Proton exchange membrane fuel cell with a movable membrane electrode assembly device

A proton exchange membrane fuel cell, comprising:

• a container, wherein the container comprise:
• an annular internal wall, wherein a reacting room is defined by the annular internal wall;
• an annular external wall surrounding the annular internal wall, wherein a storage room is defined between the annular internal wall and the annular external wall and divided into a fuel room and a waste room, the fuel room is in communication with the reacting room through a fuel inputting hole, and the waste room is in communication with the reacting room through a waste outputting hole;
• a bottom wall connecting the annular internal wall and the annular external wall;
• a top wall connecting the annular internal wall and the annular external wall,
• wherein a gas exchange hole is defined on the top wall;
• a fuel inputting door located on the fuel inputting hole;
• and
• a waste outputting door located on the waste outputting hole;
• and
• a membrane electrode assembly device located in the reacting room and dividing the reacting room into a first electrode space and a second electrode space, wherein the membrane electrode assembly device is movable in the reacting room so that volumes of the first electrode space and the second electrode space is variable, and the second electrode space is in communication with an outside atmosphere through the gas exchange hole.