5月23日上午，应我院陶新永老师的邀请，美国马里兰大学科利奇帕克分校胡良兵教授、姚永刚博士来我院进行了学术交流，并在子良B4会议室分别作了题为“Garnet Based Solid State Li-Metal Batteries”和“High Temperature Nanomanufacturing for Emerging Applications”的学术报告。

随着锂离子电池逐渐渗透到我们生活中的每一个角落，其安全问题越来越受关注。传统的锂离子电池通常使用的是易燃的液体电解质，存在易燃、易泄露、易腐蚀等安全隐患。胡良兵教授团队通过使用不可燃的石榴石基固态电解质，解决了困扰现有锂电的典型问题：安全、性能和成本。报告中，胡教授讲解了通过原子沉积（ALD）法，在石榴石基固态电解质上包覆一层超薄Al2O3，显著提升了石榴石型固态电解质的润湿性和稳定性，解决了锂/石榴石高面积比电阻的难题。同时，胡教授还介绍了其团队在生物纳米纤维方面的研究成果。其团队通过去除木头的纤维素，填充光折射率匹配的环氧树脂，实现了木头在光学上的透明，并且其强度比原始木头更高，相比玻璃、塑料更加环保。

随后，姚永刚博士介绍了其团队在高温纳米制造方面的最新研究成果。其团队研究发明了世界上首个可直接3D打印的微米级加热炉，其最高温度可达3000 K（约2700℃），升降温速率可达~20000 K/S。此微米加热炉是通过3D打印高浓度氧化石墨烯制成，可以利用3D打印机的三维成型能力，设计不同三维加热炉，以便更细致地进行局部加热，为微纳米科学和工程研究提供了一种极具优势的加热手段。

报告结束后，在座师生纷纷提问，胡良兵教授、姚永刚博士给予了耐心解答，讲坛在师生们的热烈掌声中圆满结束。

胡良兵：

Liangbing Hu  received his B.S. in physics from the University of Science and Technology of China (USTC) in 2002, where he worked with Prof Yuheng Zhang on colossal magnetoresistance (CMR) materials for three years. He did his Ph.D. in at UCLA (with George Gruner), focusing on carbon nanotube based nanoelectronics (2002-2007). In 2006, he joined Unidym Inc  as a co-founding scientist. At Unidym, Liangbing’s role was the development of roll-to-roll printed carbon nanotube transparent electrodes and device integrations into touch screens, LCDs, flexible OLEDs and solar cells. He worked at Stanford University (with Yi Cui) from 2009-2011, where he work on various energy devices based on nanomaterials and nanostructures. Currently, he is an associate professor at University of Maryland College Park. His research interests include nanomaterials and nanostructures, roll-to-roll nanomanufacturing, energy storage focusing on solid-state batteries and Na ion batteries, and printed electronics. He has published over 200 research papers (Total citations: >15,000 times) and given more than 70 invited talks. He received many awards, including: the Nano Letters Young Investigator Lectureship (2017), Office of Naval Research Young Investigator Award (2016), ACS Division of Energy and Fuel Emerging Investigator Award (2016), SME Outstanding Young Manufacturing Engineer Award (2016), University of Maryland Junior Faculty Award (School of Engineering, 2015), 3M Non-tenured Faculty Award (2015), Maryland Outstanding Young Engineer (2014), University of Maryland Invention of Year (2014 Physical Science), Campus Star of the American Society for Engineering Education (2014), Air Force Young Investigator Award (AFOSR YIP, 2013). For more info, please visit  Dr. Hu is the (founding) director of the Center for Advanced Paper and Textile (CAPT) at the University of Maryland College Park. He is also the Co-founder of Inventwood Inc. with efforts to further commercialize the aforementioned cellulose nanotechnologies.

姚永刚：

Yonggang received his B.S. and M.S. in Condensed Matter Physics from Xi’an Jiaotong University, China, in 2010 and 2013. He is currently a PhD candidate in Materials Science and Engineering with Dr. Liangbing Hu at University of Maryland College Park. His research interests include high temperature nanomanufacturing, 3D printing, cellulose and wood based materials, electrocatalysis, and batteries.