The invention discloses an
air cathode-based miniature direct
formic acid fuel
cell. A seal
washer is respectively arranged inside an
anode collector plate and a
cathode collector plate; a membrane
electrode is arranged between the two seal washers; one side, positioned on the
cathode collector plate, of the membrane
electrode is provided with a
cathode gas diffusion layer; one side, positioned on the
anode collector plate, of the membrane
electrode is provided with an
anode diffusion layer; an end plate is arranged outside the anode collector plate; a
liquid storage cavity is reserved between the anode collector plate and the end plate; and a seal
washer is arranged between the anode collector plate and the
liquid storage cavity as well as between the
liquid storage cavity and the end plate. In the
cell,
formic acid serves as a fuel; a
proton exchange membrane on which a catalyst is sprayed serves as the membrane electrode; an air electrode is adopted directly; the structure is simple; the
cell is convenient to detach; cell weight is reduced; reaction heat is collected effectively; the volatilization of the
formic acid is reduced by a relatively
closed system; and different
discharge requirements of equipment on a power supply can be met by adopting different catalysts.