Electrochemical investigation of uranium β-diketonates for all-uranium redox flow battery

Tomoo Yamamura; Yoshinobu Shiokawa; Hajimu Yamana; Hirotake Moriyama

doi:10.1016/S0013-4686(02)00546-7

Electrochemical investigation of uranium β-diketonates for all-uranium redox flow battery

Tomoo Yamamura, Yoshinobu Shiokawa, Hajimu Yamana, Hirotake Moriyama

Research output: Contribution to journal › Article › peer-review

87 Citations (Scopus)

Abstract

The redox flow battery using uranium as the negative and the positive active materials in polar aprotic solvents was proposed. In order to establish the guiding principle for the uranium compounds as the active materials, the investigation of uranium β-diketonate complexes was conducted on (i) the solubility of active materials, (ii) the electrode reaction of U(VI) and U(IV) β-diketonate complexes and (iii) the estimation of the open circuit voltage of the battery. The solubilities of higher than 0.8 mol dm^-3 of U(VI) complexes and higher than 0.4 mol dm^-3 of a U(IV) complex were obtained in the solvents. The electrode reactions of U(pta)₄, UO₂(dpm)₂, UO₂(fod)₂ and UO₂(pta)₂ were first studied and the redox potentials of uranium β-diketonates were thermodynamically discussed. The open circuit voltage is estimated more than 1 V by using Hacac or Hdpm. The larger open circuit voltage is expected when a ligand with the larger basicity is used.

Original language	English
Pages (from-to)	43-50
Number of pages	8
Journal	Electrochimica Acta
Volume	48
Issue number	1
DOIs	https://doi.org/10.1016/S0013-4686(02)00546-7
Publication status	Published - 2002 Nov 4
Externally published	Yes

Keywords

Aprotic solvents
Redox flow battery
Solubility
Uranium electrochemistry
Uranium β-diketonates

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

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10.1016/S0013-4686(02)00546-7

Cite this

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title = "Electrochemical investigation of uranium β-diketonates for all-uranium redox flow battery",

abstract = "The redox flow battery using uranium as the negative and the positive active materials in polar aprotic solvents was proposed. In order to establish the guiding principle for the uranium compounds as the active materials, the investigation of uranium β-diketonate complexes was conducted on (i) the solubility of active materials, (ii) the electrode reaction of U(VI) and U(IV) β-diketonate complexes and (iii) the estimation of the open circuit voltage of the battery. The solubilities of higher than 0.8 mol dm-3 of U(VI) complexes and higher than 0.4 mol dm-3 of a U(IV) complex were obtained in the solvents. The electrode reactions of U(pta)4, UO2(dpm)2, UO2(fod)2 and UO2(pta)2 were first studied and the redox potentials of uranium β-diketonates were thermodynamically discussed. The open circuit voltage is estimated more than 1 V by using Hacac or Hdpm. The larger open circuit voltage is expected when a ligand with the larger basicity is used.",

keywords = "Aprotic solvents, Redox flow battery, Solubility, Uranium electrochemistry, Uranium β-diketonates",

author = "Tomoo Yamamura and Yoshinobu Shiokawa and Hajimu Yamana and Hirotake Moriyama",

note = "Funding Information: We would like to thank Professor Hiroshi Tomiyasu of Shinshu University and Professor Yasuhisa Ikeda of Tokyo Institute of Technology for helpful discussions. We also acknowledge Dr. Kazuki Hasegawa of Institute for Materials Research, Tohoku University for his helpful ICP measurement. This work was performed at the Irradiation Experimental Facility, Institute for Materials Research, Tohoku University, and under the cooperative research program of the Institute for Materials Research, Tohoku University. This work is supported by the Nuclear Research Promotion Program (JANP) of the Japan Atomic Energy Research Institute and a Grant-in-Aid for Scientific Research from The Ministry of Education, Culture, Sports, Science and Technology.",

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doi = "10.1016/S0013-4686(02)00546-7",

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AU - Yamamura, Tomoo

AU - Shiokawa, Yoshinobu

AU - Yamana, Hajimu

AU - Moriyama, Hirotake

N1 - Funding Information: We would like to thank Professor Hiroshi Tomiyasu of Shinshu University and Professor Yasuhisa Ikeda of Tokyo Institute of Technology for helpful discussions. We also acknowledge Dr. Kazuki Hasegawa of Institute for Materials Research, Tohoku University for his helpful ICP measurement. This work was performed at the Irradiation Experimental Facility, Institute for Materials Research, Tohoku University, and under the cooperative research program of the Institute for Materials Research, Tohoku University. This work is supported by the Nuclear Research Promotion Program (JANP) of the Japan Atomic Energy Research Institute and a Grant-in-Aid for Scientific Research from The Ministry of Education, Culture, Sports, Science and Technology.

PY - 2002/11/4

Y1 - 2002/11/4

N2 - The redox flow battery using uranium as the negative and the positive active materials in polar aprotic solvents was proposed. In order to establish the guiding principle for the uranium compounds as the active materials, the investigation of uranium β-diketonate complexes was conducted on (i) the solubility of active materials, (ii) the electrode reaction of U(VI) and U(IV) β-diketonate complexes and (iii) the estimation of the open circuit voltage of the battery. The solubilities of higher than 0.8 mol dm-3 of U(VI) complexes and higher than 0.4 mol dm-3 of a U(IV) complex were obtained in the solvents. The electrode reactions of U(pta)4, UO2(dpm)2, UO2(fod)2 and UO2(pta)2 were first studied and the redox potentials of uranium β-diketonates were thermodynamically discussed. The open circuit voltage is estimated more than 1 V by using Hacac or Hdpm. The larger open circuit voltage is expected when a ligand with the larger basicity is used.

AB - The redox flow battery using uranium as the negative and the positive active materials in polar aprotic solvents was proposed. In order to establish the guiding principle for the uranium compounds as the active materials, the investigation of uranium β-diketonate complexes was conducted on (i) the solubility of active materials, (ii) the electrode reaction of U(VI) and U(IV) β-diketonate complexes and (iii) the estimation of the open circuit voltage of the battery. The solubilities of higher than 0.8 mol dm-3 of U(VI) complexes and higher than 0.4 mol dm-3 of a U(IV) complex were obtained in the solvents. The electrode reactions of U(pta)4, UO2(dpm)2, UO2(fod)2 and UO2(pta)2 were first studied and the redox potentials of uranium β-diketonates were thermodynamically discussed. The open circuit voltage is estimated more than 1 V by using Hacac or Hdpm. The larger open circuit voltage is expected when a ligand with the larger basicity is used.

KW - Aprotic solvents

KW - Redox flow battery

KW - Solubility

KW - Uranium electrochemistry

KW - Uranium β-diketonates

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Electrochemical investigation of uranium β-diketonates for all-uranium redox flow battery

Abstract

Keywords

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