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Title: Structural phase transition and electrode characteristics of LiMn{sub 2{minus}x}Mg{sub x}O{sub 4} positive electrode material for the lithium secondary battery

Abstract

With in mind improving the cycle performance of 4V class lithium manganese oxide positive electrode material for the lithium secondary battery, the authors have been investigating the effects of partial substitution of Mn by another metal. The crystal phase transition in the quaternary spinel LiMn{sub 2{minus}x}Mg{sub x}O{sub 4} was studied by neutron powder diffraction at 200K and DSC measurements at low temperatures. They find that substituting Mn by Mg resulted in a more stable crystal structure with the Jahn-Teller transition suppressed down to low temperature. The charge-discharge characteristics of these positive electrode active materials were investigated at 4V range. Although the discharge capacity decreased with increasing Mg content, the cycle performance was improved with increasing Mg content.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
750623
Report Number(s):
ANL/IPNS/CP-100682
TRN: AH200019%%106
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 196th Meeting of the Electrochemical Society, Honolulu, HI (US), 10/17/1999--10/22/1999; Other Information: PBD: 10 Dec 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; METAL-NONMETAL BATTERIES; CATHODES; LITHIUM OXIDES; MAGNESIUM OXIDES; MANGANESE OXIDES; CRYSTAL-PHASE TRANSFORMATIONS; ELECTRICAL PROPERTIES; JAHN-TELLER EFFECT; CRYSTAL STRUCTURE

Citation Formats

Idemoto, Y, Udagawa, K, Koura, N, Richardson, J. W., Jr., Takeuchi, K, and Loong, C -K. Structural phase transition and electrode characteristics of LiMn{sub 2{minus}x}Mg{sub x}O{sub 4} positive electrode material for the lithium secondary battery. United States: N. p., 1999. Web.
Idemoto, Y, Udagawa, K, Koura, N, Richardson, J. W., Jr., Takeuchi, K, & Loong, C -K. Structural phase transition and electrode characteristics of LiMn{sub 2{minus}x}Mg{sub x}O{sub 4} positive electrode material for the lithium secondary battery. United States.
Idemoto, Y, Udagawa, K, Koura, N, Richardson, J. W., Jr., Takeuchi, K, and Loong, C -K. Fri . "Structural phase transition and electrode characteristics of LiMn{sub 2{minus}x}Mg{sub x}O{sub 4} positive electrode material for the lithium secondary battery". United States. https://www.osti.gov/servlets/purl/750623.
@article{osti_750623,
title = {Structural phase transition and electrode characteristics of LiMn{sub 2{minus}x}Mg{sub x}O{sub 4} positive electrode material for the lithium secondary battery},
author = {Idemoto, Y and Udagawa, K and Koura, N and Richardson, J. W., Jr. and Takeuchi, K and Loong, C -K},
abstractNote = {With in mind improving the cycle performance of 4V class lithium manganese oxide positive electrode material for the lithium secondary battery, the authors have been investigating the effects of partial substitution of Mn by another metal. The crystal phase transition in the quaternary spinel LiMn{sub 2{minus}x}Mg{sub x}O{sub 4} was studied by neutron powder diffraction at 200K and DSC measurements at low temperatures. They find that substituting Mn by Mg resulted in a more stable crystal structure with the Jahn-Teller transition suppressed down to low temperature. The charge-discharge characteristics of these positive electrode active materials were investigated at 4V range. Although the discharge capacity decreased with increasing Mg content, the cycle performance was improved with increasing Mg content.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {12}
}

Conference:
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