Sulochana, A. and Thirunakaran, R. and Sivashanmugam, A. and Gopukumar, S. and Yamaki, J.I. (2008) Sol-Gel Synthesis of 5 V LiCuxMn2−xO4 as a Cathode Material for Lithium Rechargeable Batteries. Journal of the Electrochemical Society, 155 (3). A206-A210. ISSN 0013-4651

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Spinel LiCuxMn2−xO4 0.025 x 0.1 has been synthesized using oxalic acid as the chelating agent using a sol-gel method to obtain submicrometer-sized particles, good surface morphology, homogeneity, agglomeration, and high crystallinity involving short heating time. X-ray diffraction XRD, scanning electron microscopy SEM, Fourier transform infrared spectroscopy, and thermogravimetric and differential thermal analysis were carried out for the physical characterization of the synthesized powder. The XRD patterns of LiCuxMn2−xO4 show the single-phase spinel product, which is in good agreement with the JCPDS card 35-782. SEM images show that the particles, on the average, are of 50 nm in size and are present as agglomerated clusters at all dopant levels. Electrochemical cycling studies of the compound were carried out between 3 and 5 V to understand the redox behavior of Cu2+ ions. The charge–discharge cycling studies of spinel material with Cu stoichiometry of x = 0.1 calcined at 850°C exhibit an initial discharge capacity of 130 mAh g−1 and stabilized at 120 mAh g−1.

Item Type: Article
Subjects: Lithium batteries
Electrochemical Power Sources
Depositing User: ttbdu cecri
Date Deposited: 19 Jan 2012 09:10
Last Modified: 19 Jan 2012 09:10

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