Non-aqueous electrolyte and battery

A non-aqueous electrolyte, comprising a solvent, an electrolytic salt, a first additive, and a third additive, wherein the first additive is one or more selected from a compound of formula (I):

• A
• -
• D
• -
• B
• -
• E
• -
• C
• ,
• wherein
• :
• (
• I
• )
• A, B and C each are independently selected from a group containing a cyclic carbonate group, a cyclic sulfate group, a cyclic sulfite group, a cyclic sulfonate group, a cyclic sulfone group, a cyclic sulfoxide group, a cyclic carboxylate group or a cyclic anhydride group;
• and
• D and E each are independently selected from a single bond, or a group containing hydrocarbylene group, an ether bond, a sulfur-oxygen double bond, or a carbon-oxygen double bond,
• wherein the first additive is added at an amount of 0.01% to 5.0% based on a total mass of 100% of the non-aqueous electrolyte,
• wherein the third additive is one or more selected from LiPO2F2, LiODFB, LiDFOP, LiBOB, LiBF4, LiFSI or LiTFSI,
• wherein the third additive is added at an amount of 0.01% to 4% based on the total mass of 100% of the non-aqueous electrolyte, and
• wherein the non-aqueous electrolyte is of a methanol content of 200 ppm or less,
• wherein the first additive is one or more selected from the following compounds