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Title: Electrochemical and structural characterization of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} (0 {le} y {le} 0.2) positive electrodes during initial cycling

Abstract

The initial charge/discharge behavior of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} (0 {le} y {le} 0.2) positive electrodes has been closely examined by neutron diffraction, X-ray diffraction, X-ray absorption, and electrochemical methods. Charge/discharge experiments and neutron diffraction refinements show that capacity loss during the initial cycling of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} (0 {le} y {le} 0.2) increases linearly with the excess nickel content controlled by cobalt substitution for nickel. Charge/discharge cycling with gradually increasing depth of charge indicates that most of the initial capacity loss takes place in the early stages of the first charge. X-ray absorption near-edge spectra reveal that the nickel and cobalt ions in Li{sub 1{minus}x}Ni{sub 1{minus}y}Co{sub y}O{sub 2} are simultaneously oxidized and that the local structure of MO{sub 6} (M = Ni, Co) octahedra is slightly distorted upon lithium deintercalation.

Authors:
;
Publication Date:
Research Org.:
Yonsei Univ., Seoul (KR)
OSTI Identifier:
20080567
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 147; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0013-4651
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; LITHIUM OXIDES; NICKEL OXIDES; COBALT OXIDES; METAL-NONMETAL BATTERIES; CATHODES; BATTERY CHARGING; VOLTAGE DROP; ELECTRONIC STRUCTURE; MORPHOLOGICAL CHANGES

Citation Formats

Lee, K.K., and Kim, K.B. Electrochemical and structural characterization of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} (0 {le} y {le} 0.2) positive electrodes during initial cycling. United States: N. p., 2000. Web. doi:10.1149/1.1393422.
Lee, K.K., & Kim, K.B. Electrochemical and structural characterization of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} (0 {le} y {le} 0.2) positive electrodes during initial cycling. United States. doi:10.1149/1.1393422.
Lee, K.K., and Kim, K.B. Mon . "Electrochemical and structural characterization of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} (0 {le} y {le} 0.2) positive electrodes during initial cycling". United States. doi:10.1149/1.1393422.
@article{osti_20080567,
title = {Electrochemical and structural characterization of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} (0 {le} y {le} 0.2) positive electrodes during initial cycling},
author = {Lee, K.K. and Kim, K.B.},
abstractNote = {The initial charge/discharge behavior of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} (0 {le} y {le} 0.2) positive electrodes has been closely examined by neutron diffraction, X-ray diffraction, X-ray absorption, and electrochemical methods. Charge/discharge experiments and neutron diffraction refinements show that capacity loss during the initial cycling of LiNi{sub 1{minus}y}Co{sub y}O{sub 2} (0 {le} y {le} 0.2) increases linearly with the excess nickel content controlled by cobalt substitution for nickel. Charge/discharge cycling with gradually increasing depth of charge indicates that most of the initial capacity loss takes place in the early stages of the first charge. X-ray absorption near-edge spectra reveal that the nickel and cobalt ions in Li{sub 1{minus}x}Ni{sub 1{minus}y}Co{sub y}O{sub 2} are simultaneously oxidized and that the local structure of MO{sub 6} (M = Ni, Co) octahedra is slightly distorted upon lithium deintercalation.},
doi = {10.1149/1.1393422},
journal = {Journal of the Electrochemical Society},
issn = {0013-4651},
number = 5,
volume = 147,
place = {United States},
year = {2000},
month = {5}
}