| SHS합성법에 의한 리튬이온이차전지용 정극활물질 LiMn2O4 의 제조 |
| 장창현, Hayk Nersisyan, 김정한1, 원창환 |
충남대학교 금속공학과
1한국과학기술원 신소재공학과 |
| Synthesis of LiMn2O4 Powders Using Li-Ion Secondary Battery by SHS Process |
| Chang-Hyun Jang, Hayk Nersisyan, Jung-Han Kim1, Chang-Whan Won |
Department of Metallurgical Engineering, Chungnam National University
1Department of Materials Science and Engineering, KAIST |
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| ABSTRACT |
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A simple and effective method for the synthesis of LiMn$_{2}$O$_{4}$ powder as a cathode material for lithium secondary battery is reported. Micrometer size LiMn$_{2}$O$_{4}$ was prepared by combustion synthesis technique employing initial mixture of l.l LiNO$_{3}$ -1.3Mn-0.7MnO$_{2}$-1NaCl composition. Parametric study of the combustion process including molar ratio of Mn/MnO$_{2}$ and NaCl concentration were carried out under air atmosphere. The combustion products obtained were additionally heat treated at the temperature 900$^{circ}C$ and the washed by distilled water. The results of charging-discharging characteristics revealed that LiMn$_{2}$O$_{4}$ cell synthesized in the presence of NaCl had a high capacity and much better reversibility than one formed without NaCl An approximate chemical mechanism for LiMn$_{2}$O$_{4}$ formation is proposed. |
| Key words:
LiMn2O4, SHS process, Charging-discharging |
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