Electrochemical investigation of uranium β-diketonates for all-uranium redox flow battery
Electrochemical investigation of uranium β-diketonates for all-uranium redox flow battery
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DOI：
10.1016/s0013-4686(02)00546-7
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发表时间：
2002-11
影响因子：
6.6
通讯作者：
T. Yamamura;Y. Shiokawa;H. Yamana;H. Moriyama
中科院分区：
文献类型：
--
作者：
T. Yamamura;Y. Shiokawa;H. Yamana;H. Moriyama
提出了在极性非质子溶剂中以铀为负极、正极活性材料的氧化还原液流电池。为了建立铀化合物作为活性材料的指导原则，对β-二酮铀配合物进行了以下方面的研究：（i）活性材料的溶解度，（ii）U（VI）和U（IV）β-二酮配合物的电极反应以及（iii）电池开路电压的估计。 U(VI)配合物在溶剂中的溶解度高于0.8 mol dm−3，U(IV)配合物在溶剂中的溶解度高于0.4 mol dm−3。首次研究了U(pta)4、UO2(dpm)2、UO2(fod)2和UO2(pta)2的电极反应，并对β-二酮铀的氧化还原电位进行了热力学讨论。使用 Hacac 或 Hdpm 估计开路电压超过 1 V。当使用碱度较大的配体时，预期开路电压较大。
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−3of U(VI) complexes and higher than 0.4 mol dm−3of a U(IV) complex were obtained in the solvents. The electrode reactions of U(pta)4, UO2(dpm)2, UO2(fod)2and UO2(pta)2were 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.