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Journal Articles

Electrochemical studies of uranium (IV) in an ionic liquid-DMF mixture to build a redox flow battery using uranium as an electrode active material

Ouchi, Kazuki; Komatsu, Atsushi; Takao, Koichiro*; Kitatsuji, Yoshihiro; Watanabe, Masayuki

Chemistry Letters, 50(6), p.1169 - 1172, 2021/06

https://doi.org/10.1246/cl.210060
 Times Cited Count：1 Percentile：6.77(Chemistry, Multidisciplinary)

The electrochemical behavior of uranium (IV) tetrachloride in ionic liquid-DMF mixture was studied for first time in order to build a redox flow battery (RFB) using U as an electrode active material. We found a quasi-reversible U$$^{III}$$/U$$^{IV}$$ couple that could be applied to the anode reaction of the RFB.

Oral presentation

Electrochemical behavior of uranium(IV) in ionic liquid-DMF mixtures

Ouchi, Kazuki; Komatsu, Atsushi; Takao, Koichiro*; Kitatsuji, Yoshihiro; Watanabe, Masayuki

no journal, , 

In this study, the electrochemical behavior of U(IV) in ionic liquid-DMF mixtures was investigated. DMF was added to the ionic liquid to reduce the viscosity to develop the redox flow battery (RFB) based on the reactions of U. The voltammogram of UCl$$_{4}$$ was measured. Redox waves at -1.6 and -1.5 V were observed based on the reaction of U(III)/U(IV). Further oxidation current of U(IV) was not observed at more negative potential than Cl$$^{-}$$ oxidation. We conclude that U(III)/U(IV) in ionic liquid-DMF mixture is applicable to the cathode reaction of RFB from these results.

Oral presentation

A Step toward sustainable future; Development of storage batteries, heat and radiation utilization and element utilization research using radioactive waste

Sugawara, Takanori

no journal, , 

JAEA has started R&Ds on recycling of radioactive waste since 2023. The R&Ds of "Storage Battery Utilization of Unburnable Uranium," "Power Generation by Heat and Radiation," and "Utilization of Elements in Spent Fuels" are being conducted. In this presentation, the background, purpose, technology, current status and future prospects for each item will be introduced.

Oral presentation

Electrochemical reaction of Uranium(IV) chloride in an ionic liquid-DMF mixture

Ouchi, Kazuki; Komatsu, Atsushi; Takao, Koichiro*; Kitatsuji, Yoshihiro; Watanabe, Masayuki

no journal, , 

The electrode reaction of uranium (IV) tetrachloride in an ionic liquid-DMF mixture was studied in order to build a redox flow battery (RFB) using U as an electrode active material. We found the quasi-reversible U(III)/U(IV) reaction that the formal potential is almost constant at -1.559 $$pm$$ 0.003 V. This reaction could be applied to the negative electrode reaction of the RFB.

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