报告人：Seth S. Berbano

时间: 2019年4月4日 上午10:00-11:30

地点: 仲英楼材料学院第一会议室

简介：Seth Berbano博士是村田电子北美分部研究员（Murata Electronics North America, Inc），美国介电、压电研究中心企业顾问代表（NSF I/UCRC Center for Dielectric & Piezoelectrics）。2011年在美国爱荷华州立大学取得材料学学士学位，2016年在美国宾夕法尼亚州立大学取得材料学博士学位，导师为Clive Randall教授和Michael Lanagan教授。曾于2009年、2010年和2015年分别在日本大阪府立大学Masahiro Tatsumisago教授课题组、韩国庆尚大学Hyo-Jun Ahn教授课题组和日本太阳诱研究中心交流合作。Berbano博士主要研究方向是固态锂离子电池、低温烧结、电子功能陶瓷等，曾在Adv. Funct. Mater.、J. Am. Chem. Soc.等期刊上发表高水平论文，担任Chem. Mater.，J. Am. Chem. Soc.等国际期刊审稿人。曾获得Alfred R. Cooper Scholars Award、George Washington Carver Scholarship等荣誉和奖励。

摘要：In this talk, I’ll discuss the cold sintering process and focus on its application to solid electrolytes. Solid electrolytes are enabling materials for solid-state batteries. Solid electrolytes are of interest for safer and more reliable replacements to liquid electrolytes at a wide range of operating temperatures. Using cold sintering, the solid electrolyte Li1+xAlxGe2-x(PO4)3 (x = 0.50) was densified to around 80 % theoretical density in minutes at 120 oC and 400 MPa. In order to bridge ionically resistive grain boundaries, a 5 minute post-processing at 650 oC was required. High volume fractions of ceramic electrolyte could be co-sintered with polymer. Up to 95 vol. % Li1.5Al0.5Ge1.5(PO4)3 + 5 vol. % Poly(vinylidene fluoride hexafluoropropylene) composite electrolytes were cold sintered at 120 oC to densities exceeding 85 %. After soaking in 1 M LiPF6 ethylene carbonate-dimethyl carbonate (50 EC:50 DMC vol. %), composite electrolyte ionic conductivities at 25 oC reached 10-4 S/cm. Using cold sintering, processing and integration of solid electrolytes and other important technical ceramics may now be possible at polymer processing temperatures.