25-27 November 2015
National Centre for Synchrotron Science
Australia/Melbourne timezone

Effects of Ag-Embedment on electronic and ionic conductivities of LiMnPO4 and performances as a cathode for lithium-ion batteries

25 Nov 2015, 14:30
Oliphant Auditorium ()

Oliphant Auditorium

Oral Energy Materials Energy Materials I


Dr Docheon Ahn (Pohang Accelerator Laboratory)


Ag-embedded LiMnPO4 (LMP) cathode was synthesized by solid-state reaction using 1 wt% Ag precursor. Structure, morphology, and electrical conductivity studies of Ag-embedded LMP were performed by high resolution synchrotron powder X-ray diffraction, high resolution transmission electron microscopy, energy dispersive X-ray spectroscopy, and four probe measurements. An Ag nanoparticle (~ 26 nm) surrounded by several olivine crystallites within a single particle dramatically improved overall electrical conductivity of LMP by four orders of magnitude relative to that of pristine LMP, playing roles as conducting bridges among LMP crystallites as well as particles. Rietveld analysis confirmed structural variations related to modification of atomic bond lengths of Mn-O, P-O, and Li-O coordination due to Ag-embedment and thereby leads to facile Li ion diffusion in LMP. Consequently, although small amount of Ag was included, Ag-embedded LMP cathode exhibited outstanding electrochemical performances (92 mAhg-1 at 10 C) versus lithium.
Keywords synchrotron powder X-ray diffraction; Rietveld analysis; cathode materials

Primary author

Dr Docheon Ahn (Pohang Accelerator Laboratory)

Presentation Materials

There are no materials yet.
Your browser is out of date!

Update your browser to view this website correctly. Update my browser now