Abstract: A lithium secondary battery electrolyte for reducing internal resistance of a battery and a lithium secondary battery. The electrolyte comprises a non-aqueous organic solvent, a lithium salt and an additive. The additive comprises a sulfimide compound. The sulfimide compound can significantly reduce the internal resistance of a battery. The low temperature cycle, large rate normal temperature cycle, high temperature cycle, and expansion after high temperature storage have been significantly improved.

Abstract: The present invention relates to a lithium secondary battery electrolyte and a lithium secondary battery thereof. The lithium secondary battery electrolyte comprises an organic solvent, a conductive lithium salt, an ionic liquid, and an additive. The ionic liquid is selected from at least one of 1-ethyl-3-methylimidazole tetrafluoroborate and dipyrrolidinyl ammonium tetrafluoroborate. For the electrolyte, by adding the ionic liquids 1-ethyl-3-methylimidazole tetrafluoroborate and dipyrrolidinyl ammonium tetrafluoroborate to use in combination with additives lithium difluorophosphate, methyl 2-propynylcarbonate, methyl allyl carbonate, and 1,3 propane sultone, the high temperature, normal temperature and low temperature cycle performance of the electrolyte can be improved.

Abstract: The present invention relates to a slurry for a positive electrode of a secondary lithium battery, a preparation method for the same, and an application thereof. The slurry for a positive electrode of a lithium secondary battery comprises an active material of the positive electrode, a conductive agent, a binding agent, and an organic solvent. The organic solvent has a structure as shown by formula (I), with R3 being a C1-C6 alkyl group, R1 and R2 being either hydrogen, a C1-C6 alkyl group, or a C1-C6 ether-linked hydrocarbyl group, and R1 and R2 being capable of binding with the connected nitrogen atom to form a cyclic structure. The slurry of a positive electrode of a secondary lithium battery has superior performance, is environmentally friendly, mild and safe, and causes no irritation, thereby reducing damage to operators, and reducing the burden on the environment.