Identifying liquid water and ice in model PEMFCs with high temporal-spatial resolutions using energy-selective neutron imaging

Song, F.; 樋口 雄紀*; 加藤 悟*; 吉宗 航*; 日比 章五*; 野崎 洋*; 廣井 孝介  ; 高田 慎一  ; 篠原 武尚   

Song, F.; Higuchi, Yuki*; Kato, Satoru*; Yoshimune, Wataru*; Hibi, Shogo*; Nozaki, Hiroshi*; Hiroi, Kosuke; Takata, Shinichi; Shinohara, Takenao

In our previous works, freezing and thawing of water in a full-sized fuel cell used in a commercial vehicle during cold-starts and shut-downs have been successfully observed from the through-plane direction using the energy selective neutron imaging (ESNI). To further clarify the icing mechanism in cell, observation of the cell cross-section is necessary. ESNI was conducted on miniature model cells to visualize the freezing processes within the cell cross-section. In the presentation, the development of ESNI in RADEN and the latest cross-sectional ESNI result are demonstrated. The potential and challenges of the technology is discussed.