Nonaqueous-electrolyte battery

Production of Positive Electrode

[0126]To N-methylpyrrolidone (NMP) were added 90% by weight lithium-manganese oxide (LiMn2O4) powder as a positive active material, 3% by weight acetylene black and 3% by weight graphite as conductive materials, and 4% by weight poly(vinylidene fluoride) (PVdF). The ingredients were mixed together to obtain a slurry. This slurry was applied to each side of a current collector which was an aluminum foil having a thickness of 15 μm. The slurry applied was dried, and the coated foil was pressed to thereby produce a positive electrode having an electrode density of 3.0 g / cm3.

[0127]

[0128]A spinel lithium titanate (Li4Ti5O12) powder having an average particle diameter of 0.84 μm, BET specific surface area of 10.8 m2 / g, and lithium insertion potential of 1.55 V (vs. Li / Li+) was prepared as a negative active material. The particle diameter of this negative active material was determined with a laser diffraction type distribution analyzer (SALD-300, manufac

[0137]Nonaqueous-electrolyte secondary batteries were produced in the same manners as in Examples 4 and 10, except that 1,4-diisocyanatobutane was added in place of the 1,6-diisocyanatohexane in preparing the nonaqueous electrolytes.

[0138]Nonaqueous-electrolyte secondary batteries were produced in the same manner as in Example 10, except that 1-isocyanatoethane, 2-isocyanatopropane, 1-isocyanatohexane, 1-isocyanatobutane, or 3-isocyanato-1-propene was added in place of the 1,6-diisocyanatohexane in preparing the nonaqueous electrolyte.