Synthesis and Electrochemical Properties of LiNi0.5Mn0.5O2 Cathode Materials by a Carbonate Co-Precipitation Method

Abstract:

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The layered LiNi0.5Mn0.5O2 used as a cathode material for lithium-ion batteries was synthesized from precursor Ni0.5Mn0.5CO3 prepared via a carbonate co-precipitation method. The precursor Ni0.5Mn0.5CO3 was synthesized by the addition of KHCO3 to an aqueous solution of Ni, Mn sulphates. The powder LiNi0.5Mn0.5O2 was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Spherical LiNi0.5Mn0.5O2 with well development layered structure was obtained by the carbonate co-precipitation method. The LiNi0.5Mn0.5O2 samples adopted the α-NaFeO2 structure with a space group R-3m. Galvanostatic charge-discharge behavior of the LiNi0.5Mn0.5O2 cathodes delivered a initial charge and discharge capacity of 144.4 mAh/g and 140.2 mAh/g, respectively in the voltage range 2.5-4.5V at a discharge rate of 0.02A/g. The capacity showed no dramatic capacity fading during 50 cycles.

Info:

Periodical:

Advanced Materials Research (Volumes 347-353)

Edited by:

Weiguo Pan, Jianxing Ren and Yongguang Li

Pages:

3497-3500

DOI:

10.4028/www.scientific.net/AMR.347-353.3497

Citation:

Z. Y. Yu et al., "Synthesis and Electrochemical Properties of LiNi0.5Mn0.5O2 Cathode Materials by a Carbonate Co-Precipitation Method", Advanced Materials Research, Vols. 347-353, pp. 3497-3500, 2012

Online since:

October 2011

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$35.00

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