membrane electrode units for direct methanol fuel cell (DMFC)

摘要

the present invention is particularly direct methanol fuel cells (DMFC) for an electrochemical device of the membrane electrode unit according to the will . The membrane electrode unit of the backing (that is , gas diffusion layers ) on the anode side and a cathode side with a different tightness (WT) comprises a . The anode backing should have a low water-tightness (ie , high water permeability ) than the cathode backing , where the WT _anode & WT _{The cathode} The anode is preferably the backing does not have a compensation layer ( micro- layer ), (10 wt 2 to based on the total weight . - %), Having a low content of water-repellent agent , the total pore volume is higher than the caviar sauce backing (V _Tot ) has . The production of the membrane electrode unit are improved DMTC fuel cell acting as an aqueous methanol solution .