Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 11, Pages 6076-6085Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202012079
Keywords
bismuth oxide clusters; hybridization; Nafion; power density; proton exchange membranes
Categories
Funding
- National Natural Science Foundation of China [21871042, 21471028, 21671036, 22073094]
- Changbai Mountain Scholarship
- Natural Science Foundation of Jilin Province [20200201083JC]
- Natural Science Foundation of Department of Education of Jilin Province [JJKH20201169KJ]
- Jilin Provincial Department of Education
- Computing Center of Jilin Province
- International Research Centre for Nano Handing and Manufacturing of China
- Network and Computing Center of CIAC, CAS
Ask authors/readers for more resources
By precisely hybridizing nano-scaled bismuth oxide clusters into Nafion, a high-performance hybrid membrane, Nafion-Bi-12-3 %, was fabricated, showing excellent proton conductivity and mechanical stability ideal for high-performance PEM fuel cells. Molecular dynamics simulation was employed to clarify the structural properties and assembly mechanisms of the hybrid membrane at the molecular level. The hybrid membrane exhibited a maximum current density of 432.7 mA cm(-2) and power density of 110.2 mW cm(-2) for direct methanol fuel cells, providing new insights into the design of functional polymer electrolyte membranes through polyoxometalate hybridization.
Fabricating proton exchange membranes (PEMs) with high ionic conductivity and ideal mechanical robustness through regulation of the membrane microstructures achieved by molecular-level hybridization remains essential but challenging for the further development of high-performance PEM fuel cells. In this work, by precisely hybridizing nano-scaled bismuth oxide clusters into Nafion, we have fabricated the high-performance hybrid membrane, Nafion-Bi-12-3 %, which showed a proton conductivity of 386 mS cm(-1) at 80 degrees C in aqueous solution with low methanol permeability, and conserved the ideal mechanical and chemical stabilities as PEMs. Moreover, molecular dynamics (MD) simulation was employed to clarify the structural properties and the assembly mechanisms of the hybrid membrane on the molecular level. The maximum current density and power density of Nafion-Bi-12-3 % for direct methanol fuel cells reached to 432.7 mA cm(-2) and 110.2 mW cm(-2), respectively. This work provides new insights into the design of versatile functional polymer electrolyte membranes through polyoxometalate hybridization.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available