Journal
JOURNAL OF POWER SOURCES
Volume 480, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.228859
Keywords
Dual crosslinking; Imidazolium poly(aryl ether ketone); High temperature electrolyte membrane; Fuel cell
Funding
- Natural Science Foundation of China [51572044, 51603031]
- Liaoning Provincial Natural Science Foundation of China [20180550871, 2020-MS-087]
- Fundamental Research Funds for the Central Universities of China [N2005026]
- Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science [2019JH3/30100023]
Ask authors/readers for more resources
One critical issue to phosphoric acid (PA) doped high-temperature proton exchange membranes (HT-PEMs) is to balance the proton conductivity and mechanical properties for overall application performance in fuel cells. Addressing the issue, we prepare durable HT-PEMs having the dual crosslinking structure by employing poly (vinylimidazole-divinylbenzene-styrene) (poly(VIm-DVB-St)) copolymer as a crosslinker and using the poly (aromatic ether ketone) (PAEK) polymer containing four methyl groups as the host membrane matrix. The imidazole groups of poly(VIm-DVB-St) react with benzyl bromide groups of brominated PAEK for both the primary cross-linking network and high PA doping. The divinylbenzene crosslinked poly (styrene-co-vinylimidazole) network generates the secondary cross-linking structure. The formed reticular polymer chain structure brings on low swelling and high mechanical strength of the HT-PEMs. The fuel cell based on the acid doped PAEK41-85%VIm/233.0 PA shows a H-2-air fuel cell peak power density of 306 mW cm(-2) at 200 degrees C without back pressure, and a low degradation rate of 3.9 x 10(-5) V h(-1) during a period of 600 h under a constant current density of 200 mA cm(-2) at 160 degrees C.
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