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A Study on the Electrochemical Properties for Effect of Additive of the Lithium Metal Anode

리튬 금속 음극의 첨가제 효과에 따른 전기 화학적 특성에 관한 연구

  • Cho, S.M. (Korea Institute of Science and Technology(KIST)) ;
  • Lee, S.W. (Korea Institute of Science and Technology(KIST)) ;
  • Cho, B.W. (Korea Institute of Science and Technology(KIST)) ;
  • Ju, J.B. (Dept. of Chemical Engeering, Hong-Ik University) ;
  • Sohn, T.W. (Dept. of Chemical Engeering, Hong-Ik University)
  • 조성미 (한국과학기술연구원 나노환경연구센터) ;
  • 조원일 (한국과학기술연구원 나노환경연구센터) ;
  • 조병원 (한국과학기술연구원 나노환경연구센터) ;
  • 주재백 (홍익대학교 화학공학과) ;
  • 손태원 (홍익대학교 화학공학과)
  • Published : 2002.08.01

Abstract

The use of lithium metal anode at lithium metal secondary battery can provide the very high energy density. Nevertheless, there are some problems that are short cycle life, lack of safety and poor thermal stability. Cycle life and cycling efficiency decline due to passivating films, dendritic lithium and increasing surface film by the reaction of lithium metal and electrolyte. This work investigated the additive effect of benzene, toluene, tetram-ethylethylenediamine, into the electrolyte. The cycling efficiency and cyclability are improved. The reason is confirmed by decreasing film resistance and increasing polarization resistance at AC impedance analysis. Electrolyte additive has a relatively less reactivity than electrolytes lithium and is adsorbed on lithium leading to suppression of the reaction between the electrolyte and lithium as well as an improvement in the lithium deposition mophology.

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