Li/CO2-O2和Li/CO2电池分级多孔NiO/石墨烯正极的构建及电化学性能研究

项目名称： Li/CO2-O2和Li/CO2电池分级多孔NiO/石墨烯正极的构建及电化学性能研究

项目编号： No.51502082

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 董红玉

作者单位： 河南师范大学

项目金额： 21万元

中文摘要： 发展高比能量电池是电化学储能器件研究的前沿课题之一。Li/CO2-O2和Li/CO2电池比能量高、环境友好，然而正极放电产物Li2CO3难分解、电池极化严重，导致其循环寿命短、功率性能差。研究形貌、结构与电极性能的关系，是改善Li/CO2-O2和Li/CO2电池性能的关键。因此，本项目提出设计组装分级多孔NiO/石墨烯正极，拟采用水热法和微波技术构建分级多孔NiO/石墨烯材料，研究合成方法对材料的形貌、组成以及结构的调控规律，研究上述材料构筑的正极在电池中的电性能，研究材料形貌、组成以及结构与正极电性能相互关系并确定影响电性能的关键因素，探讨相关电化学反应机理，为高比容量、高循环稳定性的Li/CO2-O2和Li/CO2电池正极材料的设计提供研究依据。

中文关键词： Li/CO2-O2电池；复合材料；正极；分级结构；电化学

英文摘要： Development of high specific batteries has become one of the leading topics in the research field energy storage devices. Rechargeable Li/CO2-O2 and Li/CO2 batteries offers a promise for very high energy density. However, to make this happen, major fundamental scientific breakthroughs are needed that could address various bottlenecks associated with their poor cycle life and power performance. It is because of serious polarization and difficult-to-decompose Li2CO3. Therefore, it is very important to study the influences of morphology and structure on cathode. As a consequence, hierarchical porous material (nickel oxide/graphene, NiO/graphene) will be prepared in this work.The hierarchical porous NiO/graphene will be synthesized by hydrothermal method and microwave radiation. Firstly, the regulation effects of the preparation methods on the morphlogy, composition and structure of NiO/graphene material will be studied in detail. Secondly, electrochemical perfor-mance of cathode made of NiO/graphene will be studied by various test methods. Thirdly, the relationship between cathode electrochemical performance and the morphlogy, composition and structure of material. The important factors affecting the electrochemical performance of the materials and the corresponding mechanism of electrochemical reaction will be discovered. And a theoretical technical foundation for high energy density, long cycle life cathode of Li/CO2-O2 and Li/CO2 batteries will be established.

英文关键词： Li/CO2-O2 battery;composite material;cathode;hierarchy;electrchemistry