Influence of RF thermal plasma treatment and the post treatment of graphite powders on the anode properties for lithium rechargeable battery.

Abstract

MCMB powders were treated in RF thermal plasmas under reduced pressures. The plasma-treated powders were characterized by XRD, SEM, TEM, BET surface area, chemical composition and Raman spectroscopy. Electrochemical measurement were performed in 1M LiClO₄/(EC+DEC) at the current density of 0.25mA/cm². The plasma treatment modified the surface morphology, structure, and chemical composition and led to the disordered surface on the MCMB particles. Plasma modification gave rise to an improvement in electrochemical performance such as discharge capacity and first charge/discharge efficiency. The plasma-treated powder without air exposure showed the further improvement in first charge/discharge efficiency.