二次锂空气电池双功能催化剂作用机制研究

项目名称： 二次锂空气电池双功能催化剂作用机制研究

项目编号： No.21473040

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 分析化学

项目作者： 余爱水

作者单位： 复旦大学

项目金额： 85万元

中文摘要： 空气电极中双功能催化剂是影响二次锂空气电池整体性能的关键因素。本项目拟建立非水体系中空气电极催化机制和界面研究-双功能催化剂电极设计与调控-空气电极三相界面构筑及构效评估相结合的研究模式，从影响非水体系空气电极氧还原和氧化物分解反应机制的热力学入手，阐明双功能催化剂的作用机理和空气电极的失效机制，探索双功能催化电极的设计原理及调控因素等基本问题，从而更好地理解锂空气电池中空气电极氧还原和氧化物分解的动力学机制。同时，通过微观层次和分子水平上非水体系空气电极/界面反应过程的研究，阐明空气电极各组分之间的关联与其性能的关联。在优化双功能催化剂和空气电极结构的基础上，构筑非水体系二次锂空气电池体系，提升其电化学性能，特别是电池的充放电效率和循环性能。

中文关键词： 锂空气电池；双功能催化剂；空气电极；界面反应

英文摘要： Lot of works have been done in recent years to improve the electrochemical performance of lithium air batteries, however, for pratical applications, three hurdles must be overcome that are low energy efficiency, poor cyclability and rate capability. In lithium air battery system, bi-functional catalyst is the key factor to affect its electrochemical performance. In this proposal, we intent to establish a research model among the relationship of catalysis mechanism, interfacial reaction of air electrode in non-aqueous solution, design and preparation of bi-functional catalysts, and construction and electrochemical performance of air electrodes. We try to understand the oxygen reduction reaction and oxygen evolution reaction of bi-functional catalysts in non-aqueous solution from the thermodynamics point of view. The fading mechanism of bi-functional catalysts as well as air electrodes will be also analysized. Based on these, design and exploring new techniques to prepare catalyst materials,and applying them in air electrodes to improve their electrochemical performance in terms of energy effiency and cyclability.

英文关键词： lithium air battery;bi-functional catalysts;air electrode;interface reaction