Lithium ion secondary battery

A lithium ion secondary battery comprising a cathode, an anode, a nonaqueous electrolytic solution, and a laminate film casing, wherein

• the anode comprises a non-graphitizable carbon which is amorphous as an anode activator;
• and
• the nonaqueous electrolytic solution consists of a nonaqueous solvent, an electrolyte, and an anode protecting component consisting of at least one sultone having a 5- to 7-membered cyclic sulfonate structure represented by general formula (1):
• wherein R1, R2, R3, R4, R5 and R6 independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms or an aryl group;
• and n represents an integer of 0 to 2,
• and at least one vinylene carbonate represented by general formula (2):
• wherein R1 and R2 independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms or an aryl group,
• wherein the non-aqueous solvent is selected from the group consisting of propylene carbonate, ethylene carbonate, butyrene carbonate, vinylene carbonate, linear carbonates, aliphatic carboxylates, γ-lactones, linear ethers, cyclic ethers, dimethyl sulfoxide, 1,3-dioxolane, formamide, acetamide, dimethylformamide, acetonitrile, propionitrile, nitromethane, ethyl monoglyme, phosphoric acid triesters, trimethoxymethane, dioxolane derivatives, sulfolane, methylsulfolane, 1,3-dimethyl-2-imidazolidinone, 3-methyl-2-oxazolidinone, propylene carbonate derivatives, tetrahydrofuran derivatives, ethyl ether, anisole, N-methylpyrrolidone and fluorocarboxylates.