Electrolytic solution and lithium metal battery containing the same, battery module, battery pack, and device

An electrolytic solution, comprising a lithium salt, an organic solvent, and an additive, wherein the additive comprises a sultam compound represented by Structural Formula I:

• wherein
• R is selected from substituted or unsubstituted C1 to C10 hydrocarbyls, wherein a substituent is selected from a phenyl, C1 to C6 alkyls, or C1 to C6 alkenyls;
• X is a sulfur atom or a phosphorus atom;
• and
• R1 and R2 each are independently selected from an oxygen atom, a fluorine atom, a chlorine atom, a bromine atom, and substituted or unsubstituted C1 to C10 hydrocarbyls, wherein a substituent contains one or more of elements fluorine, chlorine, bromine, iodine, nitrogen, oxygen, sulfur, silicon, boron, and phosphorus;
• and both R1 and R2 are not oxygen atoms concurrently.