Effect of PTFE content in gas diffusion layer based on Nafion®/PTFE membrane for low humidity proton exchange membrane fuel cell

Autor:	Chien Kung Lin, Jie Cheng Tsai
Rok vydání:	2011
Předmět:	Materials science General Chemical Engineering Analytical chemistry Proton exchange membrane fuel cell Humidity General Chemistry Microporous material Cathode law.invention Anode chemistry.chemical_compound Membrane chemistry Chemical engineering law Nafion Gaseous diffusion
Zdroj:	Journal of the Taiwan Institute of Chemical Engineers. 42:945-951
ISSN:	1876-1070
DOI:	10.1016/j.jtice.2011.05.008
Popis:	This research was carried out to prepare high performance membrane-electrode assembly for proton exchange membrane fuel cell at low humidity condition. It had investigated the effect of the Nafion ® /PTFE proton exchange membrane, impregnating porous PTFE membrane with Nafion ® solution, in the gas diffusion medium and microporous layer on the cell performance under various humidity conditions. The Nafion ® /PTFE decreases the back diffusion distance of product water from cathode to anode side at low humidity condition, caused by the property of high tensile strength. It is found that the optimum PTFE content is 40 wt% of the gas diffusion medium and 30 wt% of the microporous layer at low humidity condition, respectively. The optimum PTFE treatment in the two layers can facilitate the reactant gas and the back diffusion of product water from cathode side to anode side to provide sufficient proton conductivity of membrane. The highest current density was 955 mA/cm 2 occurred at the cell potential of 0.6 V.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::31e86e78153d68326470da24aeea77d0 https://doi.org/10.1016/j.jtice.2011.05.008 Zobrazit plný text záznamu Full Text from ScienceDirect