Innovative Fast‐Charging Protocol Incorporating Proactive Lithium‐Plating Suppression Pulses for Lithium‐Ion Batteries: Protocol Design, Validation, and Post‐Mortem Analysis

Abstract Conventional fast‐charging using a high constant current can ultimately accelerate uncontrolled Li plating on the graphite anode, resulting in degradation and poor cycle life of Li‐ion batteries (LIBs). Therefore, identifying suitable fast‐charging methods for LIBs is beneficial for the widespread use of electric vehicles (EVs). Herein, an innovative fast‐charging protocol, designed by combining an active control pulse (ACP) with a multi‐step fast‐charging method (M‐ACP), is proposed to mitigate issues related to Li plating and byproduct formation on the graphite anode during fast‐charging. Because M‐ACP not only reduces charging time but also actively prevents Li plating on the graphite anode surface, the 60 Ah pouch cell used in EVs that employ the M‐ACP protocol exhibits an extended lifetime with no capacity fading over 2000 cycles. The degradation behavior of the negative el…