This research utilizes anatase TiO2 incorporated with lithium salt via a simple wet physical method to surface-modified the commercial graphite to form the lithium titanate/graphite composite coated with an amorphous carbon layer on its surface (the double core-shell structure) to enhance its surface conductivity. This double core-shell structure provides a stable specific capacity about 280 mAh/g under the high current density, 2.25 A/g with 15% capacity retention decay. Its intercalation potential is below 1 V that is much lower than that of 1.55 V, the intercalation potential of spinel Li4Ti5O12, to make higher power and energy density for a full cell.
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This research project is funded by the Ministry of Science and Technology, Taiwan with the project number: MOST 108-2221-E-110-075.
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Hu, LH. Commercial carbon anode material surface-modified by spinel lithium titanate for fast lithium-ion interaction. MRS Communications 10, 141–146 (2020). https://doi.org/10.1557/mrc.2019.164