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Multi-functional Zwitterionic Compounds as Additives for Lithium-battery Electrolytes

등록일
2006년 10월 16일 12시 49분 27초
접수번호
1304
발표코드
32P567포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 <발표Ⅰ>
발표형식
포스터
발표분야
전기화학
저자 및
공동저자
N.D.Quan, 이현주1, 김훈식2
한국과학기술연구원&경희대학교 화학과,
1한국과학기술연구원,
2경희대학교 화학과,
A series of zwitterionic compounds having both ester and sulfonate groups were synthesized and their electrochemical properties were investigated. FT-IR study clearly demonstrates that they are able to interact with Li+ ions through both of their functional groups. The effect of added zwitterionic compounds on the cycling performance of the cell containing 1M LiPF6 in EC, DMC, and EMC (1/1/1 by vol.) was also examined. The cell capacity with the addition of either 2.25 wt.% N-methylpyrrolidinium-N-(propyl sulfonate) (MePyS) or N-methylpiperidinium-N-(propyl sulfonate) (MePipS) as an additive dropped significantly at higher C-rate of 1C, whereas such a sharp decrease of the performance at higher C-rate was not observed when MePyS or MePipS was replaced by N-(2-acetoxyethyl) pyrrolidinium-N-(propyl sulfonate) (EsPyS) or N-(2-acetoxyethyl) piperidinium-N-(propyl sulfonate) (EsPipS), implying the positive role of the ester functional group.

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