燃料電池MEAの熱劣化メカニズムの解明

概要

論文の詳細を見る
As a current state, a reactive mechanism and the deterioration mechanism of the fuel cells is not yet clarified before the practical use.The problem of deterioration in the fuel cells are "Durability of MEA", "Dissolution of platinum in catalyst" and "Surface corrosion of separator" etc. Then, the authors paid attention to the deterioration of MEA. The purpose of this paper is elucidation of the heat deterioration mechanism of MEA. Nafion film was heated with a hot press by three patterns of Normal, 70℃, and 150℃. And, MEA was analyzed by using ESCA. Consequently,the authors confirmed OH in the film heated at 150℃. The film generates the compound when reacting with nitrogen under the high temperature atmosphere. The OH is included in this compound. It has been understood that F structure of the film inside is attacked by OH, and it is deteriorated.The ratio of the active oxygen and oxygen in the Nafion film was calculated. Consequently, Oxides in the film contain about 5times from Normal in the state of 150℃.
宮崎大学の論文
2007-08-30