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

被引：86

作者：

Yamamura, T ^{[1
]}

Shiokawa, Y

Yamana, H

Moriyama, H

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Kyoto Univ, Inst Res Reactor, Kumatori, Osaka 5900494, Japan

[3] Kyoto Univ, Dept Nucl Engn, Sakyo Ku, Kyoto 6068501, Japan

来源：

ELECTROCHIMICA ACTA | 2002年 / 48卷 / 01期

关键词：

redox flow battery; uranium electrochemistry; uranium beta-diketonates; solubility; aprotic solvents;

D O I：

10.1016/S0013-4686(02)00546-7

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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 beta-diketonate complexes was conducted on (i) the solubility of active materials, (ii) the electrode reaction of U(VI) and U(IV) beta-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 beta-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; (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：43 / 50

页数：8