File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

강석주

Kang, Seok Ju
Smart Materials for Energy Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Critical Role of Cations in Lithium Sites on Extended Electrochemical Reversibility of Co-Rich Layered Oxide

Author(s)
Cho, WoongraeMyeong, SeungjunKim, NamhyungLee, SanghanKim, YoungkiKim, MaengsukKang, Seok JuPark, NoejungOh, PilgunCho, Jaephil
Issued Date
2017-06
DOI
10.1002/adma.201605578
URI
https://scholarworks.unist.ac.kr/handle/201301/22224
Fulltext
http://onlinelibrary.wiley.com/doi/10.1002/adma.201605578/abstract
Citation
ADVANCED MATERIALS, v.29, no.21, pp.1605578
Abstract
Only a very limited amount of the high theoretical energy density of LiCoO2 as a cathode material has been realized, due to its irreversible deterioration when more than 0.6 mol of lithium ions are extracted. In this study, new insights into the origin of such low electrochemical reversibility, namely the structural collapse caused by electrostatic repulsion between oxygen ions during the charge process are suggested. By incorporating the partial cation migration of LiNiO2, which produces a screen effect of cations in the 3b-Li site, the phase distortion of LiCoO2 is successfully delayed which in turn expands its electrochemical reversibility. This study elucidates the relationship between the structural reversibility and electrochemical behavior of layered cathode materials and enables new design of Co-rich layered materials for cathodes with high energy density.
Publisher
WILEY-V C H VERLAG GMBH
ISSN
0935-9648
Keyword
POSITIVE-ELECTRODE MATERIALSX-RAY-DIFFRACTIONION BATTERIESCATHODE MATERIALSLI-IONPHYSICAL-PROPERTIESPHASE-RELATIONSHIPSGAS EVOLUTIONLICOO2CELLS

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.