Reaction mechanisms for 0.5Li2MnO3·0.5LiMn0.5Ni0.5O2 precursor prepared by low-heating solid state reaction

Lithium-excess manganese layered oxides, which are commonly described in chemical formula 0.5Li2MnO3·0.5LiMn0.5Ni0.5O2, were prepared by low-heating solid state reaction. The reaction mechanisms of synthesizing precursors, the decomposition mechanism, and intermediate materials in calcination were i...

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Published in:International journal of minerals, metallurgy and materials metallurgy and materials, 2012-09, Vol.19 (9), p.856-862
Main Authors: Li, Dong, Lian, Fang, Hou, Xin-mei, Chou, Kuo-chih
Format: Article
Language:English
Subjects:
Calorimetry
Ceramics
Characterization and Evaluation of Materials
Chemical synthesis
Chemistry and Materials Science
Composites
Corrosion and Coatings
Decomposition reactions
Diffraction patterns
Emission analysis
FESEM
Field emission microscopy
Fourier transforms
Glass
Heating
Infrared spectroscopy
Lithium
Manganese
Materials Science
Metallic Materials
Natural Materials
Precursors
Reaction mechanisms
Solid state
Surfaces and Interfaces
Thermogravimetric analysis
Thin Films
Tribology
X-ray diffraction
X-射线衍射
低热固相反应
傅里叶变换红外光谱
前驱物
反应机制
场发射扫描电子显微镜
差示扫描量热法
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description Lithium-excess manganese layered oxides, which are commonly described in chemical formula 0.5Li2MnO3·0.5LiMn0.5Ni0.5O2, were prepared by low-heating solid state reaction. The reaction mechanisms of synthesizing precursors, the decomposition mechanism, and intermediate materials in calcination were investigated by means of Fourier transform infrared spectroscopy （FT-IR）, X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM）, thermogravimetric analysis （TGA）, and differential scanning calorimetry （DSC）. The major diffraction patterns of 0.5Li2MnO3·0.5LiMn0.5Ni0.5O2 powder calcinated at 720℃ for 15 h are indexed to the hexagonal structure with a space group of R3m, and the clear splits of doublets at （006）/（102） and （108）/（110） indicate that the sample adopts a well-layered structure. FESEM images show that the size of the agglomerated particles of the sample ranges from 100 to 300 nm.
doi_str_mv 10.1007/s12613-012-0639-6
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The reaction mechanisms of synthesizing precursors, the decomposition mechanism, and intermediate materials in calcination were investigated by means of Fourier transform infrared spectroscopy （FT-IR）, X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM）, thermogravimetric analysis （TGA）, and differential scanning calorimetry （DSC）. The major diffraction patterns of 0.5Li2MnO3·0.5LiMn0.5Ni0.5O2 powder calcinated at 720℃ for 15 h are indexed to the hexagonal structure with a space group of R3m, and the clear splits of doublets at （006）/（102） and （108）/（110） indicate that the sample adopts a well-layered structure. FESEM images show that the size of the agglomerated particles of the sample ranges from 100 to 300 nm.</description><identifier>ISSN: 1674-4799</identifier><identifier>EISSN: 1869-103X</identifier><identifier>DOI: 10.1007/s12613-012-0639-6</identifier><language>eng</language><publisher>Springer Berlin Heidelberg: University of Science and Technology Beijing</publisher><subject>Calorimetry ; Ceramics ; Characterization and Evaluation of Materials ; Chemical synthesis ; Chemistry and Materials Science ; Composites ; Corrosion and Coatings ; Decomposition reactions ; Diffraction patterns ; Emission analysis ; FESEM ; Field emission microscopy ; Fourier transforms ; Glass ; Heating ; Infrared spectroscopy ; Lithium ; Manganese ; Materials Science ; Metallic Materials ; Natural Materials ; Precursors ; Reaction mechanisms ; Solid state ; Surfaces and Interfaces ; Thermogravimetric analysis ; Thin Films ; Tribology ; X-ray diffraction ; X-射线衍射 ; 低热固相反应 ; 傅里叶变换红外光谱 ; 前驱物 ; 反应机制 ; 场发射扫描电子显微镜 ; 差示扫描量热法</subject><ispartof>International journal of minerals, metallurgy and materials, 2012-09, Vol.19 (9), p.856-862</ispartof><rights>University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg 2012</rights><rights>University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg 2012.</rights><rights>Copyright © Wanfang Data Co. 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The reaction mechanisms of synthesizing precursors, the decomposition mechanism, and intermediate materials in calcination were investigated by means of Fourier transform infrared spectroscopy （FT-IR）, X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM）, thermogravimetric analysis （TGA）, and differential scanning calorimetry （DSC）. The major diffraction patterns of 0.5Li2MnO3·0.5LiMn0.5Ni0.5O2 powder calcinated at 720℃ for 15 h are indexed to the hexagonal structure with a space group of R3m, and the clear splits of doublets at （006）/（102） and （108）/（110） indicate that the sample adopts a well-layered structure. 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The reaction mechanisms of synthesizing precursors, the decomposition mechanism, and intermediate materials in calcination were investigated by means of Fourier transform infrared spectroscopy （FT-IR）, X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM）, thermogravimetric analysis （TGA）, and differential scanning calorimetry （DSC）. The major diffraction patterns of 0.5Li2MnO3·0.5LiMn0.5Ni0.5O2 powder calcinated at 720℃ for 15 h are indexed to the hexagonal structure with a space group of R3m, and the clear splits of doublets at （006）/（102） and （108）/（110） indicate that the sample adopts a well-layered structure. FESEM images show that the size of the agglomerated particles of the sample ranges from 100 to 300 nm.</abstract><cop>Springer Berlin Heidelberg</cop><pub>University of Science and Technology Beijing</pub><doi>10.1007/s12613-012-0639-6</doi><tpages>7</tpages></addata></record>
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identifier ISSN: 1674-4799
ispartof International journal of minerals, metallurgy and materials, 2012-09, Vol.19 (9), p.856-862
issn 1674-4799
1869-103X
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source Springer Nature
subjects Calorimetry
Ceramics
Characterization and Evaluation of Materials
Chemical synthesis
Chemistry and Materials Science
Composites
Corrosion and Coatings
Decomposition reactions
Diffraction patterns
Emission analysis
FESEM
Field emission microscopy
Fourier transforms
Glass
Heating
Infrared spectroscopy
Lithium
Manganese
Materials Science
Metallic Materials
Natural Materials
Precursors
Reaction mechanisms
Solid state
Surfaces and Interfaces
Thermogravimetric analysis
Thin Films
Tribology
X-ray diffraction
X-射线衍射
低热固相反应
傅里叶变换红外光谱
前驱物
反应机制
场发射扫描电子显微镜
差示扫描量热法
title Reaction mechanisms for 0.5Li2MnO3·0.5LiMn0.5Ni0.5O2 precursor prepared by low-heating solid state reaction
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