1. Title : Structures and Properties of phosphate LiFePO4/C and silicate

            Li2FeSiO4/C composites

2. Speaker : Dr.Youxiang Zhang(Wuhan University)

3. Date & Time : Jul 6th, AM11:00~




 

4. Venue : Bldg.301, Rm.1512-2

5. Abstract :

Structures and Properties of phosphate LiFePO₄/C and silicate Li₂FeSiO₄/C composites will be


giving demonstration as the alternative cathodes for rechargeable lithium ion batteries. Both the

phosphate and silicate composites can be synthesized as nanostructured and/or micro-nano



hierarchically structured materials with thin carbon layer coating at the surfaces. The



nanostructured composites show excellent high-rate performance and long-term cyclability, while

the micro-nano hierarchically structured composites show both superior high-rate capability and

high tap density as cathodes for rechargeable Li-ion batteries. For monoclinic Li₂FeSiO₄/C, the



capabilities at low current density are believed to be related to both Fe²⁺/Fe³⁺ and Fe³⁺/Fe⁴⁺



redox couples, as suggested by the Mössbauer spectra for the electrode materials. All these



results suggest that specially structured phosphate and silicate composites are very promising



candidates as cheap and sustainable cathode materials for the next generation of rechargeable



lithium ion batteries.