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Characterization of Na-substituted LiNi1/3Co1/3Mn1/3O2 cathode materials for lithium-ion battery

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Abstract

Highly crystalline layered Li1−xNaxNi1/3Co1/3Mn1/3O2 (x = 0, 0.001, 0.01, 0.03, 0.05) materials are synthesized by molten salts method and characterized by scanning electron microscopy, inductively coupled plasma (ICP), X-ray diffraction, Rietveld refinement, and electrochemical measurement, respectively. ICP, SEM, and EDS results show that Na ions are incorporated in LiNi1/3Co1/3Mn1/3O2. Rietveld refinement results show that suitable Na substitution leads to stable layered structure by full Na occupying in Li layer and further attributes to low cation mixing. Electrochemical studies demonstrate that the Na-substituted LiNi1/3Co1/3Mn1/3O2 shows improved rate capability and cycling performance compared to that of pure LiNi1/3Co1/3Mn1/3O2.

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Acknowledgments

The authors gratefully acknowledge the financial support of the Scientific Research Foundation for the Returned Overseas Chinese Scholars of State Education Ministry (no. [2011]1139), the Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation (no. 2013CL07), Changsha University of Science & Technology, P. R. China, the National Natural Science Foundation of China (contract nos. 51304031).

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Correspondence to Zhaoyong Chen.

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Chen, Z., Xie, T., Li, L. et al. Characterization of Na-substituted LiNi1/3Co1/3Mn1/3O2 cathode materials for lithium-ion battery. Ionics 20, 629–634 (2014). https://doi.org/10.1007/s11581-013-1022-y

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  • DOI: https://doi.org/10.1007/s11581-013-1022-y

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