Webinar on ‘Correlative Imaging of Battery Heterogeneities: ionic transport, electronic structure and chemistry’.
Presenter: Jigang Zhou PhD, Industrial Senior Scientist, Canadian Light Source Inc., Canada
Date and time: 15th of June 2020, 4:00 PM – 5:00 PM CEST
Abstract: Deeper understanding of the heterogeneities, an intrinsic characteristic in batteries, including ionic transport, and chemical and electronic structures at interface and bulk of active materials and its dependence on other components in a battery is crucial for developing better performance batteries, especially for electric transportation purposes. Element specific X-ray absorption near-edge structures (XANES) spectroscopy, explores detailed information on the local chemistry and electronic states of the absorbing atom which makes it an excellent tool to understand chemical bonding, electronic structure, and surface and bulk chemistry difference in batteries. XANES with nano-focused X-ray beam (STXM) and surface sensitive field-imaging X-PEEM can collect chemical imaging of high chemical sensitivity with good spatial resolutions. In this talk I will show nanoscale chemical imaging studies of battery materials by STXM and X-PEEM at CLS. The emphasis is imaging inhomogeneity under “normal” or abusive conditions in a commercial like electrode with preserved interface structure. The studies show that the battery heterogeneity is an interplay of local environment, morphology and facet orientation of electrode active materials. Such novel characterization tools shall lead new insights on battery engineering toward a better battery with high performance, long service life and high safety.
Biography: Jigang Zhou, staff scientist at Canadian Light Source and adjunct professor at Western University and Harbin Institute of Technology (China), received his B.Sc. and M.Sc.in Battery Engineering from Harbin Institute of Technology (HIT) in China and Ph.D. in Chemistry from Western University, Canada. He has ten years’ experience on battery R&D and ten years’ experience on energy materials characterization by synchrotron. His research focus on developments of clean energy including Li-ion batteries and fuel cells through new insights of structure-property relationship and mechanism on reactions and degradations especially by using soft X-ray spectroscopy and spectromicroscopy. Dr. Zhou is an author and co-author of over 100 refereed-journals, with total citation of close to 15,000 and H-index of 46 (2019 Web of Science high cited author). Dr. Zhou has delivered over 20 invited talks in international conferences such as CIBF at Shenzhen, International Battery Seminar and Exhibition at Fort Lauderdale and academic research institutes including MIT, McGill, BNL, and EMPA (Switzerland)
You can see the presentation of the webinar here: https://drive.google.com/file/d/1CH12Q2_Q2cHFiE9CL_z2JrvnYyW5H72u/view?usp=sharing