Electrochemical Intercalation of Oxide Superconductors and Mixed Metal Oxides with Perovskite and Related Structures

雅各布森大学9408742号休斯顿大学化学系Allan J.Jacobson博士在NSF/EPRI的电化学合成倡议下，得到化学部无机化学、生物无机和有机金属化学计划以及化学和运输系统司化学反应过程计划的支持，研究通过氧插层电化学合成高度氧化的混合金属氧化物。具体目标是促进对氧化物中氧插层的基本方面的了解，并评估插层化学在新氧化物材料的合成和加工中的使用。关于电化学可逆的La-Ni-O相的初步结果将被扩展，以确定氧插层的详细动力学。然后，这些研究将继续在三元铜氧化物上进行，其中物理性质将与成分的精确电化学控制相关。最后，该技术将应用于广泛的系统和电解液组成，以确定其普遍性。含有几种金属和氧的化合物有许多用途，包括用作电子和超导材料、陶瓷和玻璃。通常，这些固体的性质取决于它们的确切含氧量，而用目前可用的方法很难对其进行调节。在这个项目中，将开发一种新的技术，将氧气引入“混合金属氧化物”中，使用电化学方法。这将允许在相当温和的条件下形成非常富氧的物质。它还将允许精确控制氧含量，以便定制氧化物的属性。

9408742 Jacobson Univ. of Houston Dr. Allan J. Jacobson, Chemistry Department, University of Houston, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division and the Chemical Reaction Processes Program of the Chemical and Transport Systems Division, under the NSF/EPRI initiative on Electrochemical Synthesis, for the study of the electrochemical synthesis of highly oxidized mixed metal oxides via oxygen intercalation. Specific objectives are to advance the understanding of fundamental aspects of oxygen intercalation in oxides and to assess the use of intercalation chemistry for the synthesis and processing of new oxide materials. Preliminary results on an electrochemically reversible La-Ni-O phase will be extended to determine the detailed kinetics for oxygen intercalation. These investigations will then be continued on ternary copper oxides, where the physical properties will be correlated with precise electrochemical control of composition. Finally, the technique will be applied to a wide range of systems and electrolyte compositions to determine its generality. Chemical compounds which contain several metals and oxygen have a number of uses, including as electronic and superconducting materials, ceramics, and glasses. Often the properties of these solids depends upon their exact oxygen content, which is difficult to regulate using the methods which are presently available. In this project a new technique for introducing oxygen into a "mixed metal oxide" will be developed using an electrochemical method. This will permit the formation of very oxygen rich materials under quite mild conditions. It will also allow the oxygen content to be precisely controlled in order to tailor the properties of the oxide.