TY - GEN
T1 - PTFE-based high-temperature proton-conducting membrane
AU - Reichman, S.
AU - Ulus, A.
AU - Peled, E.
PY - 2006
Y1 - 2006
N2 - The demand for a Solid Polymer Electrolyte Membrane (SPEM) for fuel-cell systems, capable of withstanding temperatures above 130°C, decreasing the electrode-catalyst loadings and reducing poisoning by carbon monoxide, has prompted this study. A novel, low-cost, highly conductive, nanoporous proton-conducting membrane (NP-PCM) based on a polytetrafluoroethylene (PTFE) backbone has been developed. It comprises a non-conductive nano-size ceramic powder, PTFE binder and an aqueous acid. Impregnation of the ceramic powder into the membrane substrate was carried out by sol-gel synthesis. The preparation procedures were studied and the membrane was characterized with the use of: PSD, SEM, EDS, DSC, FTIR and electrochemical methods. A non-optimized direct-methanol fuel cell (DMFC) with a 137 μm-thick membrane was assembled. It demonstrated 133 mW.cm-2 at 80°C, 0.05 atm. dry air (1.9 stoich Future study will be directed to optimizing the Membrane-Electrode- Assembly (MEA) preparation process and testing of both DMFCs and H 2-FCs at high temperatures. copyright The Electrochemical Society.
AB - The demand for a Solid Polymer Electrolyte Membrane (SPEM) for fuel-cell systems, capable of withstanding temperatures above 130°C, decreasing the electrode-catalyst loadings and reducing poisoning by carbon monoxide, has prompted this study. A novel, low-cost, highly conductive, nanoporous proton-conducting membrane (NP-PCM) based on a polytetrafluoroethylene (PTFE) backbone has been developed. It comprises a non-conductive nano-size ceramic powder, PTFE binder and an aqueous acid. Impregnation of the ceramic powder into the membrane substrate was carried out by sol-gel synthesis. The preparation procedures were studied and the membrane was characterized with the use of: PSD, SEM, EDS, DSC, FTIR and electrochemical methods. A non-optimized direct-methanol fuel cell (DMFC) with a 137 μm-thick membrane was assembled. It demonstrated 133 mW.cm-2 at 80°C, 0.05 atm. dry air (1.9 stoich Future study will be directed to optimizing the Membrane-Electrode- Assembly (MEA) preparation process and testing of both DMFCs and H 2-FCs at high temperatures. copyright The Electrochemical Society.
UR - http://www.scopus.com/inward/record.url?scp=33845234997&partnerID=8YFLogxK
U2 - 10.1149/1.2214489
DO - 10.1149/1.2214489
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AN - SCOPUS:33845234997
SN - 1566774969
SN - 9781566774963
T3 - ECS Transactions
SP - 189
EP - 198
BT - Proton Exchange Membrane Fuel Cells V, In Honor of Supramaniam Srinivasan
PB - Electrochemical Society Inc.
T2 - 208th Meeting of the Electrochemical Society
Y2 - 16 October 2005 through 21 October 2005
ER -
