Synthesis, structural, magnetic and electrochemical properties ofLiNi1/3Mn1/3Co1/3O2prepared by a sol-gel method using table sugar aschelating agent - Tout INSP Accéder directement au contenu
Article Dans Une Revue Electrochimica Acta Année : 2013

Synthesis, structural, magnetic and electrochemical properties ofLiNi1/3Mn1/3Co1/3O2prepared by a sol-gel method using table sugar aschelating agent

Résumé

tTable sugar (sucrose) was used as a new and cheap chelating agent to prepare LiNi1/3Mn1/3Co1/3O2. X-ray diffraction (XRD) shows that the powder adopts the -NaFeO2layered structure with space groupR3m. The high value of c/a above 4.97 indicates a well-ordered rhombohedral lattice. The refined degreeof cationic mixing of 2.4% remains fixed upon cycling. The fatigue of the material used as a positiveelectrode of a Li-cell has been investigated by scanning and transmission electron microscopy (SEM andTEM) as well as the magnetic measurements in the initial, charged and discharged state at low C/10 rateover the 10th first cycles. Small cracks are observed after cycling, despite the low C-rate and the voltagerange limited to 3.0-4.2 V in which only the Ni is electrochemically active. This fatigue, however, hasno sizeable impact on the capacity: the initial capacity ≈150 mAh g−1was retained at the 10th cycle

Dates et versions

hal-00880658 , version 1 (06-11-2013)

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Nilüfer Kiziltas Yavuza, Markus Herklotz, Ahmed M. Hashem, Hanaa M. Abuzeid, Björn Schwarz, et al.. Synthesis, structural, magnetic and electrochemical properties ofLiNi1/3Mn1/3Co1/3O2prepared by a sol-gel method using table sugar aschelating agent. Electrochimica Acta, 2013, 113, pp.313-321. ⟨10.1016/j.electacta.2013.09.065⟩. ⟨hal-00880658⟩
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