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ISSN : 1225-0112(Print)
ISSN : 2288-4505(Online)
Applied Chemistry for Engineering Vol.10 No.6 pp.832-837
DOI :

RESEARCH PAPERS : Stabilization of LiMnO4 Electrode for Lithium Secondary Battery (2) - Stability of Substituted LMnO4 in Aqueous System -

Jin Sik Lee

Abstract

Stability of a cathode material was determined by Tafel plot in 1 M LiOH solution. The stabilized LiMxMn2-xO4(x=0.05∼0.1) electrode resulted in overpotential of 0.13∼0.15 mV at 100 mA. This overpotential was 0.05 mV lower than that of the spinel structured LiMn2O4electrode. Conductivity test at various potentials showed that the conductivity of LiMxMn2-xO4was higher than that of the spinel structured LiMn2O4and the bulk resistance of LiMxMn2-xO4due to the dissolution of Mn2+was lowered.

연구논문 : 리튬이차전지용 정극활물질 LiMn2O4 의 안정화 (2) - 수용액계에서 치환형 LiMn2O4 의 안정성 -

이진식,이철태

초록

수용애계에서 정극활물질의 안정성을 1 M LiOH 용액에서 Tafel plot를 통해서 측정하였으며, 이 때 LiMxMn2-xO4(x=0.05∼0.1) 전극은 100 mA에서 0.13∼0.15 mV의 과전압으로 LiMn2O4전극보다 0.05 mV가 낮은 과전압을 나타냈다. 또한 전위변화에 따른 전해질의 전도도는 LiMxMn2-xO4가 스피넬 구조의 LiMn2O4보다 높고 나타났으며, Mn+2의 용액에 의한 용액저항은 상대적으로 낮게 나타났다.

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