| 摘要 |
PROBLEM TO BE SOLVED: To improve the characteristics of a secondary battery using nonaqueous electrolyte, and particularly improve its shelf characteristic. SOLUTION: Lithium composite nickel oxide as active material for a nonaqueous electrolyte battery is expressed by a chemical formula Lx Niy M1-y Oz (where x: 1.10>=x>=0.98, M is one kind or more of Co, Mn, Cr, Fe, Mg, Al, y: 0.95>=y>=0.7) is particles which are the aggregation of primary particles of 2μm or less, space volume having pore radii of 30Å or less is 10% or less against the whole space volume, and the whole volume of space having pore radii of 30Å less is 0.002cm<3> /g or less. A positive electrode formed by adding the most suitable amount of conduction material and a hinder to positive electrode active material is used, and further the electrolyte amount and the electrolyte solvent composition of the battery are optimized. |
