Electrochemical characterization of commercial lithium manganese oxide powders

Electrochemical characterization of commercial lithium manganese oxide powders

Five commercial lithium manganese oxide powders have been studied. The XRD spectra showed all samples to exhibit the spinel structure. The composition and morphology were analyzed by Jaeger–Vetter titration and scanning electron microscopy. The lithium intercalation/de-intercalation characteristics...

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Bibliographic Details
Published in:Solid state ionics Vol. 127; no. 1; pp. 31 - 42
Main Authors: Huang, H., Chen, C.H., Perego, R.C., Kelder, E.M., Chen, L., Schoonman, J., Weydanz, W.J., Nielsen, D.W.
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 2000
Elsevier Science
Subjects:
Applied sciences
Cycleability
Defect structure
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Li–Mn–O powders
Morphology
Spinel structure
Cycleability
Defect structure
Spinel structure
Morphology
Li–Mn–O powders
Scanning electron microscopy
Lithium Oxides
Secondary cell
Electrode material
X ray diffraction
Discharge charge cycle
Surface structure
Spinels
Battery
Manganese Oxides
Commercial form
Specific capacity
Electrical characteristic
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Summary:Five commercial lithium manganese oxide powders have been studied. The XRD spectra showed all samples to exhibit the spinel structure. The composition and morphology were analyzed by Jaeger–Vetter titration and scanning electron microscopy. The lithium intercalation/de-intercalation characteristics and the cycleability have been studied using state-of-the-art cells. The morphology of the particles and crystallites, as well as the defect structure of the spinel, were found to play an important role in the capacity retention during electrochemical cycling. The capacity corresponding to the 4.1 V phase transformation process faded faster than that of the 4.0 V single-phase transition during cycling, which enhanced lower plateau capacity fading and higher voltage polarization. The cycleability at the 3.0 V region has also been studied and indicated that the typical spinel lithium manganese oxide is not suitable to be cycled in the 3.0 V region. Therefore, it will be deleterious to overdischarge the spinel materials.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(99)00057-0