Electrochemical performance of solid sphere spinel LiMn2O 4 with high tap density synthesized by porous spherical Mn 3O4

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DOIResolve DOI: http://doi.org/10.1016/j.electacta.2014.01.030
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TypeArticle
Journal titleElectrochimica Acta
ISSN0013-4686
Volume123
Pages254259; # of pages: 6
SubjectBeta-hydroxy-manganese; High tap-density; Lithium manganese oxide; Solid spheres; Cathodes; Cyclic voltammetry; Electrochemical impedance spectroscopy; Lithium alloys; Lithium batteries; Lithium compounds; Manganese; Scanning electron microscopy; X ray diffraction; Spheres
AbstractSolid sphere spinel LiMn2O4 materials are synthesized from porous spherical Mn3O4 particles with LiOH·H2O via a high temperature solid-phase reaction. Porous spherical Mn3O4 particles, composed of aggregated crystallites, can be obtained from as-prepared spherical β-MnOOH. The solid sphere spinel LiMn2O4 particles have a high tap-density of 2.67 g·cm-3 and are well-distributed with sizes ranging from 7-9 μm. The as-prepared β-MnOOH, Mn3O4 and LiMn2O4 are characterized by X-ray diffraction and scanning electron microscopy. As cathode materials, solid sphere spinel LiMn2O4, exhibits excellent cycling performance and rate capability for lithium-ion batteries. The initial discharge capacities are 127.1, 118.1, 106.3 and 87 mAh·g-1 at 0.2, 1, 5 and 10 C, respectively. At 5 C the discharge capacity retention rate can be maintained at 95% after 200 cycles. Cyclic voltammetry and electrochemical impedance spectroscopy confirm the excellent electrochemical performances of the synthesized solid sphere spinel LiMn2O4 materials.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationNational Research Council Canada; Energy, Mining and Environment
Peer reviewedYes
NPARC number21272681
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Record identifier962a270a-413d-445d-a828-ac33924f2f54
Record created2014-12-03
Record modified2016-05-09
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