Patent ID: 7378171

Claim:
A fuel cell, comprising: a membrane electrode assembly adapted for generating electricity by a predetermined amount of fuel and air chemically reacted; a fuel storage reservoir communicated with said membrane electrode assembly and adapted for storing said fuel to supply to said membrane electrode assembly for generating said electricity; an air supply unit communicated with said membrane electrode assembly for supplying said air with a predetermined pressure to said membrane electrode assembly for generating said electricity, wherein said air is naturally drawn from ambient atmosphere so as to contain dirt particles and organic oily molecules; a temperature regulator communicated with said membrane electrode assembly to control a temperature therein for ensuring efficient generation of said electricity; and a particulates blocking device which is connected with said membrane electrode assembly and comprises an multi-layer air filtering unit communicated with said air supply unit, wherein said air filtering unit comprises a particle filter layer having a plurality of porous gratings formed thereon for allowing said dirt particles which are smaller than a size of said gratings to pass therethrough, and a molecular filler layer having a plurality of filler grains chemically bound together for absorbing said organic oily molecules so as to block said organic oily molecules from entering into said membrane electrode assembly for maximizing an efficiency of said fuel cell.