A facile strategy to upgrade electrochemical performances of LiEuTiO4 by surface modification derived from pyrolysis of urea
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A facile strategy was proposed to improve electrochemical performances of LiEuTiO4 by surface modification via pyrolysis of urea at a rather low temperature of 400 °C in N2 atmosphere. The modified LiEuTiO4 exhibited excellent electrochemical performances, including high capacity (166.3 mA h g−1 at 100 mA g−1 at 1st cycle), high rate capability (129.4 mA h g−1 at 1600 mA g−1), and long cyclic stability (149.8 mA h g−1 after 650 cycles at 500 mA g−1). The effects of surface modification on structure and electrochemical performances were extensively studied. SEM and TEM results indicated the pyrolysis of urea surface modification which successfully lead to the formation of a nitrogen–carbon co-existed coating layer. XPS analysis confirmed the presence of N-doped carbon and TiN, which were attributed to remarkable reduction of the polarization and enhancement of the conductivity of LiEuTiO4.
KeywordsLithium-ion battery Anode material Rare earth Titanium-based material surface modification
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The authors declare that they have no conflict of interest.
- 8.Zhang B, Liu Y, Huang Z, Oh S, Yu Y, Mai Y-W, Kim J-K (2012) Urchin-like Li4Ti5O12–carbon nanofiber composites for high rate performance anodes in Li-ion batteries. J Mater Chem 22(24)Google Scholar