报告题目：先进电化学体系的界面工程设计

报告人：美国马里兰大学 范修林 博士

报告时间：2018年12月19日（周三）下午14:30

报告地点：子良A220会议室

邀请人：新能源材料与技术研究所 张俊 校聘教授

报告内容简述：

In this presentation, I will focus on designing novel non-aqueous electrolytes and related fluorinated interphases for highly reversible and high-energy Li battery systems. The electrolyte is the culprit for poor battery performance under aggressive electrochemistries in lithium based battery and innovation is in absolute demand to keep up with the advancement of cathode materials and application of high capacity anode (such as lithium metal and silicon). The modern Li-ion batteries are exclusively based on ethylene carbonate (EC) electrolytes, which stabilize the graphite anode via formation of an SEI without impeding (de)lithiation. However, these EC-based electrolytes do not have sufficient anodic stability to sustain the aggressive cathode materials for the next generation battery chemistries, such as 4.4 V LiNi0.8Mn0.1Co0.1O2 (NMC 811) and > 5.0 V high voltage cathodes. Besides, these EC-based electrolytes are not stable against the Li metal anode due to the intrinsic reactivity of carbonyl functionality (C=O), confining the columbic efficiency of Li plating/striping to a constantly low level (< 90%). The inefficient plating and stripping also accompanies the detrimental Li dendrite formation. Detailed effects of optimizing electrolytes and the fluorinated interphases will be described.

报告人简介：

范修林博士，2012年6月浙江大学材料科学与工程系博士毕业。2014年2月开始在美国马里兰大学化学工程与分子生物学工程系从事博士后研究，2017年4月晋升为助理研究科学家（Assistant Research Scientist）。目前主要从事二次电池等能源存储器件的界面工程及相关电解液的设计研究，共计发表SCI论文100余篇。其中一作（包括共同一作）或通讯作者论文发表在Nature Nano.，Chem，Joule，Nature Commun.，Science Adv.，Angew. Chem. Int. Ed.，Nano Letters，ACS Nano，Energy Environ. Sci.，Adv. Energy Mater.，Adv. Funct. Mater.，Nano Energy，Energy Storage Mater.，ACS Central Science等国际顶级/知名期刊。