Currently

proton exchange membrane fuel cells(PEMFC)are the most widely used fuel cell technology.However

it has not commercialized yet due to its limitation to the PEMFC performance

life and cost.This paper reviews the current development status of the PEMFC technology

especially the PEMFC's performance

life and cost.Moreover

the application and existing problems of the PEMFC in such field as portable power

mobile power and stationary power generation are also analyzed.In view of the hydrogen facilities and economic development status in China

it points out that applying the PEMFC in stationary power generation may become a breakthrough point for commercialization

especially in mobile communications and data centers by using the PEMFC as a backup power source.