Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Synthesis and Electrochemical Properties of $LiNi_{1-y-z}(M_1)_y(M_2)_zO_2$ for the Development of Cathode Materials with Large Capacity

고용량 양극재료 개발을 위한 $LiNi_{1-y-z}(M_1)_y(M_2)_zO_2$의 합성과 전기화학적 특성

  • Song, Myoung-Youp (Division of Advanced Materials Engineering, Nanomaterial Processing Research Center, Engineering Research Institute, Chonbuk National University)
  • 송명엽 (전북대학교 신소재공학부 공학연구원 나노소재공정연구센터)
  • Published : 2007.09.15
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Abstract

[ $LiNi_{0.995}Al_{0.005}O_2$ ], $LiNi_{0.990}Ti_{0.010}O_2$ and $LiNi_{0.0990}Al_{0.005}Ti_{0.005}O_2$ were synthesized with a combustion method by calcining in an $O_2$ stream at $750^{\circ}C$ for 36 h. The X-ray diffraction patterns of these synthesized samples showed $-NaFeO_2$ structure of rhombohedral system(space group; $R{\bar{3}}\;m$) with no evidence of impurities. Among these samples, $LiNi_{0.995}Al_{0.005}O_2$ exhibited comparatively high first discharge capacity and discharge capacity, and the best cycling performance. $LiNi_{0.995}Al_{0.005}O_2$ had the first discharge capacity of 165.2 mA h/g and a discharge capacity of 116.7 mA h/g at the 50th cycle at 0.1C rate. It showed the first discharge capacity of 141.0 mA h/g and a discharge capacity of 93.5 mA h/g at the 50th cycle at 0.5C rate.

Keywords

References

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