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LiNi0.7Co0.15Mn0.15O2 microspheres as high-performance cathode materials for lithium-ion batteries

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Abstract

Advanced uniform LiNi0.7Co0.15Mn0.15O2 microspheres were successfully synthesized and examined as cathode materials for lithium-ion batteries. The structure, morphology, and electrochemical performance of LiNi0.7Co0.15Mn0.15O2 calcined at different temperatures ranging from 650 to 900 °C were systematically investigated. The XRD results show that the material has a well-ordered layered structure with small amount of cation mixing. A distinct spherical morphology of the obtained powders prepared at different temperatures can be seen from the SEM images. The as-synthesized LiNi0.7Co0.15Mn0.15O2 powders have a very high-tap density of about 2.37 g·cm−3. Among all the samples, the sample calcined at 750 °C exhibits the best electrochemical performance with an initial discharge capacity of 185.2 mAh·g−1 (3.0–4.3 V, 0.2C rate) and capacity retention >94.77 % after 50 cycles. Moreover, this material shows high-specific capacity and good cycling stability. The LiNi0.7Co0.15Mn0.15O2 microspheres with high-specific capacity and high-tap density are promising to use as cathode materials for next-generation high-energy-density lithium-ion batteries.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 21001117) and the National Science Foundation for Post-Doctoral Scientists of China (No. 2011M501286).

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Authors and Affiliations

  1. Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China

    Zhou-Guang Lu & Ke-Chao Zhou

  2. College of Chemical & Chemical Engineering, Central South University, Changsha, 410083, China

    Zhou-Guang Lu, Xin-Xin Tan & You-Gen Tang

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  1. Zhou-Guang Lu
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  2. Xin-Xin Tan
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Correspondence to Zhou-Guang Lu.

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Lu, ZG., Tan, XX., Tang, YG. et al. LiNi0.7Co0.15Mn0.15O2 microspheres as high-performance cathode materials for lithium-ion batteries. Rare Met. 33, 608–614 (2014). https://doi.org/10.1007/s12598-013-0097-y

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  • DOI: https://doi.org/10.1007/s12598-013-0097-y

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