探索锂-空气电池非化学计量氧化物与导电氧化物复合双功能氧（空气）电极催化剂制备与表征

锂-空气电池具有高的理论比能量和诱人的应用前景，是清洁能源研究的重要方向之一。目前锂-空气电池的碳基氧（空气）电极表面存在碳酸盐沉积是直接影响电池性能的问题之一。本项目探索运用物理化学原理和方法进行实验设计，并利用光化学金属有机化合物沉积（PMOD）方法，使有确定组成的有机前躯体在导电Ti-O化合物表面沉积出非化学计量MeOx（Me为 Co、Mn、Fe、Ni及它们的二元或三元组合），制备出MeOx∕导电Ti-O化合物复合材料；用近代物理测试手段和电化学性能测试方法研究MeOx∕导电Ti-O化合物复合材料的微观结构、形态、尺寸和组成对电化学性能的影响，并研究MeOx∕导电Ti-O化合物复合材料作为氧（空气）电极催化剂对氧还原ORR和氧析出OER反应的催化作用和催化机理。以期能制备出具有良好导电性、高稳定性的双功能非碳基催化剂材料，为发展锂-空气电池氧（空气）电极提供一些理论和技术基础。

Li-Air battery has attractively potential application because of its high theoretical energy density. Li-Air battery is one of the most important trends in the research of clean energy. Carbonate deposition on the surface of carbon based oxygen (air) electrode is the one of direct reasons of the degradation of the oxygen (air) electrode properties in the research of Li-Air battery. Based on the principle of physical chemistry, this proposal wants to design and prepare a new kind of composite oxides. Photochemical metal-organic deposition (PMOD) method will be applied to deposit nonstoichiometric oxides MeOx (Me stands for Co, Ni, Fe, Mn and their binary or ternary system) on the surface of electron conductive Ti-O compound. The MeOx/electron conductive Ti-O compound composite material is syntheized. Modern physical and electrochemical analysis methods will be applied in MeOx/electron conductive Ti-O compound composite material. The effects of microstructure, micro-morpholology, size and composition on electrochemical properties will be investigated. The catalystic properties and mechanism of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) processes at oxygen (air) electrode will be discussed also. This proposal expects to synthesis a kind of composite oxide catalyst for oxygen (air) electrode in Li-Air (oxygen) battery with high electron conductivity and high catalytic properties of ORR and OER. It would be some fundamentally theoretical and technical works for the developing of Li-Air battery.