Understanding charge acceptance limitations during extreme fast-charging of Li-ion batteries

Extreme fast charging in lithium-ion batteries is limited by their poor charge acceptance at high C-rates. In this work, we use overpotential component analysis to decouple ohmic, kinetic and transport related voltage losses during fast charging. The concentration gradients developed as a result of fast charging are identified as the primary culprit in poor charge acceptance, so we study carbonate electrolytes that utilize acetonitrile, a low viscosity, high dielectric liquid, as a co-solvent to