杨万里访问E01小组 Soft X-ray RIXS for Batteries: Demonstrations and Perspectives

Time : 
Mon, 07/04/2016 - 10:30
Location : 
M 楼 253会议室

 

报告人简介

杨万里Advanced Light Source,Lawrence Berkeley National Laboratory
RESEARCH EXPERIENCES
9/2006 – Physicist Staff Scientist, Advanced Light Source, Lawrence Berkeley National Laboratory
9/2004 – 9/2006, Staff Scientist, Geballe Laboratory for Advanced Materials, Stanford University
EDUCATION
Postdoc.    Department of Physics and Applied Physics, Stanford University  (2000-2004)
Ph.D.    Institute of Physics, Chinese Academy of Sciences, Beijing, China (1995-2000)  
B.S.     Department of Physics, Shandong University, Shandong, China (1991-1995)

报告内容
       An energy storage device is a complex system involving the physical and chemical properties of both the active and inactive components on the surface and in the bulk. The operation mechanism of an electrochemical energy storage system, a battery, remains largely elusive. To clarify such mechanism requires multimodal approaches based on modern characterization tools, such as soft x-ray spectroscopy techniques including soft x-ray absorption (sXAS), emission spectroscopy (XES), and resonant inelastic scattering (RIXS).
 At this time, sXAS has been employed for battery researches to some extend, and has demonstrated its power for revealing various properties in the relevant electron states, the quantitative cation redox, the chemical reactions and species at the interface, etc..  However, the XES and RIXS, although as popular techniques for fundamental physics in the last two decades, have yet to be capitalized for battery studies, mostly due to their low detection efficiency and complicated instrumentation for in-situ studies.
   This presentation covers the various core-level soft x-ray spectroscopic techniques and our recent developments of both sXAS methodology and RIXS instrumentation for studying battery systems. The discussions focus on the recently commissioned in-situ RIXS (iRIXS) system at the ALS, which enables various studies of battery systems in different aspects. Perspectives of in-situ RIXS will also be discussed for studying both the bulk cation/anion properties and the liquid solvation shell.

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