Synthesis and characterization of lithium manganese oxides with core-shell Li4Mn5O12@Li2MnO3 structure as lithium battery electrode materials

Yumei Li; Yoji Makita; Zhenzhen Lin; Shuangmei Lin; Noriyuki Nagaoka; Xiaojing Yang

doi:10.1016/j.ssi.2011.06.005

Synthesis and characterization of lithium manganese oxides with core-shell Li₄Mn₅O₁₂@Li₂MnO₃ structure as lithium battery electrode materials

Yumei Li, Yoji Makita, Zhenzhen Lin, Shuangmei Lin, Noriyuki Nagaoka, Xiaojing Yang

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

By a facile LiNO₃ flux method, lithium manganese oxide composites (xLi₄Mn₅O₁₂· yLi ₂MnO₃) were synthesized using a hierarchical organization precursor of manganese dioxide. Li₄Mn₅O₁₂ and Li₂MnO₃ have spinel and rocksalt structures, respectively. The lithiation and structural transformation from the precursor to the composites occurred topotactically from exterior toward interior in the precursor particle with the increase of reaction time, and the composites had core-shell spinel@rocksalt structures in addition to the original hierarchical core-shell organization. The electrochemical measurements at 50 °C after 50 cycles confirmed that a typical spinel@rocksalt cathode had higher capacity retention (87.1%) than that with the composition close to the stoichiometric spinel (64.6%), indicating the Li₂MnO₃ shell can improve cycling stability for the composite electrode at elevated temperature.

Original language	English
Pages (from-to)	34-40
Number of pages	7
Journal	Solid State Ionics
Volume	196
Issue number	1
DOIs	https://doi.org/10.1016/j.ssi.2011.06.005
Publication status	Published - Aug 11 2011
Externally published	Yes

Keywords

Cathode materials
Charge/discharge
Core-shell
Lithium manganese oxides

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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@article{6d7dc47d3dbd4213a04f359057fb7fe9,

title = "Synthesis and characterization of lithium manganese oxides with core-shell Li4Mn5O12@Li2MnO3 structure as lithium battery electrode materials",

abstract = "By a facile LiNO3 flux method, lithium manganese oxide composites (xLi4Mn5O12· yLi 2MnO3) were synthesized using a hierarchical organization precursor of manganese dioxide. Li4Mn5O12 and Li2MnO3 have spinel and rocksalt structures, respectively. The lithiation and structural transformation from the precursor to the composites occurred topotactically from exterior toward interior in the precursor particle with the increase of reaction time, and the composites had core-shell spinel@rocksalt structures in addition to the original hierarchical core-shell organization. The electrochemical measurements at 50 °C after 50 cycles confirmed that a typical spinel@rocksalt cathode had higher capacity retention (87.1%) than that with the composition close to the stoichiometric spinel (64.6%), indicating the Li2MnO3 shell can improve cycling stability for the composite electrode at elevated temperature.",

keywords = "Cathode materials, Charge/discharge, Core-shell, Lithium manganese oxides",

author = "Yumei Li and Yoji Makita and Zhenzhen Lin and Shuangmei Lin and Noriyuki Nagaoka and Xiaojing Yang",

note = "Funding Information: This work is supported by the National Science Foundation of China (no. 50872012 ).",

year = "2011",

month = aug,

day = "11",

doi = "10.1016/j.ssi.2011.06.005",

language = "English",

volume = "196",

pages = "34--40",

journal = "Solid State Ionics",

issn = "0167-2738",

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number = "1",

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T1 - Synthesis and characterization of lithium manganese oxides with core-shell Li4Mn5O12@Li2MnO3 structure as lithium battery electrode materials

AU - Li, Yumei

AU - Makita, Yoji

AU - Lin, Zhenzhen

AU - Lin, Shuangmei

AU - Nagaoka, Noriyuki

AU - Yang, Xiaojing

N1 - Funding Information: This work is supported by the National Science Foundation of China (no. 50872012 ).

PY - 2011/8/11

Y1 - 2011/8/11

N2 - By a facile LiNO3 flux method, lithium manganese oxide composites (xLi4Mn5O12· yLi 2MnO3) were synthesized using a hierarchical organization precursor of manganese dioxide. Li4Mn5O12 and Li2MnO3 have spinel and rocksalt structures, respectively. The lithiation and structural transformation from the precursor to the composites occurred topotactically from exterior toward interior in the precursor particle with the increase of reaction time, and the composites had core-shell spinel@rocksalt structures in addition to the original hierarchical core-shell organization. The electrochemical measurements at 50 °C after 50 cycles confirmed that a typical spinel@rocksalt cathode had higher capacity retention (87.1%) than that with the composition close to the stoichiometric spinel (64.6%), indicating the Li2MnO3 shell can improve cycling stability for the composite electrode at elevated temperature.

AB - By a facile LiNO3 flux method, lithium manganese oxide composites (xLi4Mn5O12· yLi 2MnO3) were synthesized using a hierarchical organization precursor of manganese dioxide. Li4Mn5O12 and Li2MnO3 have spinel and rocksalt structures, respectively. The lithiation and structural transformation from the precursor to the composites occurred topotactically from exterior toward interior in the precursor particle with the increase of reaction time, and the composites had core-shell spinel@rocksalt structures in addition to the original hierarchical core-shell organization. The electrochemical measurements at 50 °C after 50 cycles confirmed that a typical spinel@rocksalt cathode had higher capacity retention (87.1%) than that with the composition close to the stoichiometric spinel (64.6%), indicating the Li2MnO3 shell can improve cycling stability for the composite electrode at elevated temperature.

KW - Cathode materials

KW - Charge/discharge

KW - Core-shell

KW - Lithium manganese oxides

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