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Title: Structural fatigue in spinel electrodes in Li/Li {sub 4}[Mn{sub 2}]O{sub 4} cells.

Abstract

Evidence of structural fatigue has been detected at the surface of discharged Li{sub x}[Mn{sub 2}]O{sub 4} spinel electrodes in Li/Li{sub x}[Mn{sub 2}]O{sub 4} cells. Transmission electron microscopy has revealed a degradation of the structural integrity of Li[Mn{sub 2}]O{sub 4} crystals in electrodes that were cycled between 3.3 and 2.2 V, where the transformation from cubic Li[Mn{sub 2}]O{sub 4} to tetragonal Li{sub 2}[Mn{sub 2}]O{sub 4} is expected. It has also been observed in cells cycled at voltages above the 3 V plateau that domains of tetragonal Li{sub 2}[Mn{sub 2}]O{sub 4} coexist with cubic Li[Mn{sub 2}]O{sub 4}, even at 500 mV above the thermodynamic voltage expected for the onset of the tetragonal phase. It is proposed that the presence of Li{sub 2}[Mn{sub 2}]O{sub 4} on the particle surface may contribute to some of the capacity fade observed during cycling of Li/Li{sub x}[Mn{sub 2}]O{sub 4} cells.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
942538
Report Number(s):
ANL/CMT/JA-32350
Journal ID: ISSN 0378-7753; JPSODZ; TRN: US200916%%517
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
J. Power Sources
Additional Journal Information:
Journal Volume: 82; Journal Issue: Sep. 1999; Journal ID: ISSN 0378-7753
Country of Publication:
United States
Language:
ENGLISH
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; LITHIUM; LITHIUM OXIDES; MANGANESE OXIDES; METAL-NONMETAL BATTERIES; ELECTRODES; FATIGUE; CRYSTAL-PHASE TRANSFORMATIONS

Citation Formats

Shao-Horn, Y., Hackney, S. A., Kahaian, A. J., Kepler, K. D., Skinner, E., Vaughey, J. T., Thackeray, M. M., Chemical Engineering, Michigan Technological Univ., and Univ. of Illinois. Structural fatigue in spinel electrodes in Li/Li {sub 4}[Mn{sub 2}]O{sub 4} cells.. United States: N. p., 1999. Web. doi:10.1016/S0378-7753(98)00223-7.
Shao-Horn, Y., Hackney, S. A., Kahaian, A. J., Kepler, K. D., Skinner, E., Vaughey, J. T., Thackeray, M. M., Chemical Engineering, Michigan Technological Univ., & Univ. of Illinois. Structural fatigue in spinel electrodes in Li/Li {sub 4}[Mn{sub 2}]O{sub 4} cells.. United States. doi:10.1016/S0378-7753(98)00223-7.
Shao-Horn, Y., Hackney, S. A., Kahaian, A. J., Kepler, K. D., Skinner, E., Vaughey, J. T., Thackeray, M. M., Chemical Engineering, Michigan Technological Univ., and Univ. of Illinois. Wed . "Structural fatigue in spinel electrodes in Li/Li {sub 4}[Mn{sub 2}]O{sub 4} cells.". United States. doi:10.1016/S0378-7753(98)00223-7.
@article{osti_942538,
title = {Structural fatigue in spinel electrodes in Li/Li {sub 4}[Mn{sub 2}]O{sub 4} cells.},
author = {Shao-Horn, Y. and Hackney, S. A. and Kahaian, A. J. and Kepler, K. D. and Skinner, E. and Vaughey, J. T. and Thackeray, M. M. and Chemical Engineering and Michigan Technological Univ. and Univ. of Illinois},
abstractNote = {Evidence of structural fatigue has been detected at the surface of discharged Li{sub x}[Mn{sub 2}]O{sub 4} spinel electrodes in Li/Li{sub x}[Mn{sub 2}]O{sub 4} cells. Transmission electron microscopy has revealed a degradation of the structural integrity of Li[Mn{sub 2}]O{sub 4} crystals in electrodes that were cycled between 3.3 and 2.2 V, where the transformation from cubic Li[Mn{sub 2}]O{sub 4} to tetragonal Li{sub 2}[Mn{sub 2}]O{sub 4} is expected. It has also been observed in cells cycled at voltages above the 3 V plateau that domains of tetragonal Li{sub 2}[Mn{sub 2}]O{sub 4} coexist with cubic Li[Mn{sub 2}]O{sub 4}, even at 500 mV above the thermodynamic voltage expected for the onset of the tetragonal phase. It is proposed that the presence of Li{sub 2}[Mn{sub 2}]O{sub 4} on the particle surface may contribute to some of the capacity fade observed during cycling of Li/Li{sub x}[Mn{sub 2}]O{sub 4} cells.},
doi = {10.1016/S0378-7753(98)00223-7},
journal = {J. Power Sources},
issn = {0378-7753},
number = Sep. 1999,
volume = 82,
place = {United States},
year = {1999},
month = {9}
}