Fast Charging Li-Ion Batteries for a New Era of Electric Vehicles

Abstract

Summary: Extreme fast charge (10 min to reach 80% state of charge) is one of the key limiting parameters preventing the widespread adoption of battery-based electric vehicles into the transportation sector. Many recent simulations and experimental-based studies have been recently published in this area with a specific focus on why extreme fast charge is challenging. These studies identified that cathode particle cracking and electrolyte transport limitation are the key barriers that have caused the well-known safety and stability problems. Interestingly, there have been very few studies that have demonstrated significant improvements toward a 10-min charge under high energy density conditions. Several strategies pertaining to electrolyte modifications (concentrated electrolyte and low viscosity additives) along with adaptive fast charging are highlighted and suggested.