▎ 摘　　要

NOVELTY - An electrolyte comprises lithium salt with concentration of 0.1-5 M, and solvent comprising dimethyl sulfoxide. The lithium salt comprises lithium tetrafluoroborate. USE - Electrolyte used in lithium primary battery (claimed). ADVANTAGE - The electrolyte can effectively increase capacity of the primary battery, thereby improving the energy density of the battery due to electrochemical decomposition of solute and solvent in the electrolyte. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for lithium primary battery, which comprises the electrolyte.