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Synthesis of LiNi1/3Co1/3Mn1/3O2 nanoparticles by modified Pechini method and their enhanced rate capability

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Abstract

Layered LiNi1/3Co1/3Mn1/3O2 nanoparticles were prepared by modified Pechini method and used as cathode materials for Li-ion batteries. The pyrolytic behaviors of the foamed precursors were analyzed by use of simultaneous thermogravimetric and differential thermal analysis (TG-DTA). Structure, morphology and electrochemical performance characterization of the samples were investigated by X-ray diffraction (XRD), field emission scanning electron macroscopy(SEM), Brunauer-Emmett-Teller (BET) specific surface area and charge–discharge tests. The results showed that the samples prepared by modified Pechini method caclined at 900 °C for 10 h were indexed to pure LiNi1/3Co1/3Mn1/3O2 with well hexagonal structure. The particle size was in a range of 100–300 nm. The specific surface area was larger than that of the as-obtained sample by Pechini method. Initial discharge capacity of 163.8 mAh/g in the range 2.8–4.4 V (vs. Li/Li+) and at 0.1C for LiNi1/3Co1/3Mn1/3O2 prepared by modified Pechini method was obtained, higher than that of the sample prepared by Pechini method (143.5 mAh/g). Moreover, the comparison of electrochemical results at different current rates indicated that the sample prepared by modified Pechini method exhibited improved rate capability.

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Acknowledgments

This work was supported by the Key Scientific and Technological Project of Henan Province of China (No. 092102310113).

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, 471022, China

    Xian-Ming Liu & Bao-Ming Ji

  2. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China

    Wen-Liang Gao

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  1. Xian-Ming Liu
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Liu, XM., Gao, WL. & Ji, BM. Synthesis of LiNi1/3Co1/3Mn1/3O2 nanoparticles by modified Pechini method and their enhanced rate capability. J Sol-Gel Sci Technol 61, 56–61 (2012). https://doi.org/10.1007/s10971-011-2590-9

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  • DOI: https://doi.org/10.1007/s10971-011-2590-9

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