| abstract |
The present invention relates to a metal (III) -chromium-phosphate complex represented by the formula M (III) x Cr (HPO 4 ) y (H 2 PO 4 ) z and its use, and more particularly to an organic comprising the same. An inorganic composite electrolyte membrane, a fuel cell electrode including the same, the organic / inorganic composite electrolyte membrane and / or a fuel cell membrane-electrode assembly (MEA) including the electrode, and a fuel cell to which the membrane-electrode assembly is applied will be.n n n The metal (III) -chromium-phosphate composite according to the present invention, and the organic / inorganic composite electrolyte membrane and the fuel cell electrode prepared using the same, exhibit high hydrogen ion conductivity under a wide temperature range including high temperature and no humidification conditions. There is no need for a post-treatment step using a strong acid, excellent chemical resistance and thermal stability, a small rate of decrease in ionic conductivity with the passage of the driving time, and increased activity of the catalyst by chromium in the component. |