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Investigating structure variation of electrode materials for lithium ion batteries

Event Details

Event Dates: 

Wednesday, October 10, 2012 - 7:30am

Speaker Name(s): 

Hong Li

Speaker Affiliation(s): 

Institute of Physics, Chinese Academy of Sciences
Seminar Type/Subject

Event Details & Abstract: 

Improving energy density, power density, cycle life and safety and decreasing cost of current Li-ion batteries are highly desirable for the applications of advanced portable electronic devices, electrical tools, electrical vehicles, storage batteries for renewable energy, stationary batteries for smart grids. Understanding lithium storage mechanism and structure-property relationship across length scales are essential for rational design of new materials. Here we report our recent efforts on investigating the electrode materials[1-6], including Si anode, LiFePO4 and Li2MnO3 cathodes for Li-ion batteries, using force curve mode of SPM、synchrotron in situ/ex situ XAS and XRD、ABF-STEM、neutron diffraction techniques as well as first principles calculations. Much attention is focused on the variation of lattice and electronic structure of electrode materials during lithiation and delithiation and the multiple layer structure of the solid electrolyte interphase (SEI).