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)[1] or direct-ethanol fuel cell (DEFC): 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[2] due to the low overpotentials associated with electrochemical reactions at high pH.[3] 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.
See also
- Alkaline fuel cell
- Artificial membrane
- Gas diffusion electrode
- Ion exchange
- Glossary of fuel cell terms
- Proton exchange membrane
- Alkaline Anion Exchange Membrane Fuel Cells
- Ion Exchange Membranes
References
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- ↑ Comparison of PVDF and FEP based radiation-grafted alkaline anionexchange membranes for use in low temperature portable DMFCs
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Anion Exchange Membrane and Ionomer for Alkaline Membrane Fuel Cells Archived December 7, 2008 at the Wayback Machine
