Material transport characteristics in Mo electrode for low temperature Alkali Metal Electric Conversion

Tanaka, Kotaro; Nakagiri, Toshio  ; Takahiro, Fujii; Takeo, Honda

Material transport characteristics in Molybdenum (Mo) electrode for low temperature Alkali Metal Electric Conversion (AMTEC) at about 900K, were evaluated. It is known that Mo electrode shows superior sodium transport performance compared with other electrode materials because of ion conductive material in Mo electrode. In this study, morphology factor "G" which was related to impedance for sodium transport was confirmed to be effective to evaluate sodium transport performance, in the experiments using the SETC (Sodium Exposure Test Cell) at 900K - 1,050K. Evaluated power density in the case of Mo electrode at 900K was 50% higher than that of TiN electrode; therefore, the possibility of higher performance electrode for low temperature AMTEC at about 900K was confirmed.