Synchrotron Radiation Analysis of Lithium Ion Batteries and Development of a New Lithium-Peroxide Battery

Prof. Masaharu Oshima

Synchrotron Radiation Research Organization, University of Tokyo, JAPAN

地点: 物理楼南楼506室

时间： 2015年4月22日 (星期三)下午13:30-15:00

We focus on revealing experimentally the change of the electronic structure, especially in the Fe 3d states through Li intercalation / deintercalation for LiFePO4, pyrophosphate iron compound Li2FeP2O7, Li2Fe1-xMnxP2O7 with Mn substitution, and Na pyrophosphate iron compound Na2FeP2O7. For nano and operando analysis of cathode materials, we performed pin-point photoelectron spectroscopy and soft X-ray emission spectroscopy (XES) of LiMn2O4, respectively. Based on these electronic structure analysis, we tried to develop a lithium-peroxide battery with Co-doped Li2O cathode for higher specific energy density, where O and Co X-ray absorption spectroscopy was used to reveal electronic states.

2006 –, Director, The University of Tokyo Synchrotron Radiation Research Organization

Publications: about 570 original papers

1. "Selective probing of the OH and OD stretch vibration in liquid water using resonant inelastic soft X-ray scattering" Phys. Rev. Lett. 111, 193001 (2013).

2. "Spin-filter tunnel junction with matched Fermi surfaces” Phys. Rev. Lett. 109, 076602 (2012).

3. "Metallic quantum well states in artificial structures of strongly correlated oxide" Science 333, 319-322 (2011).

4. "Origin of metallic states at the heterointerface between the band insulators LaAlO3 and SrTiO3" Phys. Rev. Lett. 101, 026802 (2008).

5. "In-situ photoemission study of Pr0.7Ca0.3MnO3 epitaxial thin films with suppressed charge fluctuations" Phys. Rev. Lett. 100, 026402 (2008).

6. "Nature of well-screened state in hard x-ray Mn 2p core level photoemission of La1-xSrxMnO3 films", Phys. Rev. Lett. 93, 236401 (2004).

联 系 人 肖立新 (62767290)