求是力学讲座 系列八

报告摘要： 

In the first part of my talk, I will review our progress in using transmission electron micrsocopy �C scanning probe microscopy (TEM-SPM) platform to probe the electrical and mechanical properties of individual carbon nanotubes and nanowires. Individual multiwall carbon nanotubes are peeled off layer-by-layer by electric breakdown inside the TEM. This provided new insights into the transport property of nanotubes. Plastic deformation, such as superplasticity, kink motion, dislocation climb, and vacancy migration, was discovered in nanotubes. In the second part of my talk, I’ll review our progress in in-situ studies of lithium ion batteries (LIBs). We created the first nanobattery inside a TEM, allowing for real time atomic scale observations of battery charging and discharging processes. Two types of nano battery cells, one ionic liquid based, and the other all solid based, were created. The former consists of a single nanowire anode, an ionic liquid (IL) electrolyte and a bulk LiCoO2 cathode; the latter uses Li2O as a solid electrolyte and metal Li as anode. The electrochemical process induced volume changes, phase transformations, and mechanical stress were revealed in real time and at an atomic scale. The results provide understanding of the fundamental science of LIBs, guiding the development of advanced LIBs for plug-in electric vehicle applications.

报告人简介：

燕山大学教授，博士生导师。1996 年博士毕业于中科院金属研究所；1996年至1999 年间，于日本国家无机材料研究所、日本大阪大学先后任职；1999 年至2001 年间，于美国洛斯阿拉莫斯国家实验室做博士后；2002 年至2012 年间，于美国波斯顿学院、美国桑迪亚国家实验室纳米科技综合中心先后做研究员，2016 年至今，于燕山大学亚稳态制备技术与科学国家重点实验室做教授。一直以来以电子显微镜为主要研究手段，从事纳米科学与能源科学研究工作20 多年，主持或者共同主持美国能源部和自然科学基金等项目12 项，主持经费合计约450 万美元。在电池研究领域取得了系列原创性的研究成果，建立了多种纳米科学和能源材料透射电镜-探针显微镜（TEM-SPM）的原位定量测量技术，在国际上率先制造出可在高真空度电镜中工作的锂电池，发明了在原子尺度上实时观察锂离子电池充放电过程的新技术，形成了原位纳米尺度电化学研究的新领域，为锂离子电池研究提供了有效的技术手段，得到了学术界的广泛认同和高度评价。研究成果在《Nature》、《Science》、《Physical Review Letters》、《Nature Nanotechnology》、《Nature Communications》、《Nature Methods》、《PNAS》、《Nano Letters》等杂志上发表，共发表论文204 篇，h 因子为69，总引用次数超过16000 次，在各种专业学术会议上发表特邀报告80 多次。