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

9408742 Jacobson休斯顿大学Allan J. Jacobson博士，休斯顿大学化学系，由化学系的无机，生物无机和有机化学计划以及化学和运输系统系的化学反应过程计划支持，根据NSF/EPRI关于电化学合成的倡议，用于研究通过氧嵌入的高度氧化的混合金属氧化物的电化学合成。具体的目标是推进氧化物中的氧嵌入的基本方面的理解，并评估使用嵌入化学的合成和处理新的氧化物材料。电化学可逆的La-Ni-O相上的初步结果将被扩展到确定氧嵌入的详细动力学。这些调查将继续对三元铜氧化物，其中的物理性能将与精确的电化学控制的组合物。最后，该技术将被应用到广泛的系统和电解质组合物，以确定其通用性。 含有几种金属和氧的化合物有许多用途，包括电子和超导材料，陶瓷和玻璃。这些固体的性质通常取决于其确切的氧含量，而使用目前可用的方法很难对其进行调节。在这个项目中，将使用电化学方法开发一种将氧引入“混合金属氧化物”的新技术。这将允许在相当温和的条件下形成非常富氧的材料。它还将允许精确控制氧含量，以定制氧化物的性质。

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.