ELECTROCHEMICAL DEVICE AND METHOD OF MANUFACTURING THE DEVICE

摘要

An electrochemical device, comprising gas diffused electrodes formed of a carbonaceous material having a catalyst formed at least partly on the surfac e thereof and an electrolytic membrane formed in contact with one side surface s of the gas diffused electrodes, wherein the amount of the catalyst formed at the portion of the carbonaceous material in contact with the electrolytic membrane is reduced smaller on the electrolytic membrane side than the amoun t on the opposite side of the electrolytic membrane side, whereby the use efficiency of the catalyst is remarkably increased and the efficiency of energy of the electrochemical device can be increased.