Synthesis of Modified Graphite with High Crystalline Na-LTO by Simple Doping Method.

Abstract

Abstract Graphite doped with Na-Li4Ti5O12 (Na-LTO) for lithium-ion batteries with stable rateability were prepared in a short time by simple grounding which followed with the short calcination time. High crystalline Na-LTO improved the diffusivity of the Li-ion kinetics and stability. Therefore, Graphite/Na-LTO (G-NaLTO) was compared with the pure graphite to find out the differences in terms of XRD pattern and electrochemical performance. XRD analysis showed there was no significant differences pattern from G-NaLTO with commercial graphite. In terms of electrochemical performance, G-NaLTO which was doped by 1 wt% Na-LTO, presented a high initial charge capacity 356.69 mAh g−1 at 0.1C and stable discharge rate-capability at 0.2C and 1C were 264.64 mAh g−1 and 220.65 mAh g−1, respectively, after 15 cycles. G-NaLTO with a composition of 3 wt% Na-LTO shows a decreasing electrochemical performance so it can be concluded that the addition of 1 wt% LTO by the doping method is the most optimal.