Research Progress of Electrolyte for Fast Charging Lithium-Ion Batteries
Improving the rapid charging capability of lithium-ion batteries is an important development direction of battery.Fast charging battery should have excellent Li+ diffusion ability,and its development needs to select materials in view of positive and negative electrode,and the influence of electrolyte also needs to be considered.Based on the literature,the methods for developing fast charging batteries were summarized from multiple aspects,including improving the diffusion performance of electrolyte,reducing the desolvation barrier and improving the performance of solid electrolyte interface(SEI)film.Low melting point solutions,high solute concentration and high ion migration number can improve the diffusion performance of electrolyte to enhance fast charging performance of battery.Selecting electrolyte with low solvation binding energy can improve the fast charging performance of the battery.The reasonable choice of electrolyte solvent,the change of solute salt concentration and the addition of electrolyte additives can improve the properties of the negative SEI membrane to enhance the fast charging performance of the battery.The development and innovation of electrolyte are key elements to improve the performance of fast charging batteries.
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