Fluorine-doped LiNi{sub 0.5}Mn{sub 1.5}O{sub 4} for 5 V cathode materials of lithium-ion battery

Journal Article · Mon Dec 01 04:00:00 EST 2008 · Materials Research Bulletin

OSTI ID:21195045

Guodong, Du; NuLi, Yanna ^[1]; Jiulin, Wang ^[1]

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1. Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (China)

Fluorine-doped 5 V cathode materials LiNi{sub 0.5}Mn{sub 1.5}O{sub 4-x}F{sub x} (0.05 {<=} x {<=} 0.2) have been prepared by sol-gel and post-annealing treatment method. The results from X-ray diffraction and scanning electron microscopy (SEM) indicate that the spinel structure changes little after fluorine doping, but the particle size varies with fluorine doping and the preparation conditions. The electrochemical measurements show that stable cycling performance can be obtained when the fluorine amount x is higher than 0.1, but the specific capacity is decreased and 4 V plateau capacity resulting from a conversion of Mn{sup 4+}/Mn{sup 3+} remains. Moreover, influence of the particle size on the reversible capacity of the electrode, especially on the kinetic property, has been examined.

• OSTI ID: 21195045
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 12 Vol. 43; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CATHODES
DOPED MATERIALS
ELECTRIC BATTERIES
ELECTROCHEMISTRY
ENERGY STORAGE
FLUORINE
LITHIUM COMPOUNDS
LITHIUM IONS
MANGANESE COMPOUNDS
MANGANESE IONS
OXIDES
PARTICLE SIZE
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
X-RAY DIFFRACTION