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Alkali anion exchange membrane
An alkali anion exchange membrane (AAEM) is a semipermeable membrane generally made from ionomers and designed to conduct anions while being impermeable to gases such as oxygen or hydrogen. This is their essential function when incorporated into a membrane electrode assembly (MEA) of a direct methanol fuel cell (DMFC)〔(Comparison of PVDF and FEP based radiation-grafted alkaline anionexchange membranes for use in low temperature portable DMFCs )〕 or direct-ethanol fuel cell (DEFC):〔(Direct ethanol fuel cells using alkaline anion exchange membrane )〕 separation of reactants and transport of anions.
==Advantages==
The advantage of the alkali anion exchange membrane in the fuel cell is the potential to use non-noble metals such as iron, cobalt or nickel〔(Platinum-free fuel cell developed in Japan )〕 due to the low overpotentials associated with electrochemical reactions at high pH.〔(Poly(phenylene)-based anion exchange membranes for alkaline fuel cells )〕〔(Anion Exchange Membrane and Ionomer for Alkaline Membrane Fuel Cells )〕 In comparison against alkaline fuel cell, alkali anion exchange membrane fuel cells also protect the electrode from solid carbonate precipitation, which can cause fuel (oxygen/hydrogen) transport problem during start-up.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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