Patent ID: 8802299
Filing Date: 2014-08-12
Classification: H01M,Y02E

Abstract:
1. A non-aqueous electrolyte secondary battery, comprising: a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte dissolving a solute in a non-aqueous solvent; wherein the negative electrode comprises a negative electrode active material containing particulate silicon and/or silicon alloy and a binding agent, wherein the non-aqueous electrolyte contains fluorinated cyclic carbonate and diisocyanate compound of the general formula (1) below, and when Li storage volume per unit area of the negative electrode of the non-aqueous electrolyte secondary battery under charging condition is determined as A and the theoretical maximum Li storage volume per unit area of the negative electrode is determined as B, a utilizing rate (%) of negative electrode which is expressed by (A/B)×100 is 45% or less: wherein A represents at least one selected from a chain saturated hydrocarbon group and an aromatic hydrocarbon group expressed by the general formula (b) below, and wherein R