Refine your search�ソスF     
Report No.
 - 

Solid polymer electrolyte water electrolysis systems for hydrogen production based on our newly developed membranes, 2; Improvement in electrolysis efficiency by membrane-electrode assembling process

Yamaki, Tetsuya; Sawada, Shinichi; Asano, Masaharu; Terai, Takayuki*; Maekawa, Yasunari

We report herein the fabrication of membrane/electrode assemblies (MEAs) for efficient water electrolyzers based on our original fluoropolymer electrolyte membranes with variable ion exchange capacities. The MEAs with a well-defined interface were fabricated by hot-pressing the Pt-loaded carbon electrode/electrolyte membrane/Pt-loaded carbon electrode sandwich structure. Mostly, the hot-press applying a compaction pressure of 0.20 Pa at 60$$^{circ}$$C for 10 minutes provided apparently good MEAs in a reproducible fashion although the membrane with the highest ion exchange capacity (3.6 meq g$$^{-1}$$) failed to be manufactured due to a mechanical reason, i.e., its brittleness. The obtained findings undoubtedly indicate that the hot-press results in the markedly improved interface, thereby decreasing largely the ohmic overpotential. We were able to obtain the voltage-current characteristic comparable to the electrolyzer based on the commercially-available membranes; the energy efficiency was calculated to be 78% at a current density of 8 mA cm$$^{-2}$$.

Accesses

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.