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Application of thermal electrochemical equation to metal-hydride half-cell system

  • Liu Kai-yu Email author
  • Huang Bai-yun 
  • Zhang Ping-min 
  • He Yue-hui 
  • Zhou Ke-chao 
  • Su Geng 
Article

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.

Key words

hydrogen storage material thermal electrochemical method state of charge application change of enthalpy internal resistance 

CLC number

TE139+.7 

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Copyright information

© Central South University 2006

Authors and Affiliations

  • Liu Kai-yu 
    • 1
    • 2
    Email author
  • Huang Bai-yun 
    • 2
  • Zhang Ping-min 
    • 1
  • He Yue-hui 
    • 2
  • Zhou Ke-chao 
    • 2
  • Su Geng 
    • 1
  1. 1.School of Chemistry and Chemical EngineeringCentral South UniversityChangshaChina
  2. 2.State Key Laboratory of Powder MetallurgyCenteral South UniversityChangshaChina

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