報告題目：Ion Transport in Lithium-Ion Conducting Solid Electrolytes: Oxides and Composites

報 告 人：郭新

報告時間：2019年11月7日 9:00-10:00

報告地點：將軍路校區8號樓 8311

主辦單位：校科協、材料科學與技術學院、江蘇省高效電化學儲能技術重點實驗室

報告摘要：A solid-state battery is a battery technologythat uses solid electrodes and a solid electrolyte, instead of the liquid orpolymer gel electrolytes found in lithium-ion or lithium polymer batteries. Afew issues about the ion transport in oxide ceramics with garnet and perovskitestructures, and oxide-polymer composites are discussed in this talk, including:1. Ionic conduction in Li7La3Zr2O12(LLZO) garnets, and the strategy to enhance the ionic conductivity by properdoping; 2. The surface property of LLZO garnets. Without any surfacemodification, Li2CO3-free LLZO shows an intrinsic“lithiophilicity” characteristic, which leads to acontinuous and tight Li/LLZO interface, resulting in an ultra-low interfacialresistance of 49 Ω cm2 and a homogenous current distribution in thecharge/discharge processes; 3. Physical origin of the low grain boundaryconductivity of Li3xLa0.67-x□0.33-2xTiO3.The origin of the low grain boundary conductivity should be understood as aprerequisite to improve the overall conductivity; 4. Ionic conduction inoxide-polymer composites. We use the LLZO-PEO composite as amodel system and develop a conduction model based on the two-phase mixturetheory.

報告人簡介：

郭新，華中科技大學材料學院二級教授，中國固態離子學會理事，國際期刊“Solid State Ionics”編委，國際固態離子學會（InternationalSociety for Solid State Ionics）學術獎評審委員?；貒叭蔚聡诶Ｑ芯恐行模≧esearchCenter Juelich）終身高級研究員，之前，他曾在德國馬普固體研究所（Max PlanckInstitute for Solid State Research）從事研究工作多年。2005年獲美國陶瓷協會Ross Coffin Purdy Award。在主流國際學術會議（如MRS, E-MRS, ECS, MS&T等）及國際著名高校和研究機構（如麻省理工學院、斯坦福大學、瑞士聯邦工學院、德國馬普研究所等）作過數十場邀請報告，在包括“Science”的學術期刊發表論文百余篇。2012年全職回國后創建了“固態離子學實驗室”，其研究領域可概括為“固態離子導體與混合導體及其在信息、能源與環境等領域的應用”。具體研究領域有: 1.固體電解質與固態電池，2.類腦器件與腦啟發式人工智能，3.氣敏傳感器及人工嗅覺，4.功能器件的3D打印。