Electrochemical properties and synthesis of LiAl{sub 0.05}Mn{sub 1.95}O{sub 3.95}F{sub 0.05} by a solution-based gel method for lithium secondary battery

Journal Article · Tue Mar 15 04:00:00 EST 2005 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2005.01.015· OSTI ID:20725850

Benlin, He ^[1]; Shujuan, Bao ^[1]; Yanyu, Liang ^[1]; Wenjia, Zhou ^[1]; Hua, Li ^[1]; Hulin, Li ^[1]

---

1. College of Chemistry and Chemical Engineering of Lanzhou University, Lanzhou 730000 (China)

The cathode materials, LiMn{sub 2}O{sub 4}, LiAl{sub 0.05}Mn{sub 1.95}O{sub 4} and LiAl{sub 0.05}Mn{sub 1.95}O{sub 3.95}F{sub 0.05} were firstly prepared by a simple solution-based gel method using the mixture of acetate and ethanol as the chelating agent. The synthesized samples were investigated by X-ray diffraction, scanning electronic microscope and differential and thermal analysis. The as-prepared powders were used as positive materials for lithium-ion battery, whose discharge capacity and cycle voltammogram properties were examined. The results revealed that LiAl{sub 0.05}Mn{sub 1.95}O{sub 3.95}F{sub 0.05} synthesized by the solution-based gel method had higher initial capacity than LiAl{sub 0.05}Mn{sub 1.95}O{sub 4} and better capacity retention rate (92%) than that of LiAl{sub 0.05}Mn{sub 1.95}O{sub 4} and LiMn{sub 2}O{sub 4}, which revealed that Al and F dual-doped LiMn{sub 2}O{sub 4} could gain better electrochemical properties of LiMn{sub 2}O{sub 4} than only the Al-doped LiMn{sub 2}O{sub 4}.

• OSTI ID: 20725850
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 3 Vol. 178; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACETATES
ALUMINIUM COMPOUNDS
CHELATING AGENTS
DOPED MATERIALS
ELECTRIC BATTERIES
ETHANOL
FLUORIDES
GELS
LITHIUM COMPOUNDS
LITHIUM IONS
MANGANESE COMPOUNDS
OXIDES
SPINELS
SYNTHESIS
THERMAL ANALYSIS
X-RAY DIFFRACTION