Pressed and sintered electrodes for fuel cells - made from a mixt. of metal powder, ceramic powder and polymer powder rendered ion and electron conductive by ion beam treatment

摘要

The prodn. of shaped bodies, esp. electrodes for use in fuels cells and electrolytic cells, comprises subjecting a mixt. of metal powder, ceramic powder and polymer powder to ion beam treatment to render the powder mixt. ion and electron-conductive, pressing the powder mixt. and sintering. Pref. the powder is coated with catalytically active materials such as Pt, Pd, Ni, Ag and/or perovskites by means of ion beam. Pref. a high energy ion beam with an energy of 50-200 keV for implantation of elements and their cpds. is mixed with an ion beam with an energy of 50-3000 eV to provide a prim. and/or sec. coating of elements and their cpds. USE/ADVANTAGE - Use of powder mixt. which has been rendered ion- and electron conductive by ion beam treatment for the prodn. of pressed and sintered electrodes gives electrodes with high porosity and gas permeability together with good ion- and electron conductivity as required for use in fuel cells