Novel synthesis process and characterization of Li-Mn-O spinels for rechargeable lithium batteries
Conference
·
OSTI ID:20019152
A new process has been developed for the synthesis of well-crystallized Li-Mn-O spinels with a homogeneous composition Li[Li{sub x}Mn{sub 2{minus}x}]O{sub 4} (0.0 {le} x {le} 0.333) using the stoichiometry mixtures of lithium acetate and manganese nitrate as starting materials. The crystal structure of these compounds was studied with Rietveld refinements of the X-ray diffraction profiles. The lattice parameter of the spinels shows a strong dependence on the composition and manganese oxidation state. SEM micrographs indicate that the crystallites appear as single crystals. The size of the crystallites are in the range of 0.1--2{micro}m, depending on the synthesis conditions. Samples with x {le} 0.125 show good electrode performance for the cell Li/Li{sub 1+x}Mn{sub 2{minus}x}O{sub 4} in the 4V region, whereas Li{sub 4}Mn{sub 5}O{sub 12} (x = 0.333) spinels show good cyclability with a rechargeable capacity of over 100 mAh/g in the 3V region.
- Research Organization:
- National Inst. of Materials and Chemical Research, Ibaraki (JP)
- OSTI ID:
- 20019152
- Country of Publication:
- United States
- Language:
- English
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