Cycle mechanism and electrochemical properties of lithium manganese oxide prepared using different Mn sources

S. H. Park; H. S. Ahn; G. J. Park; J. Kim; Y. S. Lee

doi:10.1016/j.matchemphys.2008.06.028

Cycle mechanism and electrochemical properties of lithium manganese oxide prepared using different Mn sources

S. H. Park
, H. S. Ahn
, G. J. Park
, J. Kim
, Y. S. Lee^*

^*Corresponding author for this work

Division of Chemical Engineering

Samsung
Seoul National University
Chonnam National University

Research output: Contribution to journal › Journal article › peer-review

33 Scopus citations

Abstract

Li₂MnO₃ powders were synthesized using the solid-state reaction with different Mn sources (Mn₃O₄ and γ-MnOOH). The Li₂MnO₃ powders were characterized by means of XRD, SEM, TEM, and electrochemical testing. The resulting Li₂MnO₃ powders showed different physical properties and electrochemical reversible capacities depending on their synthetic temperatures and Mn sources. The obtained discharge capacities of two Li₂MnO₃ materials decreased with increasing calcination temperature. The Li₂MnO₃ synthesized using Mn₃O₄ as the starting material showed a high discharge capacity over 160 mAh g^-1 after 25th cycle. It was found that the resulting Li₂MnO₃ powder using Mn₃O₄ was a composite consisting of monoclinic Li₂MnO₃, LiMnO₂, and LiMn₂O₄ phases. The reversible discharge capacity of Li₂MnO₃ in this study originated from the transformation between layered LiMnO₂ and cubic LiMn₂O₄ phases, which was confirmed by the differential capacity, ex situ XRD, and HRTEM results.

Original language	English
Pages (from-to)	696-701
Number of pages	6
Journal	Materials Chemistry and Physics
Volume	112
Issue number	2
DOIs	https://doi.org/10.1016/j.matchemphys.2008.06.028
State	Published - 2008.12.1

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This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Cathode materials
Composite electrode
Electrochemical properties
LiMnO
Lithium secondary battery
Phase transformation

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10.1016/j.matchemphys.2008.06.028

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@article{df08ad4239d243d39e4a537a7c207b78,

title = "Cycle mechanism and electrochemical properties of lithium manganese oxide prepared using different Mn sources",

abstract = "Li2MnO3 powders were synthesized using the solid-state reaction with different Mn sources (Mn3O4 and γ-MnOOH). The Li2MnO3 powders were characterized by means of XRD, SEM, TEM, and electrochemical testing. The resulting Li2MnO3 powders showed different physical properties and electrochemical reversible capacities depending on their synthetic temperatures and Mn sources. The obtained discharge capacities of two Li2MnO3 materials decreased with increasing calcination temperature. The Li2MnO3 synthesized using Mn3O4 as the starting material showed a high discharge capacity over 160 mAh g-1 after 25th cycle. It was found that the resulting Li2MnO3 powder using Mn3O4 was a composite consisting of monoclinic Li2MnO3, LiMnO2, and LiMn2O4 phases. The reversible discharge capacity of Li2MnO3 in this study originated from the transformation between layered LiMnO2 and cubic LiMn2O4 phases, which was confirmed by the differential capacity, ex situ XRD, and HRTEM results.",

keywords = "Cathode materials, Composite electrode, Electrochemical properties, LiMnO, Lithium secondary battery, Phase transformation",

author = "Park, \{S. H.\} and Ahn, \{H. S.\} and Park, \{G. J.\} and J. Kim and Lee, \{Y. S.\}",

year = "2008",

month = dec,

day = "1",

doi = "10.1016/j.matchemphys.2008.06.028",

language = "English",

volume = "112",

pages = "696--701",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

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TY - JOUR

T1 - Cycle mechanism and electrochemical properties of lithium manganese oxide prepared using different Mn sources

AU - Park, S. H.

AU - Ahn, H. S.

AU - Park, G. J.

AU - Kim, J.

AU - Lee, Y. S.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - Li2MnO3 powders were synthesized using the solid-state reaction with different Mn sources (Mn3O4 and γ-MnOOH). The Li2MnO3 powders were characterized by means of XRD, SEM, TEM, and electrochemical testing. The resulting Li2MnO3 powders showed different physical properties and electrochemical reversible capacities depending on their synthetic temperatures and Mn sources. The obtained discharge capacities of two Li2MnO3 materials decreased with increasing calcination temperature. The Li2MnO3 synthesized using Mn3O4 as the starting material showed a high discharge capacity over 160 mAh g-1 after 25th cycle. It was found that the resulting Li2MnO3 powder using Mn3O4 was a composite consisting of monoclinic Li2MnO3, LiMnO2, and LiMn2O4 phases. The reversible discharge capacity of Li2MnO3 in this study originated from the transformation between layered LiMnO2 and cubic LiMn2O4 phases, which was confirmed by the differential capacity, ex situ XRD, and HRTEM results.

AB - Li2MnO3 powders were synthesized using the solid-state reaction with different Mn sources (Mn3O4 and γ-MnOOH). The Li2MnO3 powders were characterized by means of XRD, SEM, TEM, and electrochemical testing. The resulting Li2MnO3 powders showed different physical properties and electrochemical reversible capacities depending on their synthetic temperatures and Mn sources. The obtained discharge capacities of two Li2MnO3 materials decreased with increasing calcination temperature. The Li2MnO3 synthesized using Mn3O4 as the starting material showed a high discharge capacity over 160 mAh g-1 after 25th cycle. It was found that the resulting Li2MnO3 powder using Mn3O4 was a composite consisting of monoclinic Li2MnO3, LiMnO2, and LiMn2O4 phases. The reversible discharge capacity of Li2MnO3 in this study originated from the transformation between layered LiMnO2 and cubic LiMn2O4 phases, which was confirmed by the differential capacity, ex situ XRD, and HRTEM results.

KW - Cathode materials

KW - Composite electrode

KW - Electrochemical properties

KW - LiMnO

KW - Lithium secondary battery

KW - Phase transformation

UR - https://www.scopus.com/pages/publications/53349171220

U2 - 10.1016/j.matchemphys.2008.06.028

DO - 10.1016/j.matchemphys.2008.06.028

M3 - Journal article

AN - SCOPUS:53349171220

SN - 0254-0584

VL - 112

SP - 696

EP - 701

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 2

ER -

Cycle mechanism and electrochemical properties of lithium manganese oxide prepared using different Mn sources

Abstract

UN SDGs

Keywords

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