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Title: Effect of surface structure on the irreversible capacity of various graphitic carbon electrodes

Abstract

In order to understand the structural effect on irreversible capacity, the electrochemical lithium intercalation of various graphitic carbons was studied in 1 M LiPF{sub 6} solution of ethylene carbonate/propylene carbonate/diethyl carbonate (EC/PC/DEC), as a function of PC content. Because the irreversible capacity was increased by PC only for the carbons with a considerable edge fraction, it was possible to selectively amplify and monitor the reaction on the edge surface. The important role of the edge surface was confirmed qualitatively by high resolution transmission electron microscope images of the surface structure and quantitatively by further analysis on the results, using a simple model that explicitly considered the different reactivity of EC and PC toward the basal and edge surfaces. Exfoliation behavior, emerging as the PC content increased above a certain structure-dependent threshold, was examined also. The structural effect could be explained by assuming that the cointercalation of PC gave rise to exfoliation. Two controlling factors were suggested: the structural integrity affecting the expansion of layer spacing and the geometry of the edge surface affecting the cointercalation of PC.

Authors:
; ; ;  [1]
  1. LG Chemical Ltd., Taejon (Korea, Republic of). Battery Research Center
Publication Date:
OSTI Identifier:
354407
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 146; Journal Issue: 5; Other Information: PBD: May 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; METAL-NONMETAL BATTERIES; LITHIUM; ANODES; GRAPHITE; SURFACE PROPERTIES; MORPHOLOGY; ELECTRICAL PROPERTIES; CLATHRATES

Citation Formats

Chung, G C, Jun, S H, Lee, K Y, and Kim, M H. Effect of surface structure on the irreversible capacity of various graphitic carbon electrodes. United States: N. p., 1999. Web. doi:10.1149/1.1391823.
Chung, G C, Jun, S H, Lee, K Y, & Kim, M H. Effect of surface structure on the irreversible capacity of various graphitic carbon electrodes. United States. doi:10.1149/1.1391823.
Chung, G C, Jun, S H, Lee, K Y, and Kim, M H. Sat . "Effect of surface structure on the irreversible capacity of various graphitic carbon electrodes". United States. doi:10.1149/1.1391823.
@article{osti_354407,
title = {Effect of surface structure on the irreversible capacity of various graphitic carbon electrodes},
author = {Chung, G C and Jun, S H and Lee, K Y and Kim, M H},
abstractNote = {In order to understand the structural effect on irreversible capacity, the electrochemical lithium intercalation of various graphitic carbons was studied in 1 M LiPF{sub 6} solution of ethylene carbonate/propylene carbonate/diethyl carbonate (EC/PC/DEC), as a function of PC content. Because the irreversible capacity was increased by PC only for the carbons with a considerable edge fraction, it was possible to selectively amplify and monitor the reaction on the edge surface. The important role of the edge surface was confirmed qualitatively by high resolution transmission electron microscope images of the surface structure and quantitatively by further analysis on the results, using a simple model that explicitly considered the different reactivity of EC and PC toward the basal and edge surfaces. Exfoliation behavior, emerging as the PC content increased above a certain structure-dependent threshold, was examined also. The structural effect could be explained by assuming that the cointercalation of PC gave rise to exfoliation. Two controlling factors were suggested: the structural integrity affecting the expansion of layer spacing and the geometry of the edge surface affecting the cointercalation of PC.},
doi = {10.1149/1.1391823},
journal = {Journal of the Electrochemical Society},
number = 5,
volume = 146,
place = {United States},
year = {1999},
month = {5}
}