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Synthesis and electrochemical properties of yttrium-doped LiMn0.98Y0.02O2 for lithium secondary batteries

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Abstract

Yttrium-doped lithium manganese oxide (LiMn0.98Y0.02O2) was prepared by ion exchange of lithium for sodium in NaMn0.98Y0.02O2 precursors obtained by using rheological phase reaction method. This material had small particle size, which was composed of grain size of about 100 nm. Especially, LiMn0.98Y0.02O2 delivered the initial discharge capacity of about 191 mA h g−1 at room temperature when cycled between 2.0 and 4.4 V vs Li/Li+. Moreover, it showed an excellent cycling behavior, its specific capacity remained above 173 mA h g−1 after 20 cycles, and the material did not transform into spinel structure during the electrochemical cycling according to the cyclic voltammograms and X-ray powder diffraction. The electrochemical results revealed that the doping of Y3+ improved the performance of LiMnO2 considerably.

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Acknowledgement

This work was supported by the National Natural Science Foundation of China (No.20071026)

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Authors and Affiliations

  1. Department of Chemistry, Wuhan University, Wuhan, 430072, People’s Republic of China

    H. X. Zong, C. J. Cong, L. N. Wang, G. H. Guo, Q. Y. Liu & K. L. Zhang

  2. Centre of Nanoscience and Nanotechnology Research, Wuhan University, Wuhan, 430072, People’s Republic of China

    K. L. Zhang

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  1. H. X. Zong
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  2. C. J. Cong
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  3. L. N. Wang
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  4. G. H. Guo
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Correspondence to K. L. Zhang.

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Zong, H.X., Cong, C.J., Wang, L.N. et al. Synthesis and electrochemical properties of yttrium-doped LiMn0.98Y0.02O2 for lithium secondary batteries. J Solid State Electrochem 11, 195–200 (2007). https://doi.org/10.1007/s10008-005-0087-6

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  • DOI: https://doi.org/10.1007/s10008-005-0087-6

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