Influence of the sintering of electrocatalysts and decrease of proton conductivity on the current-voltage performance in the high-temperature proton exchange membrane fuel cells (HT-PEMFC)

Ai Suzuki, Mark Williams, Yuka Oono, Ryuji Miura, Nozomu Hatakeyama, Michio Hori, Akira Miyamoto

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

The influence of the sintering of electrocatalysts and decrease of the proton conductivity on the current-voltage performance in the HT-PEMFC was theoretically evaluated under the non-humid conditions at 150 °C, 170 °C and 190 °C. Decreasing rate of the proton conductivity was evaluated based on the tortuosity of the proton pass. The more the phosphoric acid was evaporated with a rise in temperature, the proton path found to become more tortuous and the proton conductivity was accordingly estimated to be decreased. A theoretical breakdown of the voltage drops indicated that the sintering of the electrocatalyst influenced on the voltage drop in earlier several hundreds of hours. The following voltage drop in the latter stage was caused mainly due to the decrease in the proton conductivity.

Original languageEnglish
Pages (from-to)7-22
Number of pages16
JournalECS Transactions
Volume61
Issue number13
DOIs
Publication statusPublished - 2014 Jan 1
EventSymposium on Computational Studies on Battery and Fuel Cell Materials - 225th ECS Meeting - Orlando, United States
Duration: 2014 May 112014 May 15

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Influence of the sintering of electrocatalysts and decrease of proton conductivity on the current-voltage performance in the high-temperature proton exchange membrane fuel cells (HT-PEMFC)'. Together they form a unique fingerprint.

Cite this