title: Lithium-ion transport through a tailored disordered phase on the LiNi0.5 Mn1.5 O4 surface for high-power cathode materials.
abstract: The phase control of spinel LiNi0.5 Mn1.5 O4 was achieved through surface treatment that led to an enhancement of its electrochemical properties. Li(+) diffusion inside spinel LiNi0.5 Mn1.5 O4 could be promoted by modifying the surface structure of LiNi0.5 Mn1.5 O4 through phosphidation into a disordered phase (Fd3m) that allows facile Li(+) transport. Phosphidated LiNi0.5 Mn1.5 O4 showed a significantly enhanced electrochemical performance, even at high rates exceeding 10 C, demonstrating that the improved kinetics (related to the amount of Mn(3+) ) can render LiNi0.5 Mn1.5 O4 competitive as a high-power cathode material for electric vehicles and hybrid electric vehicles.
authors.affiliation: Department of Energy & Materials Engineering, Dongguk University, 100-715 Seoul (Korea).
authors.forename: Mi Ru
authors.initials: MR
authors.lastname: Jo
authors.forename: Yong-Il
authors.initials: YI
authors.lastname: Kim
authors.forename: Yunok
authors.initials: Y
authors.lastname: Kim
authors.forename: Ji Su
authors.initials: JS
authors.lastname: Chae
authors.forename: Kwang Chul
authors.initials: KC
authors.lastname: Roh
authors.forename: Won-Sub
authors.initials: WS
authors.lastname: Yoon
authors.forename: Yong-Mook
authors.initials: YM
authors.lastname: Kang
mesh_terms: D004058:Diffusion; D011211:Electric Power Supplies; D004566:Electrodes; D008094:Lithium / Q000737:chemistry*; D018020:Lithium Compounds / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D018020:Lithium Compounds; D010087:Oxides; D008345:Manganese; D009532:Nickel; D008094:Lithium
keywords: batteries; cathodes; lithium; spinels; surface analysis