The Electrochemical Characterization of $LiMn_{2-y}M_{y}O_4$ Cathode Material - I. Crystal Structure and AC Impedance Properties of $LiMn_{2-y}Mg_{y}O_4$

$LiMn_{2-y}M_{y}O_4$ 정극 활물질의 전기화학적 특성 - I. $LiMn_{2-y}Mg_{y}O_4$의 결정 구조 및 AC Impedance 특성

  • 정인성 (전남대학교 전기공학과) ;
  • 김종욱 (전북대학교 전자정보 사업단) ;
  • 구할본 (전남대학교 전기공학과) ;
  • 김형곤 (조선이공대학 전기과) ;
  • 손명모 (대구공업대학 세라믹공업과)
  • Published : 2001.04.01


Crystallized $LiMn_{2-y}Mg_{y}O_4$ powder was prepared by calcing the mixture of LiOH.$H_2O$, $MnO_2$ and MgO at $800^{\circ}C$ for 36h in an air atmosphere. The structure of $LiMn_{2-y}Mg_{y}O_4$ crystallites was analyzed from powder X-ray diffraction data as a cubic spinel, space group Fd3m. Though all cathode material showed spinel phase based on cubic phase in X-ray diffraction, other peaks gradually exhibited and became intense with increasing y value in $LiMn_{2-y}Mg_{y}O_4$. However, ununiform which calculated by (111) face and (222) face was constant in spite of the increase of y value, except pure $LiMn_2O_4$. AC impedance of Li/$LiMn_{2-y}Mg_{y}O_4$ cells revealed the similar resistance of about $70\Omega$ before cycling. In addition, The impedance of Li/$LiMn_{1.9}Mg_{0.1}O_4$ cell changed during charge and discharge or after cycling.


  1. Electrochimica Acta v.45 Electrochemical Properties of Carbon Composite Electrode with Polymer Electrolyte for Electric Double-Layer Capacitor H. B. Gu;J. U. Kim;H. W. Song;G. C. Park;B. K. Park
  2. J. Electrochem. Soc. v.140 no.10 Effects of Impurities on the Electrochemical Preperties of LiCoO₂ J. N. Reimers;J. R. Dahn;U. von Sacken
  3. J. Electrochem. Soc. v.138 no.8 Rechargeable LiNiO₂/Carbon Cells J. R. Dahn;U. von Sacken;M. W. Juzkow;H. Al-Janaby
  4. Chemistry Express v.5 no.10 Preliminary Results on Synthesis and Characterization of $LiCo_{1-x}Ni_xO_2$ (0=
  5. 전기전자재료학회논문지 v.13 no.4 리튬 폴리머전지용 PVDF/PAN계 고분자 전해질의 이온 전도 특성 이재안;김종욱;구할본
  6. J. Electrochem. Soc. v.144 no.10 $M^{3+}$-Modified LiMn₂O₄ Spinel Intercalation Cathodes A. D. Roberson;S. H. Lu;W. F. Averill;W. F. Howard, Jr.
  7. J. Electrochem. Soc. v.142 no.8 Some Aspects of LiMn₂O₄Electrochemistry in the 4Volt Rang G. Pistoia;D. Zane;Y. Zhang
  8. Solid State Ionics v.111 Single Phase Region of Cation Substituted Spinel $LiM_yMn_{2-y}O_{4-{\delta}}$ (M-Cr, Co and Ni) and Cathode Property for Lithium Secondary Battery M. Hosoya;H. Ikuta;M. Wakihara
  9. J. Electrochem. Soc. v.146 no.4 Cathode of $LiMg_yMn_{2-y}O_4$ and $LiM_yMn_{2-y}O_{4-{\delta}}$ spinel Phases for Lithium Secondary Batteries N. Hayashi;H. Ikuta;M. Wakihara
  10. J. Power sources v.90 Capacity Fading of LiMn₂O₄electrde Synthesized by the emulsion drying methode S. T. Myung;H. T. Chung;S. Komaba;N. Kumagai;H. B. Gu
  11. 전기전자재료학회논문지 v.12 no.3 용매로써 물을 사용한 Sol-Gel법에 의해 제조된 LiMn₂O₄정극 활물질의 전기화학적 특성 정인성;구할본
  12. 전기전자재료학회논문지 v.12 no.4 열처리조건데 따른 LiMn₂O₄정극 활물질의 결정 구조와 전기화학적 특성의 변화 정인성;송희웅;이진;박계춘;박복기;구할본