▎ 摘　　要

NOVELTY - A battery electrolyte solution comprises an electrolyte salt and a non-aqueous organic solvent. The non-aqueous organic solvent contains 10-90 %mass sulfonamide-based organic solvent (I) and/or disulfonamide-based the organic solvent (II). USE - Battery electrolyte solution used for secondary battery e.g. lithium secondary battery, potassium secondary battery, sodium secondary battery, magnesium secondary battery, zinc secondary battery or aluminum secondary battery, used for terminal (all claimed). Uses include but are not limited to mobile phone, tablet computer, mobile power supply, portable machine, notebook computer, digital camera, wearable or movable electronic equipment, unmanned aerial vehicle and automobile applications. ADVANTAGE - The battery electrolyte solution has high coulomb efficiency and cycle performance, and improved safety. DETAILED DESCRIPTION - A battery electrolyte solution comprises an electrolyte salt and a non-aqueous organic solvent. The non-aqueous organic solvent contains 10-90 %mass sulfonamide-based organic solvent of formula: R1-S(=O)x-N(-R3)-R2 (I), and/or disulfonamide-based organic solvent of formula: R1-S(=O)x-N(-R3)-S(=O)y-R4 (II). R1,R4 = fluoroalkyl, fluoroalkoxy, fluoroalkenyl, fluoroalkenyl, fluoroaryl or fluoroaryloxy; R2,R3 = alkyl, alkoxy, alkenyl, alkenyloxy, aryl or aryloxy;and x,y = 1 or 2. (i) The number of carbon atoms in the fluoroalkyl group, fluoroalkoxy group, alkyl group and alkoxy group is 1-20; (ii) The number of carbon atoms in the fluoroalkenyl group, fluoroalkenyloxy group, alkenyl group and alkenyloxy group is 2-10; and (iii) The number of carbon atoms in the fluoroaryl group, fluoroaryloxy group, aryl group and aryloxy group is 6-20. An INDEPENDENT CLAIM is included for secondary battery, which comprises a positive electrode (101), a negative electrode (102), a diaphragm (104) and an electrolyte (103) between the positive electrode and the negative electrode. The electrolyte comprises the battery electrolyte solution. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the secondary battery. Positive electrode (101) Negative electrode (102) Electrolyte (103) Diaphragm (104)