Abstract
Spinel LiMnTiO4 as the cathode material for Li-ion batteries has been synthesized by a sol–gel method. The LiMnTiO4 cathode possesses two voltage plateaus, and exhibits an initial discharge capacity of 203.3 mAh g−1. After 47 charge–discharge cycles, the capacity retention of the LiMnTiO4 cathode is 77.5 %, which is much higher than that of LiMn2O4 (47.9 %). Ti substitution can successfully suppress the formation of tetragonal phase during cycling and hence increase the structural stability; however, it decreases the discharge capacity. Multi-walled carbon nanotubes (MWCNTs) were mechanically milled with the pristine LiMnTiO4. The as-prepared LiMnTiO4/MWCNTs composite electrode exhibits significantly improved electrochemical properties including rate capability and cycling stability, as compared with LiMnTiO4.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (51404142). The support from the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the natural science foundation of Jiangsu Province (BK20140936) and China Postdoctoral Science Foundation (2012M521064) were also acknowledged.
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Zhang, X., Yang, M., Zhao, X. et al. The spinel phase LiMnTiO4 as a potential cathode for rechargeable lithium ion batteries. J Mater Sci: Mater Electron 26, 6366–6372 (2015). https://doi.org/10.1007/s10854-015-3224-8
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DOI: https://doi.org/10.1007/s10854-015-3224-8