Journal
ELECTROCHIMICA ACTA
Volume 52, Issue 16, Pages 5201-5206Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2007.02.029
Keywords
co-precipitation; spinel; cathode; lithium; battery
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Funding
- National Research Foundation of Korea [과C6A1908] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Metal-doped spinet lithium manganese oxides were successfully synthesized via co-precipitation. The synthesized Li1.05M0.05Mn1.90, (M=Ni, Mg, Al) had highly crystalline cubic spinel phase with the space group Fd3m, as confirmed by X-ray diffraction study. From scanning electron microscopic observation, it was found that the prepared materials had spherical morphology with high tap-density. The Li1.05M0.05Mn1.9O4 (M =Ni, Mg, Al) electrode exhibited improved cycling performance at elevated temperature. Especially, the Li1.05Al0.05Mn1.9O4 showed capacity retention of 91.5% during 100 cycles at elevated temperature (55 degrees C). Also the thermal stability of the Li1.05M0.05Mn1.9O4 (M=Ni, Mg, Al) was also significantly improved. (c) 2007 Elsevier Ltd. All rights reserved.
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