金属氧化物的快速氢化及其在钠离子电池中的应用

项目名称： 金属氧化物的快速氢化及其在钠离子电池中的应用

项目编号： No.21506077

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 邱静霞

作者单位： 江苏大学

项目金额： 21万元

中文摘要： 先进能源材料和能源存储系统关系着我国经济和生活的命脉。开发适合钠离子嵌入/脱出的电极材料与工艺一直是二次电池研究领域的前沿方向。当前由于电池材料本身钠离子嵌入/脱出传输能力缓慢和导电性不足的限制，钠离子电池的发展远落后于锂离子电池。氢化是一种简单、易操作、成本效益高的技术，可提高材料的电子导电性和修饰晶体结构。本项目拟以高温高压快速氢化技术修饰金属氧化物，拓宽离子传输通道，增强其在电化学过程中的导电能力。修饰处理过的电极材料将应用于钠离子电池，以期大幅度降低电池的成本并提升其能量和功率密度。本项目系统研究氢化过程对材料物质结构的物化性质的影响、及与能源储存性能之间的定量构效关系，探求并阐述氢化对各种电极材料的作用机理，为生产实现低成本，高能量密度、以及大功率密度二次电池奠定基础。另外，氢化技术可以直接导入现代化电极材料生产工艺并用于大批量生产。

中文关键词： 钠离子电池；氢化；金属氧化物；高温高压；电化学

英文摘要： Energy production and storage have become key issues concerning our welfare in economics and daily life. To explore emerging technology and materials for sodium-ion battery could be a promising direction for next-generation rechargeable batteries. Due to the limitation of conductivity and slow sodium ion diffusion of current battery materials, the development of sodium-ion battery is far behind lithium-ion batteries. Hydrogenation is a simple, efficient and cost-effective way for tailoring the electronic and morphological properties of the nanostructured materials. The technology improves the ionic mass transport of the semiconductors as well as the electronic conductivity of the pristine materials; consequently improve the electrochemical performance of sodium-ion batteries. In this project, a series of electrode materials such as SnO2, MnO2, MoO3, Fe2O3, Na2Ti3O7 will be subject to the hydrogenation treatment for sodium-ion batteries. The effectiveness of the hydrogenation process to the electrochemical crystalline structure, electrochemical behavior and performance will be systematically investigated. It is expected that this technology could tackle the barriers of the emerging modern batteries, such as the insufficient energy and power density, relatively high cost and poor cycle life performance of next-generation rechargeable batteries. Furthermore, this process can be readily scaled up for mass production and directly incorporated into the modern battery manufacturing process without the need to change existing industrial fabrication formulae and processes for energy conversion and storage applications.

英文关键词： Sodium-ion battery;Hydrogenation;Metal oxides;High temperature and high pressure;Electrochemistry