reaction at the same state of charge. The molar reaction enthalpy change of absorption and evolution of hydride electrode change contrarily with the enhancement of filling degree of hydrogen in hydride electrode. The relation curve of molar reaction enthalpy change to state of charge, both absorption and evolution hydrogen reaction, is close to a constant when the state of charge is 10% 60%, and during state of charge below 10% or state of charge above 60%, the molar reaction enthalpy change varies sharply. Meanwhile, the internal resistance of electrode reaction has an ascending trend with the enhancement on filling degree of hydrogen in hydride electrode in both absorption and evolution hydrogen reaction.
