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
- 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, Vol. 178, Issue 3; Other Information: DOI: 10.1016/j.jssc.2005.01.015; PII: S0022-4596(05)00028-9; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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