【材華講壇】預告:Ion Transport in Lithium-Ion Conducting Solid Electrolytes: Oxides and Composites

作者:時間:2019-11-06瀏覽:265供圖:審閱:來源:南京航空航天大學

字體:

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,第四批國家特聘專家,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。回國前任德國于利希研究中心(ResearchCenter 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。

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