Open AccessBlend Membranes Based on Acid-Base Interactions for Operation at High Methanol Concentrations
Author(s) -
J.K. Lee,
W. Li,
Arumugam Manthiram,
Michael D. Guiver
Publication year - 2008
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1.3005984
Subject(s) - ionomer , nafion , membrane , materials science , methanol , direct methanol fuel cell , methanol fuel , chemical engineering , polymer chemistry , membrane electrode assembly , ether , electrode , anode , composite material , polymer , chemistry , organic chemistry , electrochemistry , copolymer , biochemistry , engineering
The performances in direct methanol fuel cells (DMFCs) of membrane electrode assemblies (MEAs) fabricated with blend membranes based on sulfonated poly(ether ether ketone) (SPEEK) and poly(sulfone) bearing 2-amino-benzimidazole have been compared with SPEEK and Nafion ionomers in the anode and cathode catalyst layers as well as with that of MEAs fabricated with Nafion 115 membrane and Nafion ionomer in the electrodes. The SPEEK ionomer offers better compatibility with a lower interfacial resistance compared to Nafion ionomer when used with the blend membranes. Also, MEAs fabricated with the blend membrane and SPEEK ionomer in the electrodes exhibit better performance in DMFC compared to that with Nafion membrane and Nafion ionomer due to lower methanol crossover. Moreover, MEAs fabricated with the blend membranes exhibit less performance dependence on methanol concentration (1\u201310 M) compared to those fabricated with the Nafion membranes, making the former attractive to operate at high methanol-feed concentrations.Peer reviewed: YesNRC publication: Ye
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom