报告题目：多电子转换反应正极与高比能电池电化学
报 告 人：吴飞翔教授
报告时间：2021年1月8日星期五14:00
报告地点：将军路校区新材料大楼A212
主办单位：校科协、材料科学与技术学院
报告人简介：
吴飞翔，中南大学教授，博士生导师，冶金+前沿科学中心副主任, 国家青年特聘专家，德国洪堡学者。本、硕、博毕业于中南大学冶金与环境学院，美国佐治亚理工学院联合培养博士研究生，佐治亚理工学院Yushin教授课题组博士后研究员，德国马普固体研究所Maier教授课题组研究员。主要从事材料化冶金、高比能二次电池关键材料设计与材料界面科学的应用基础研究，主持国家级青年人才计划、国家自然科学基金（青年）、中南大学创新驱动等项目。已在Chemical Society Reviews, AdvancedMaterials (5), Energy & Environmental Science (2),Advanced Energy Materials, Advanced Functional Materials, ACS Nano (3),Nature Communications, Nano Letters, Joule, Materials Today (2), Nano Energy(2), Journal of Materials Chemistry A, Journal of Energy Chemistry (2),Hydrometallurgy等国际知名期刊上发表学术论文五十多篇，授权中国和国际发明专利共6项。目前担任国际顶尖期刊MaterialsToday（IF：26.4）的副主编（AssociateEditor）和物理化学学报青年编委。联系邮箱：feixiang.wu@csu.edu.cn
报告摘要：
Commercial lithium-ion(Li-ion) batteries built with Ni- andCo-based intercalation-typecathodes suffer from low specificenergy, high toxicity and high cost. Further increase in the energy storagecharacteristics of such cells is challenging because capacities of suchintercalation compounds approach their theoretical values and further increasein their maximum voltage induces serious safety concerns. The growing market for portable energy storage is undergoing a rapid expansion as new applications demandlighter, smaller, safer and lower cost batteries to enable broader use of plug-in hybrid andpure-electric vehicles (PHEV and EV), drones and renewable energy sources, suchas solar and wind. Conversion-type cathode materials are someof the key candidates for the next-generation of rechargeable Li and Li-ionbatteries. Continuous rapid progress in performance improvements of suchcathodes is essential to utilize them in future applications. In this talk wewill consider price, abundance and safety of elements in theperiodic table for their use in conversion cathodes. Wefurther compare specific and volumetric capacities of a broadrange of conversion materials. By offering a model for practically achievablevolumetric energy density and specific energy of Li cells with graphite,silicon (Si) and lithium (Li) anodes, we observe the impact of cathodechemistry directly. This allows us to estimate potentials of differentconversion cathodes for exceeding the energy characteristics of cells builtwith state of the art intercalation compounds. We additionally discuss thekey challenges faced when using conversion-type active materials in cells andgeneral strategies to overcome them. Finally, we discuss ourrecent results on conversion cathode materials, including sulfur-based cathodesand metal fluorides.
