锂-空气电池阴极尖晶石纳米线/管阵列双功能催化剂的制备及其电化学性能研究

项目名称： 锂-空气电池阴极尖晶石纳米线/管阵列双功能催化剂的制备及其电化学性能研究

项目编号： No.21303114

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 田景华

作者单位： 苏州大学

项目金额： 25万元

中文摘要： 制备具有高效催化性能的催化剂和设计新型多孔电极结构是进一步提高锂-空气电池性能的关键。本项目提出以多孔阳极氧化铝（AAO）或聚碳酸酯（PC）为模板，选择含有合适化学计量比的金属离子混合溶液，结合电沉积和煅烧后处理制备具有双催化功能的AB2O4和掺杂型AxB1-xC2O4尖晶石纳米线/纳米管阵列，以及合金/尖晶石同轴纳米线/纳米管阵列。通过电化学、光谱和表面表征手段等，对这些纳米阵列催化剂材料的组分、物相、形貌和结构等进行系统的研究。将该纳米阵列催化剂直接与多孔集流体组装成开孔构型的阴极电极，通过循环伏安、旋转环盘电极等技术分析研究它们对ORR和OER的催化反应的影响及其催化机理。进一步研究其对锂-空气电池的充放电电位、容量、循环寿命和倍率特性等的影响，最终为制备高效锂-空气电池阴极催化剂和提高锂-空气电池性能提供实验和理论指导。

中文关键词： 锂-空气电池；金属氧化物；双功能催化剂；氧气还原反应；氧气析出反应

英文摘要： The fabrication of catalysts with high catalytic activity and designing of novel porous air electrode are the keys to improve the performance of lithium-air batteries. In this project,nanowires/tubes array of bifunctional spinel catalysts AB2O4,doped AxB1-xC2O4 and alloy/spinel coaxial structures will be fabricated within porous Anodic Aluminium Oxide (AAO) or polycarbonate (PC )templates, by electrodeposition in electroplating solution which contains suitable stoichiometric amounts of desired metal salts,and then post-heat treatment. The compositions, phases,structures and sizes of these nanocatalysts will be studied systematically with electrochemistry, spectroscopies and surface characterization techniques. The nanowires/tubes array of spinel catalysts will be assembled with porous current collector directly as air electrodes for Li-air battery. Their effects and mechanisms on the catalytic activity of the ORR and OER will be studied by CV, Rotating Ring-Disk Electrode and some other techniques. Furthermore, the performance of Li-air battery such as charge/discharge potential, capacity, cycling life and rate capability will be studied. Finally, an experimental and theoretical foundation will be provided for the preparation of the catalysts with high catalytic activity for the cathode of Li-air batteries and f

英文关键词： Lithium-air batteries；Metal oxides；Bi-functional catalysts；Oxygen reduction reaction；Oxygen evolution reaction