(Invited) A Stability Study of Alkali Doped PBI Membranes for Alkaline Electrolyzer Cells | Zendy

Jens Oluf Jensen | Zendy; David Aili | Zendy; Martin Kalmar Hansen | Zendy; Qingfeng Li | Zendy; Niels J. Bjerrum | Zendy; Erik R. Christensen | Zendy

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(Invited) A Stability Study of Alkali Doped PBI Membranes for Alkaline Electrolyzer Cells

Author(s) -

Jens Oluf Jensen,

David Aili,

Martin Kalmar Hansen,

Qingfeng Li,

Niels J. Bjerrum,

Erik R. Christensen

Publication year - 2014

Publication title -

ecs transactions

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.235

H-Index - 52

eISSN - 1938-6737

pISSN - 1938-5862

DOI - 10.1149/06403.1175ecst

Subject(s) - membrane , electrolysis , conductivity , ionic conductivity , alkali metal , materials science , chemical engineering , aqueous solution , degradation (telecommunications) , alkaline water electrolysis , ionic bonding , chemical stability , electrochemistry , polymer chemistry , chemistry , electrode , electrolyte , organic chemistry , ion , electrical engineering , engineering , biochemistry

Polybenzimidazole membranes in a linear, a crosslinked and a thermally cured form were subjected to aging in 6 M aqueous KOH at 85 oC for periods of up to 176 days. The aged membranes were characterized with respect to weight loss, mechanical properties and ionic conductivity. The area specific conductivity was similar to a commercial Zirfon membrane and suitable for a water electrolyzer. Some chemical degradation was seen during the aging period, but the crosslinked and the cured materials were both integral after 176 days of aging. A simplified electrolyzer test cell was operated successfully.

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