euro-chemistry-2017-posters-accepted-abstracts

13 / 52

Page 95
Notes:
conferenceseries.com
Volume 8, Issue 2 (Suppl) Chem Sci J 2017
ISSN: 2150-3494 CSJ, an open access journal Euro Chemistry 2017
May 11-13, 2017
May 11-13, 2017 Barcelona, Spain
4th European Chemistry Congress
Jiwon Lee et al., Chem Sci J 2017, 8:2(Suppl)
Study of electrochemical performance: Olivine-monoclinic complexes of cathode material for Li-ion
batteries
Jiwon Lee and Youngil Lee
University of Ulsan, Korea
Olivine LiMPO4 (M=Fe, Mn, Co, Ni, etc.) structured cathode materials for lithium ion battery enabling use in individual IT
device, electric vehicles, and high energy storage systems have been investigated due to low cost and structural stability. However,
olivine materials have lower electronic conductivity and discharge capacity compared to other structure of cathode materials. Herein,
we present the preparation and characterization of olivine-monoclinic structured material without using external carbon source to
improve specific discharge capacity with wide operating voltage range (1.0 - 4.5 V) having high electronic conductivity as a cathode
material. X-ray diffraction powder pattern of pristine shows complex of olivine, monoclinic, and vonsenite structures. The disordered
vonsenite structure can be changed to active ordered monoclinic structure after the first cycle. Cycle voltammetry analysis confirms
the activation of both the olivine and the monoclinic after the first cycle.
Biography
Youngil Lee has completed his Ph.D. at the age of 27 years from Louisiana State University and is currently professor of department of chemistry at University of
Ulsan from 2005. He has been studied characterization and synthesis of cathode materials for lithium ion battery and published more than 90 papers in reputed
journals. Especially, he is interesting to study of solid-state NMR spectroscopy on the relationship between the microstructure and electrochemical properties for
energy materials.