報告題目：多電子轉換反應正極與高比能電池電化學

報 告 人：吳飛翔教授

報告時間：2021年1月8日星期五14:00

報告地點：將軍路校區新材料大樓A212

主辦單位：校科協、材料科學與技術學院

報告人簡介：

吳飛翔，中南大學教授，博士生導師，冶金+前沿科學中心副主任, 國家青年特聘專家，德國洪堡學者。本、碩、博畢業于中南大學冶金與環境學院，美國佐治亞理工學院聯合培養博士研究生，佐治亞理工學院Yushin教授課題組博士后研究員，德國馬普固體研究所Maier教授課題組研究員。主要從事材料化冶金、高比能二次電池關鍵材料設計與材料界面科學的應用基礎研究，主持國家級青年人才計劃、國家自然科學基金（青年）、中南大學創新驅動等項目。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等國際知名期刊上發表學術論文五十多篇，授權中國和國際發明專利共6項。目前擔任國際頂尖期刊MaterialsToday（IF：26.4）的副主編（AssociateEditor）和物理化學學報青年編委。聯系郵箱：feixiang.wu@csu.edu.cn

報告摘要：

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.