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Diagram of a PEM fuel cell. Proton-exchange membrane fuel cells (PEMFC), also known as polymer electrolyte membrane (PEM) fuel cells, are a type of fuel cell being developed mainly for transport applications, as well as for stationary fuel-cell applications and portable fuel-cell applications.
Proton exchange membrane (PEM) electrolysis is the electrolysis of water in a cell equipped with a solid polymer electrolyte (SPE) [3] that is responsible for the conduction of protons, separation of product gases, and electrical insulation of the electrodes.
Date/Time Thumbnail Dimensions User Comment; current: 15:39, 23 October 2010: 508 × 570 (9 KB): Albris {{Information |Description={{en|1=Diagram of a Proton exchange membrane fuel cell}} {{it|1=Schema di una Pila a combustibile con membrana a scambio protonico}} |Source={{own}} derived from w:Image:Solid oxide fuel cell.svg and [[w:Image:Fc diagram pem
The following other wikis use this file: Usage on ca.wikipedia.org Pila de combustible de membrana d'intercanvi de protons; Usage on fa.wikipedia.org
An improved generation of General Electric's PEM fuel cell was used in all subsequent Gemini missions, but was abandoned for the subsequent Apollo missions. [9] The fluorinated ionomer Nafion , which is today the most widely utilized proton-exchange membrane material, was developed by DuPont plastics chemist Walther Grot.
Whereas the common PEM fuel cell, also called Low Temperature Proton Exchange Membrane fuel cell (LT-PEM), must usually be operated with hydrogen with high purity of more than 99.9 % the HT-PEM fuel cell is less sensitive to impurities and thus is typically operated with reformate gas with hydrogen concentration of about 50 to 75 %.
Electro-chemical reaction Diagram of PEM MEA. A membrane electrode assembly (MEA) is an assembled stack of proton-exchange membranes (PEM) or alkali anion exchange membrane (AAEM), catalyst and flat plate electrode used in fuel cells and electrolyzers. [1] [2]
Fuel cells are classified by the type of electrolyte they use and by the difference in start-up time ranging from 1 second for proton-exchange membrane fuel cells (PEM fuel cells, or PEMFC) to 10 minutes for solid oxide fuel cells (SOFC). A related technology is flow batteries, in which the fuel can be regenerated by recharging.