Artículo
Alkali doped poly (2,5-benzimidazole) membrane for alkaline water electrolysis: Characterization and performance
Díaz, Liliana Alicia; Hnát, Jaromír; Heredia, Nayra; Bruno, Mariano Martín
; Viva, Federico Andrés
; Paidar, Martin; Corti, Horacio Roberto
; Bouzek, Karel; Abuin, Graciela Carmen
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Fecha de publicación:
04/2016
Editorial:
Elsevier Science
Revista:
Journal of Power Sources
ISSN:
0378-7753
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The properties and performance of linear and cross-linked KOH doped ABPBI membranes as electrolyte/separator for zero gap alkaline water electrolysis cells are evaluated and compared with a commercial Zirfon® diaphragm. Stability in alkaline environment, swelling, thermal properties, water sorption, KOH uptake and conductivity of linear (L-ABPBI) and cross-linked (C-ABPBI) membranes doped with different concentrations of KOH are analyzed. Linear membranes show stability up to 3.0 mol·dm−3 KOH doping, while cross-linked membranes are stable up to 4.2 mol·dm−3 KOH doping. Both kinds of membranes exhibit good thermal stability and reasonable specific ionic conductivity at 22 °C in the range between 7 and 25 mS·cm−1, being slightly higher the conductivity of C-ABPBI membranes than that of L-ABPBI ones. In short-term electrolysis tests both L-ABPBI and C-ABPBI membranes show better performance than Zirfon diaphragm in the range from 50 to 70 °C. A current density of 335 mA·cm−2 at a cell voltage of 2.0 V is attained with C-ABPBI membranes doped in 3 mol·dm−3 KOH at 70 °C, a performance comparable with that of commercial units operating at temperatures ca. 80 °C and 30 wt% KOH (6.7 mol·dm−3) as electrolyte.
Palabras clave:
Abpbi
,
Membranes
,
Electrolyzers
,
Water Electrolysis
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Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Díaz, Liliana Alicia; Hnát, Jaromír; Heredia, Nayra; Bruno, Mariano Martín; Viva, Federico Andrés; et al.; Alkali doped poly (2,5-benzimidazole) membrane for alkaline water electrolysis: Characterization and performance; Elsevier Science; Journal of Power Sources; 312; 4-2016; 128-136
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