The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Synthesis of $LiMn_2O_4$ Cathode Materials by Emulsion Method and Its Electrochemical Properties

  • Youn Kyu Choi (Faculty of New material Engineering, Research Institute of Advanced Materials Developement Chonbuk National University) ;
  • Bok Hee Kim (Faculty of New material Engineering, Research Institute of Advanced Materials Developement Chonbuk National University)
  • Published : 1999.09.01
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Abstract

Synthesis of the spinel $LiMn_2O_4$ by emulsion method was investigated. $LiOH.H_2O \;and \;Mn(NO_3)_2.6H_2O$ were used as starting materials to prepare mixed aqueous solution (0.5 mol/$\ell$ for the $LiMn_2O_4$). Kerosene, paraffin oil and span 80 were used for organic phase. The aqueous solutioin and organic phase were mixed in the ratio of 2:1 and emulsified at the speed of 4000 rpm for 5 min. The prepared emulsions were dropped into the petroleum heated at $170^{\circ}C$ to evaporate water in the silicon oil bath, dried at $120^{\circ}C$ in the oven the remove petroleum and calcined at temperature ranges from 600 to $900^{\circ}C$ for 48 hrs. The characteristics of powders were investigated by XRD, SEM, BET and electrochemical properties of synthesized cathode materials were measured with Galvanostatic system. $Li_{1.05}Mn_2O_4$ calcined at $800^{\circ}C$ for 48 hrs showed initial discharge capacity of 125.9mAH/g.

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References

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