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

Zhi Yong Yu; Yun Jiang Cui; Han Xing Liu

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

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 347-353Synthesis and Electrochemical Properties of...

Synthesis and Electrochemical Properties of LiNi_0.5Mn_0.5O₂ Cathode Materials by a Carbonate Co-Precipitation Method

Abstract:

The layered LiNi_0.5Mn_0.5O₂ used as a cathode material for lithium-ion batteries was synthesized from precursor Ni_0.5Mn_0.5CO₃ prepared via a carbonate co-precipitation method. The precursor Ni_0.5Mn_0.5CO₃ was synthesized by the addition of KHCO₃ to an aqueous solution of Ni, Mn sulphates. The powder LiNi_0.5Mn_0.5O₂ was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Spherical LiNi_0.5Mn_0.5O₂ with well development layered structure was obtained by the carbonate co-precipitation method. The LiNi_0.5Mn_0.5O₂ samples adopted the α-NaFeO₂ structure with a space group R-3m. Galvanostatic charge-discharge behavior of the LiNi_0.5Mn_0.5O₂ 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.

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Advanced Materials Research (Volumes 347-353)

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3497-3500

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.347-353.3497

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Online since:

October 2011

Authors:

Zhi Yong Yu, Yun Jiang Cui, Han Xing Liu

Keywords:

Cathode Material, Co-Precipitation Method, LiNi_0.5Mn_0.5O₂, Lithium-Ion Battery

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