Hi, yuan, you can probably talk more about the application, I mean, the application of polarization in various field except solid oxide fuel cell. For example. it can be used in Liquid Crystal Display(LCD). For LCD, it is composed of two polarizers that transmit light in perpendicular directions, a mirrored surface and a layer of liquid crystal material that is sandwiched between two electrically conducting glass plates.
Polarization of Materials / Discussion
This is the discussion related to the wiki page Polarization of Materials.