Electrolyte compositions with fluorinated acyclic esters and fluorinated cyclic carbonates

Disclosed herein is an electrochemical cell comprising an anode, a cathode and an electrolyte composition wherein the anode comprises a combination of at least a carbon material and a silicon material as an anode active material; and the electrolyte composition comprises a solvent, from 0.5 wt.% to 70 wt.%, based on the total weight of the electrolyte, of a fluorinated acyclic carboxylic acid ester compound, from 0.5 wt.% to 10 wt.%, based on the total weight of the electrolyte, of a fluorinated cyclic carbonate compound; and an electrolyte salt. 本文披露了一种电化学电池，其包括阳极、阴极和电解质组合物，其中所述阳极包括作为阳极活性材料的至少碳材料和硅材料的组合；并且所述电解质组合物包含溶剂，基于该电解质的总重量从0.5wt.％至70wt.％的氟化非环状羧酸酯化合物，基于该电解质的总重量从0.5wt.％至10wt.％的氟化环状碳酸酯化合物；以及电解质盐。