报告题目：Materials for Batteries: what can we learn from soft X-ray spectroscopy?
报告人：  杨万里 研究员 (美国伯克利国家实验室)
时间：    4月24日(周四) 上午9:00
地点：    卢嘉锡楼报告厅（202）

    欢迎感兴趣的老师与学生参加。

以下是报告的摘要部分：
 
 
  Improving the energy-density and safety of batteries remains a formidable challenge for sustainable energy applications, especially electric vehicles. The optimism is often based on modern material synthesis and advanced characterization tools. Synchrotron based soft x-ray spectroscopy is one of such incisive tools that probe the electronic states in the vicinity of the Fermi Level, which are directly related to battery operations.

  This presentation will focus on a tutorial type of discussion. The main purpose is to explain and showcase what kind of valuable information could be obtained through soft x-ray absorption and emission spectroscopy for battery researches (10.1016/j.elspec.2013.03.008). The talk will start with general introductions of synchrotron facilities and soft x-ray spectroscopic tools. Both the strong and weak aspects of soft x-ray will be discussed. We will then discuss some recent spectroscopic results on how soft x-ray spectroscopy differentiates the chemical products in SEIs (10.1002/admi.201300115), measures electronic states that defines the electric property of battery binder (10.1002/adma.201102421), detects the transition-metal-3d (10.1021/ja303225e) and anion-2p state evolution at different electrochemical stages, and reveals the charge dynamics in operating battery electrodes through in-situ spectroscopy (doi:10.1038/ncomms3568).

  This talk will NOT get into the technical details of the experiments and researches, but concepts related to possible scientific correlations will be explained.