title: Synthesis and electrochemical studies of nano-scale carbon-coated LiFePO4 electrodes for Li-ion batteries.
abstract: Regardless of high capacity and stability during lithium extraction, LiFePO4 materials have difficulty in the applications for high electrical density because of low electrical conductivities. In order to optimize this problem, we synthesized carbon coated LiFePO4 by adding humic acid using solid state reaction method. We characterized the synthesized compounds via the crystallinity, the valence states of Fe ions, and their shapes. We found the carbon coating using X-ray photoelectron spectroscopy (XPS) and transmission electron microscope (TEM). We also found that the iron ion is substituted from 3+ to 2+ through XPS measurement. We showed that the carbon coating increased the electrochemical behavior by measuring the charge-discharge characteristics.
authors.affiliation: High-Technology Components and Materials Research Center, Korea Basic Science Institute, Pusan 618-230, Korea.
authors.forename: Euh Duck
authors.initials: ED
authors.lastname: Jeong
authors.forename: Hye Jin
authors.initials: HJ
authors.lastname: Kim
authors.forename: Chang Won
authors.initials: CW
authors.lastname: Ahn
authors.forename: Myoung Gyu
authors.initials: MG
authors.lastname: Ha
authors.forename: Tae Eun
authors.initials: TE
authors.lastname: Hong
authors.forename: Hyun Gyu
authors.initials: HG
authors.lastname: Kim
authors.forename: Jong Sung
authors.initials: JS
authors.lastname: Jin
authors.forename: Jong Sung
authors.initials: JS
authors.lastname: Bae
authors.forename: K S
authors.initials: KS
authors.lastname: Hong
authors.forename: Yang-Soo
authors.initials: YS
authors.lastname: Kim
authors.forename: Hae-Jin
authors.initials: HJ
authors.lastname: Kim
authors.forename: C H
authors.initials: CH
authors.lastname: Doh
authors.forename: H S
authors.initials: HS
authors.lastname: Yang