Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 34, Pages 10894-10898Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201804753
Keywords
covalent organic frameworks; fuel cells; membranes; nanostructures; proton conductivity
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Funding
- CSIR, Government of India
- DST Indo-Singapore Project [INT/SIN/P-05]
- DST Nano-mission Project [SR/NM/NS-1179/2012G]
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Poor mechanical stability of the polymer electrolyte membranes remains one of the bottlenecks towards improving the performance of the proton exchange membrane (PEM) fuel cells. The present work proposes a unique way to utilize crystalline covalent organic frameworks (COFs) as a self-standing, highly flexible membrane to further boost the mechanical stability of the material without compromising its innate structural characteristics. The as-synthesized p-toluene sulfonic acid loaded COF membranes (COFMs) show the highest proton conductivity (as high as 7.8x10(-2) Scm(-1)) amongst all crystalline porous organic polymeric materials reported to date, and were tested under real PEM operating conditions to ascertain their practical utilization as proton exchange membranes. Attainment of 24mWcm(-2) power density, which is the highest among COFs and MOFs, highlights the possibility of using a COF membrane over the other state-of-the-art crystalline porous polymeric materials reported to date.
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