<P>Thickness variation of the solid electrolyte interphase (SEI) produced during charge-discharge cycling is investigated to analyze the effect of SEI on the electrochemical properties of LiMn<SUB>2</SUB>O<SUB>4</SUB>. At...
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https://www.riss.kr/link?id=A107482085
2015
-
SCI,SCIE,SCOPUS
학술저널
103-107(5쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>Thickness variation of the solid electrolyte interphase (SEI) produced during charge-discharge cycling is investigated to analyze the effect of SEI on the electrochemical properties of LiMn<SUB>2</SUB>O<SUB>4</SUB>. At...
<P>Thickness variation of the solid electrolyte interphase (SEI) produced during charge-discharge cycling is investigated to analyze the effect of SEI on the electrochemical properties of LiMn<SUB>2</SUB>O<SUB>4</SUB>. Atomic force microscopy (AFM) is used to measure the SEI thickness and elastic modulus on the LiMn<SUB>2</SUB>O<SUB>4</SUB> surface. The SEI shows a broad thickness distribution due to the random nature of the LiMn<SUB>2</SUB>O<SUB>4</SUB> electrode surfaces, while the average SEI thickness increases with cycling and stabilizes after the 20<SUP>th</SUP> cycle. Formation of a relatively thin SEI on the LiMn<SUB>2</SUB>O<SUB>4</SUB> surface accompanies low Coulombic efficiency at early cycling stages. The SEI produced in the early stages of cycling is vulnerable to capacity fading due to inefficient surface protection against possible side reactions. A fully-grown stable SEI after 20 cycles shields the cathode surface from the electrolyte, minimizing capacity fading.</P>
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