| abstract |
The present application relates to an electrolytic solution and an electrochemical device containing the electrolytic solution, the electrolytic solution comprising a fluorinated cyclic carbonate, a polynitrile compound having an ether bond, and a fluorinated ether, wherein the fluorinated ether is selected from the group consisting of The compound represented by the formula [2], [3], [4] or [5], based on the total weight of the electrolyte, the weight percent C f of the fluorinated cyclic carbonate is greater than the polynitrile compound having an ether bond The weight percent C n . The electrolyte of the present application can control the expansion of the electrochemical device, so that the electrochemical device has excellent cycle, storage and/or float performance. |