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http://dx.doi.org/10.4313/TEEM.2006.7.2.076

Electrochemical Characteristics of LiMnO2 for Lithium Secondary Battery  

Jin Bo (College of Materials Science and Engineering, Jilin University, Department of Electrical Engineering, Chonnam National University)
Jun Dae-Kyoo (Department of Electrical Engineering, Chonnam National University)
Gu Hal-Bon (Department of Electrical Engineering, Chonnam National University)
Publication Information
Transactions on Electrical and Electronic Materials / v.7, no.2, 2006 , pp. 76-80 More about this Journal
Abstract
Well-defined orthorhombic $LiMnO_2\;and\;LiCo_{0.1}Mn_{0.9}O_2$ were synthesized by a solid-state reaction and quenching process. X-ray diffraction (XRD) results revealed that the as-synthesized powders showed an orthorhombic phase of a space group with Pmnm. The $Li/LiMnO_2\;and\;Li/LiCo_{0.1}Mn_{0.9}O_2$ cells were constituted and cycled galvanostatically in the voltage range of 2.0-4.3 V vs. $Li/Li^+$ at a current density of $0.5\;mA\;cm^{-2}$ at room temperature and $50^{\circ}C$, respectively. The results demonstrated that the highest specific capacity of $Li/LiMnO_2$ cells at room temperature and $50^{\circ}C$ was 95 and $155\;mAh\;g^{-1}$, respectively. As for $Li/LiCo_{0.1}Mn_{0.9}O_2$ cells, the highest specific capacity at room temperature and $50^{\circ}C$ was 160 and $250\;mAh\;g^{-l}$, respectively. It could be seen that the performance of $Li/LiCo_{0.1}Mn_{0.9}O_2$ cells was better than that of $Li/LiMnO_2$ cells.
Keywords
Orthorhombic; $LiMnO_2$; Quenching; Cathode material;
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