Fuel cells get chemical boost

摘要

HEAT HAS ALWAYS BEEN A PROB-lem for fuel cells.There's usually either too much,as with ceramic fuel cells for certain portable uses,such as automobiles or electronics,or too little as with polymer fuel cells to be efficient.While polymer electrolyte membrane(PEM)fuel cells are the most promising fuel cells for portable use,their low operating temperature and low efficiency have blocked their jump from promising technology to practical usage.