Preparation and Characterization of Mesoporous MIEC Electrodes for Solid-State Ionic Devices

在这个项目中，新一代固态离子器件的设计策略是使用混合离子电子传导（MIEC）和非结构化界面的介孔电极。 介孔或纳米结构材料提供的优点包括显著增加的活性表面积，用于快速电极动力学，显著增加的缺陷数量，用于快速质量和电荷转移的较短扩散长度，以及用于催化的表面改性的增加的灵活性。 本提案的目的是开发一种合成和处理程序，用于使用液晶模板机制和溶胶-凝胶过程制备介孔MIEC电极和纳米结构界面。 该研究将导致更深入地了解介孔MIEC电极的原理，包括在固体MIEC中的离子和电子缺陷的同时传输，MIEC孔中的气体传输，以及MIEC/气体界面处的反应动力学。 对介孔MIEC电极和纳米结构界面的合成、加工和性质的基本理解对于新一代固态离子器件的合理设计是必不可少的。 该项目可能会对能源效率和环境质量产生重大影响。

In this project the strategy in the design of a new generation of solid-state ionic devices is the use of mesoporous electrodes of mixed ionic-electronic conductions (MIEC) and nonostructured interfaces. The advantages offered by mesoporous or nanostructured materials include dramatically increased active surface areas for fast electrode kinetics, a significantly increased populaiton of defects , shorter diffusion lengths for rapid mass and charge trnasport, and increased flexibility in surface modificaiton for catalysis. The objective of this proposal is to develop a synthesis and processing procedure for preapartion of mesoporous MIEC electrodes and nanostructured interfaces using a liquid crystal templating mechanism and a sol-gel process. The study will result in a deeper understanding of the principles of mesoporous MIEC electrodes, including simultaneous transport of ionic and electronic defects in the solid MIEC, gas transport throught he pores of the MIEC, and the reaction kinetics at the MIEC/gas interface. A fundamental understanding of synthesis, processing, and properties of mesoporous MIEC electrodes and nanostructured interfaces is essential to the rational design of a new generation of solid-state ionic devices. This project will potentially have a significant impact of energy efficiency and environmental quality.