• Title/Summary/Keyword: Li-ion (secondary) abrreries

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Electrical Characteristics of Cathode Li($Mn_{1-\delta}$$M_{\delta}$)$_2$$O_4$ Substituted by Transition Metals in Li-Ion Secondary Batteries (전이금속 치환 리튬이온 이차전지 정극 Li($Mn_{1-\delta}$$M_{\delta}$)$_2$$O_4$의 전기적 특성)

  • 박재홍;김정식;유광수
    • Journal of the Korean Ceramic Society
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    • v.37 no.5
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    • pp.466-472
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    • 2000
  • As cathode materials of LiMn2O4-based lithium-ion secondary batteries, Li(Mn1-$\delta$M$\delta$)2O4 (M=Ni and Co, $\delta$=0, 0.05, 0.1 and 0.2) materials which Co and Ni are substituted for Mn, were syntehsized by the solid state reaction at 80$0^{\circ}C$ for 48 hours. No second phases were formed in Li(Mn1-$\delta$M$\delta$)2O4 system with substitution of Co. However, substitution of Ni caued to form a second phase of NiO when its composition exceeded over 0.2 of $\delta$ in Li(Mn1-$\delta$M$\delta$)2O4. As the results of charging-discharging test, the maximum capacity of Li(Mn1-$\delta$M$\delta$)2O4 appeared in $\delta$=0.1 for both Co and Ni. Also, Li(Mn1-$\delta$M$\delta$)2O4 electrode showed higher capacity and better cycle performance than LiMn2O4.

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