Surface Modified Natural Graphite for Fast Charging Li-Ion Batteries

Graphite is a widely used anode active material in the vast majority of commercial Li-ion batteries (LIBs), but it retards charge due to intrinsically sluggish Li + intercalation, which typically taking the battery’s full charging about three hours. In addition, fast charging of LIBs is hindered by the occurrence of Li metal plating and dendrites growth unless other a stable solid electrolyte interphase (SEI) form. Converting traditional graphite to a fast charging one provides new opportunities for the development and design of better performing batteries. In this presentation, we will report a breakthrough in boosting Li + diffusion kinetics via surface modification of natural graphite for fast charging, which was obtained through a simple, scalable, and inexpensive method. We demonstrate that our surface modified natural graphite yields an unprecedented minute-scale charge speed, high capacity, cycle life and safety without Li plating and dendrites. This development holds significant promise for next-generation LIB. Acknowledgements This research was supported by the National Research Foundation grant funded by the Ministry of Science and ICT (2021M3H4A3A02086211, RS-2023-00217581) of Korea.