A Novel Synthesis Process and Characterization of Well-Crystallized Li1+xMn2-xO4 Spinels

T. Takada; H. Enoki; H. Hayakawa; E. Akiba

A Novel Synthesis Process and Characterization of Well-Crystallized Li_1+xMn_2-xO₄ Spinels

T. Takada, H. Enoki, H. Hayakawa, E. Akiba

Hydrogen Utilization Engineering

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

Abstract

Well-crystallized lithium manganospinels Li_1+xMn_2-xO₄(0≤x≤0.333) were prepared from the stoichiometric mixture of LiOAc and Mn(NO₃)₂. The crystallites appear to be single crystals with a size of 0.1-2.0μm in the SEM micrographs. The lattice parameter and manganese occupancy at 16d sites in the space group Fd3̄m were found to be sensitive to both the synthesis temperature and the composition of the spinels (Li/Mn ratio), as a result of the variation in manganese valency. Samples with a lower x (x≤0.125) show good electrode performance for the cell Li/Li_1+xMn_2-xO₄ in the 4V region, whereas Li₄Mn₅O₁₂ (x=0.333) spinels show good cyclability with a rechargeable capacity of over 100mAh/g in the 3V region.

Original language	English
Pages (from-to)	297-302
Number of pages	6
Journal	Key Engineering Materials
Volume	157-158
Publication status	Published - Dec 1 1999

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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title = "A Novel Synthesis Process and Characterization of Well-Crystallized Li1+xMn2-xO4 Spinels",

abstract = "Well-crystallized lithium manganospinels Li1+xMn2-xO4(0≤x≤0.333) were prepared from the stoichiometric mixture of LiOAc and Mn(NO3)2. The crystallites appear to be single crystals with a size of 0.1-2.0μm in the SEM micrographs. The lattice parameter and manganese occupancy at 16d sites in the space group Fd{\=3}m were found to be sensitive to both the synthesis temperature and the composition of the spinels (Li/Mn ratio), as a result of the variation in manganese valency. Samples with a lower x (x≤0.125) show good electrode performance for the cell Li/Li1+xMn2-xO4 in the 4V region, whereas Li4Mn5O12 (x=0.333) spinels show good cyclability with a rechargeable capacity of over 100mAh/g in the 3V region.",

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TY - JOUR

T1 - A Novel Synthesis Process and Characterization of Well-Crystallized Li1+xMn2-xO4 Spinels

AU - Takada, T.

AU - Enoki, H.

AU - Hayakawa, H.

AU - Akiba, E.

PY - 1999/12/1

Y1 - 1999/12/1

N2 - Well-crystallized lithium manganospinels Li1+xMn2-xO4(0≤x≤0.333) were prepared from the stoichiometric mixture of LiOAc and Mn(NO3)2. The crystallites appear to be single crystals with a size of 0.1-2.0μm in the SEM micrographs. The lattice parameter and manganese occupancy at 16d sites in the space group Fd3̄m were found to be sensitive to both the synthesis temperature and the composition of the spinels (Li/Mn ratio), as a result of the variation in manganese valency. Samples with a lower x (x≤0.125) show good electrode performance for the cell Li/Li1+xMn2-xO4 in the 4V region, whereas Li4Mn5O12 (x=0.333) spinels show good cyclability with a rechargeable capacity of over 100mAh/g in the 3V region.

AB - Well-crystallized lithium manganospinels Li1+xMn2-xO4(0≤x≤0.333) were prepared from the stoichiometric mixture of LiOAc and Mn(NO3)2. The crystallites appear to be single crystals with a size of 0.1-2.0μm in the SEM micrographs. The lattice parameter and manganese occupancy at 16d sites in the space group Fd3̄m were found to be sensitive to both the synthesis temperature and the composition of the spinels (Li/Mn ratio), as a result of the variation in manganese valency. Samples with a lower x (x≤0.125) show good electrode performance for the cell Li/Li1+xMn2-xO4 in the 4V region, whereas Li4Mn5O12 (x=0.333) spinels show good cyclability with a rechargeable capacity of over 100mAh/g in the 3V region.

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