Abstract
Li-rich layered Li1.2Ni0.2Mn0.6O2 has been surface modified by nickel–manganese composite oxide (Ni0.5Mn1.5O x ) to serve as a novel cathode material with novel layered spinel structure for lithium-ion battery. The as-prepared Li1.2Ni0.2Mn0.6O2 before and after surface modification by Ni0.5Mn1.5O x as well as simply blended Li1.2Ni0.2Mn0.6O2 with spinel LiNi0.5Mn1.5O4, have been characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electronic microscopy, and differential scanning calorimetry. Electrochemical studies indicate that the Ni0.5Mn1.5O x surface modified Li1.2Ni0.2Mn0.6O2 with peculiar layered spinel character dramatically represented increased discharge capacity, improved cycling stability as well as excellent rate capability at high-voltage even up to 5.0 V.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (nos. 21103090, 201173120), the Fundamental Research Funds for the Central Universities (no. NS2012109) and Natural Science Foundation of Jiangsu Province (no. BK2011030).
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Guan, X., Ding, B., Liu, X. et al. Enhancing the electrochemical performance of Li1.2Ni0.2Mn0.6O2 by surface modification with nickel–manganese composite oxide. J Solid State Electrochem 17, 2087–2093 (2013). https://doi.org/10.1007/s10008-013-2070-y
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DOI: https://doi.org/10.1007/s10008-013-2070-y