Alkali doped poly (2,5-benzimidazole) membrane for alkaline water electrolysis: Characterization and performance

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F16%3A43902033" target="_blank" >RIV/60461373:22310/16:43902033 - isvavai.cz</a>
Result on the web
<a href="http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=17&SID=U1xdTQN4PSIYcD9LCk2&page=1&doc=2" target="_blank" >http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=17&SID=U1xdTQN4PSIYcD9LCk2&page=1&doc=2</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jpowsour.2016.02.032" target="_blank" >10.1016/j.jpowsour.2016.02.032</a>

Result language
angličtina
Original language name
Alkali doped poly (2,5-benzimidazole) membrane for alkaline water electrolysis: Characterization and performance
Original language description
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 (R) 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 degrees 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 degrees 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 degrees 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.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CG - Electrochemistry
OECD FORD branch
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Project
<a href="/en/project/7AMB13AR016" target="_blank" >7AMB13AR016: Optimisation of process of the energy conversion by means of water electrolysis and fuel cells with polymer electrolyte membrane.</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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