Journal
SOLID STATE IONICS
Volume 320, Issue -, Pages 113-117Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2018.02.035
Keywords
LL4Ti5O12 anode; Co2+-ion doping; N-doped carbon; Li-storage performance
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Funding
- Natural Science Foundation of Shanxi Province [2014011031-2]
- Science and Technology Research Project of Datong City [2015020]
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In this work, the Co2+-ion doping and N-doped carbon coating are adopted to improve the intrinsic and apparent electronic conductivities of Li4Ti5O12. This co-modified composite is fabricated through a ball-milling process followed by one-step solid-state reaction. XRD results demonstrate that the doped Co2+ does not destroy the spinel-type structure and it has successfully doped into the crystal structure of Li4Ti5O12. TEM images reveal that the surface of Li4Ti5O12 particle is coated by a thin N-doped carbon layer with a thickness of 3-4 nm. Benefiting from the improved conductivity, the obtained composite displays an excellent rate capability and a stable cyclic property. Thus, the Co2+-ion doped and N-doped carbon-coated Li4Ti5O12 anode has great potential for the application of lithium-ion batteries.
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