锂空电池钙钛矿型镧锶钴氧分级介孔纳米线电催化性能与机理

项目名称： 锂空电池钙钛矿型镧锶钴氧分级介孔纳米线电催化性能与机理

项目编号： No.51272197

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 麦立强

作者单位： 武汉理工大学

项目金额： 80万元

中文摘要： 开发基于介孔纳米材料的高性能、复合化、低成本、绿色化的锂空电池是新能源技术和纳米技术的交叉和前沿。本项目拟基于材料设计，结合模板法、湿化学法、静电纺丝法等制备钙钛矿型镧锶钴氧介孔纳米线，并以此为电催化剂组装锂空电池和单根介孔纳米线器件。表征介孔纳米线的物相、形貌、界面结构、元素化学环境、光谱特征等，原位测试介孔纳米线的电输运与本征电化学性能。研究材料结构、孔分布、孔径大小、孔界面、比表面积、氧空位、小极化子分布、协同效应与锂离子扩散、电催化、电子传输、极化、充放电、循环可逆性等的相互关系，揭示载流子传输与电催化、锂空电池容量衰减的内在本质。通过材料的可控生长、分级构筑、均匀掺杂、性能调控、异质构建等提高纳米线的脱嵌锂性能，并采用遗传算法对结果进行优化，为新型介孔纳米线锂空电池的探索与开发奠定科学基础。

中文关键词： 锂空气电池；结构设计；电化学性能；原位表征；

英文摘要： Li-air batteries based on mesoporous nanomaterials with high performance, integration, low cost, and free-pollution is advanced and crossed areas of new-energy technique and nanotechnology. This proposal focuses on the design and preparation of LSCO nanowire by template method, wet chemistry method, electrospinning method and so on, which can be used as (1) the catalyst of electrochemical reaction of Li-air battery, (2) the construction of single mesoporous nanowire device. The characterization of the products, such as phase, morphology, interfacial structure, element chemical environment, spectral feature will be done. Further, we will investigate the relationship between the material structure, pore distribution, pore interface, pore size, specific surface area,oxygen vacancies , very small polarity distribution, synergistic effect, and Li ion distribution, electrocatalysis, electron transportation, electrochemical polarization, charge/discharge, cycling reversibility. Consequently, we will reveal the intrinsic character of carrier transport and electrocatalysis performance, capacity fading of Li-air battery. To improve the property of Li ion intercalation/disintercalation of the system, the approaches will be adopted by controlled synthesis of material, ordered construction, uniform doping, performance contro

英文关键词： Li-air battery；structure design；electrochemical performance；in-situ characterizations；