한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제42권7호
  • /
  • Pages.503-508
  • /
  • 2005
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  • 1229-7801(pISSN)
  • /
  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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SHS합성법에 의한 리튬이온이차전지용 정극활물질 LiMn2O4 의 제조

Synthesis of LiMn2O4 Powders Using Li-Ion Secondary Battery by SHS Process

  • 장창현 (충남대학교 금속공학과) ;
  • ;
  • 김정한 (한국과학기술원 신소재공학과) ;
  • 원창환 (충남대학교 금속공학과)
  • Jang, Chang-Hyun (Department of Metallurgical Engineering, Chungnam National University) ;
  • Nersisyan, Hayk (Department of Metallurgical Engineering, Chungnam National University) ;
  • Kim, Jung-Han (Department of Materials Science and Engineering, KAIST) ;
  • Won, Chang-Whan (Department of Metallurgical Engineering, Chungnam National University)
  • 발행 : 2005.07.01
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초록

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.

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