Structural Regulation and Design of Electrode Materials and Electrolytes for Fast-Charging Lithium-Ion Batteries
Achieving fast charging of lithium-ion batteries is an effective way to promote the popularity of electric vehicles and solve environmental and energy problems.However,the slow kinetics and increased safety risks of conventional lithium-ion battery systems under fast charging conditions severely hinder the practical application of this technology.This paper reviews the latest research progress in the structural regulation and design of electrode materials and electrolytes for fast-charging lithium-ion batteries.First,we systematically introduce the research progress made in recent years within the scope of improving the diffusion rate of Li-ion in electrode materials by structural modulation of electrode materials.The review focused on optimizing the ion/electron conductivity of the materials and shortening the Li-ion transfer path.Then,we systematically introduce the methods to improve the fast charging performance through the regulation and design of electrolytes,in terms of improving the ion conductivity of electrolytes and regulating Li-ion solvation structure and then highlight the acceleration of Li-ion de-solvation process by regulating the lithium salt concentration and Li-ion solvent interactions with the goal of achieving promotion of Li-ion transfer at the phase interface.Finally,the key scientific issues facing fast-charging Li-ion batteries is summarized as well as the future research directions.
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