Characterization of an electrochemical hydrogen pump with internal humidifier and dead-end anode channel

Yan Ming Hao, Hironori Nakajima, Hiroshi Yoshizumi, Akiko Inada, Kazunari Sasaki, Kohei Ito

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8 Citations (Scopus)


Electrochemical hydrogen pump (EHP) with an internal humidifier is reported. The internal humidifier contains liquid water stored in a vessel built in the cathode end plate, and the water directly wets a polymer electrolyte membrane (PEM). By using the internal humidifier, conductivity of the PEM is higher than that using a conventional vapor humidifier. A modeling of water transport is built to discuss the water balance in the membrane. Electrochemical impedance spectroscopy (EIS) is employed for analyzing the resistance components included in the EHP. In particular, the effects of compression ratio on resistance components are investigated.

Original languageEnglish
Pages (from-to)13879-13887
Number of pages9
JournalInternational Journal of Hydrogen Energy
Issue number32
Publication statusPublished - Aug 24 2016


All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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