Advanced Electrolyte Systems with Sultones Additives for High‐Voltage Lithium Batteries

The new energy market is growing rapidly, lithium batteries (LBs) as the most important source of energy supply in the energy storage and power market, has higher requirements for fast charge and long life, so it is necessary to improve the cell voltage and energy density of LBs. However, LBs with high voltage and high energy density will face serious challenges of electrolyte decomposition and electrode corrosion in high voltage environment. Herein, this review summarizes the effects of a series of sultones as electrolyte additives in high voltage electrolytes. It is found that DTD, ES, 1,3‐PS, PES, PCS, MMDS, BDTD, BDTT, DTDph, ODTO, FPS, VES and other sultones have excellent properties on stabilizing SEI/CEI formation, inhibiting gas production, and good high temperature resistance. The preferential oxidation/reduction of sultones can protect the electrolyte from decomposition, and the uniform and dense SEI/CEI can also promote Li+ transport, protect the electrode from corrosion, prevent the growth of lithium dendrites, and promote the insertion and removal of Li+, so as to improve the cycle life of the high‐voltage battery. This review can provide theoretical support for the design of high voltage and high energy density LBs electrolyte and selection of additives in the future.