报告题目：Electrolyte Dictated Materials Design for Beyond Lithium Ion Batteries

报告人：Prof. Yan Yao（美国University of Houston）

报告时间：2018年7月14日（周六）上午10:30-12:00

报告地点：华南理工大学大学城校区B5-102会议室

欢迎广大师生参加！

报告人简介：

    姚彦现为美国休斯顿大学电子工程系和德州超导中心副教授。他于2008年博士毕业于加州大学洛杉矶分校，在Polyera公司作为高级科学家和斯坦福大学从事博士后研究。他的研究领域集中在安全和低成本的新型能源存储材料和电池设计，包括新型锂离子电池，镁离子电池，水系锂离子电池，全固态电池等。他在Nature Materials、 Nature Communications、JACS、Nano Letters 等期刊发表论文70多篇和国际专利16个，论文引用超过17000次。多年来受邀在各种国际性学术会议做报告70多次。他获得美国海军实验室的青年研究员奖，Robert A. Welch 讲座教授, 优秀教学奖和Scialog Fellow。

报告的摘要：

Lithium ion batteries have reshaped our life with their omnipresence in portable electronics. In lithium ion batteries, lithium ions are shuttled in a nonaqueous solvent between a graphite electrode and a transition metal oxide electrode through intercalation redox reactions. Over the past two decades, lithium ion batteries have steadily improved in terms of cost and lifetime. However, increasing the specific energy of these batteries is reaching its limit and high-profile fire accidents (e.g. cell phones spontaneously combusting) cast doubt of their applications in electric vehicles and large-scale energy storage. Emerging “beyond lithium ion” batteries with alternative battery chemistries may potentially offer new technologies with cost-effective materials, safe operation, and a long-life battery performance. With that being said, each beyond lithium ion battery chemistry has its own distinct fundamental challenges, and sometimes, these challenges are not very well understood. Most often, the battery’s electrolyte plays an important role in the materials design. In this talk, I will describe the distinct challenges in three beyond lithium ion batteries: aqueous, Mg ion, all solid-state batteries, and the corresponding examples of electrolyte-dictated materials design. Understanding their respective problems in combination with the ability to design new materials to tackle these challenges could enable unprecedented device performance towards cheaper, safer, and energy-dense batteries.