Electrolytic solution and electrochemical device

An electrochemical device, comprising a cathode, an anode, a separator disposed between the cathode and the anode, and an electrolytic solution, wherein the electrolytic solution comprises a carbonate compound having a silicon-containing functional group, wherein the carbonate compound having a silicon-containing functional group comprises at least one compound selected from the group consisting of a compound of Formula (II-A) and a compound of Formula (II-C):

• wherein R21, R22, R29, and R′29 are each independently selected from a substituted or unsubstituted C1-C10 alkylene group, a substituted or unsubstituted C2-C10 alkenyl group, a substituted or unsubstituted C6-C10 arylene group or a substituted or unsubstituted C3-C10 cycloalkyl group, and when substituted, the substituent is at least one of halogen, C1-C6 alkyl, C2-C6 alkenyl, and cyano;
• wherein r, s, α′, and β′ are each independently selected from 0 or 1, and r and s are not 0 simultaneously;
• wherein R23, R24, R′2a, R′2b, R′2c, R′2d, R′2e, and R′2f are each independently selected from hydrogen, fluorine, a substituted or unsubstituted C1-C10 alkyl group, a substituted or unsubstituted C2-C10 alkenyl group, a substituted or unsubstituted C6-C10 aryl group or a substituted or unsubstituted C3-C10 cycloalkyl group, and when substituted, the substituent is at least one of halogen, C1-C6 alkyl, C2-C6 alkenyl, and cyano;
• wherein γ′, and δ′ are each independently selected from an integer from 0 to 3;
• wherein number of Si in the compound of Formula (II-C) is 1 to 6;
• wherein R′2c, R′2d and R′2a are not hydrogen simultaneously;
• and
• R′2e, R′2f and R′2b are not hydrogen simultaneously.