Electrochemical device and electronic device including same

An electrochemical device, comprising:

• a cathode, an anode and an electrolytic solution;
• wherein
• the anode comprises a carbon material and hydroxyalkyl methylcellulose, the carbon material having at least one of natural graphite or artificial graphite, and the hydroxyalkyl methylcellulose comprises one or more selected from the group consisting of hydroxyalkyl methylcellulose sodium and hydroxyalkyl methylcellulose lithium, and an alkyl group in the hydroxyalkyl methylcellulose has 1-8 carbon atoms;
• the electrolytic solution comprises propionate, wherein the propionate is a compound of Formula 1:
• wherein,
• R1 is ethyl or haloethyl, and
• R2 is alkyl or haloalkyl having 1-6 carbon atoms;
• the electrolytic solution further comprises an additive;
• a content of the additive is about 0.01% to about 15% based on a total weight of the electrolytic solution;
• the additive comprises a fluorocarbonate;
• and the fluorocarbonate comprises fluoroethylene carbonate;
• and
• the additive further comprises a compound having 2-4 cyano groups, and the compound having 2-4 cyano groups comprises at least one of adiponitrile or 1,2,3-tris(2-cyanoethoxy) propane.