Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.

Abstract: A non-aqueous secondary battery of the present invention includes a positive electrode, a negative electrode and a non-aqueous electrolyte. The positive electrode includes a positive electrode material mixture layer containing a lithium-containing transition metal oxide. The negative electrode includes a negative electrode material mixture layer and a porous layer containing an insulating material unreactive with lithium formed thereon. The negative electrode material mixture layer includes a negative electrode material including a core and a carbon covering layer covering a surface of the core. The core includes a material containing silicon and oxygen at an atomic ratio x of the oxygen to the silicon of 0.5?×?1.5. The material containing silicon and oxygen has a peak at least in a range of 1850 to 1860 eV in an X-ray absorption near edge structure spectrum at the K absorption edge of Si in a state in which discharge of the battery is finished.

Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.

Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2?y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.

Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.

Abstract: A lithium-containing complex oxide represented by General Formula: Li1+x+?Ni(1?x?y+?)/2Mn(1?x?y??)/2MyO2 (where 0?x?0.15, ?0.05?x+??0.2, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Mg, Ti, Cr, Fe, Co, Cu, Zn, Al, Ge, Zr and Sn) is provided. The lithium-containing complex oxide contains secondary particles formed of flocculated primary particles. The primary particles have a mean particle diameter of 0.3 to 3 ?m, and the secondary particles have a mean particle diameter of 5 to 20 ?m. By using this lithium-containing complex oxide as a positive active material, a non-aqueous secondary battery having a high capacity, excellent cycle durability and excellent storage characteristics at a high temperature is achieved.

Abstract: A non-aqueous secondary battery of the present invention includes a positive electrode, a negative electrode and a non-aqueous electrolyte. The positive electrode includes a positive electrode material mixture layer containing a lithium-containing transition metal oxide. The negative electrode includes a negative electrode material mixture layer and a porous layer containing an insulating material unreactive with lithium formed thereon. The negative electrode material mixture layer includes a negative electrode material including a core and a carbon covering layer covering a surface of the core. The core includes a material containing silicon and oxygen at an atomic ratio x of the oxygen to the silicon of 0.5?×?1.5. The material containing silicon and oxygen has a peak at least in a range of 1850 to 1860 eV in an X-ray absorption near edge structure spectrum at the K absorption edge of Si in a state in which discharge of the battery is finished.

Abstract: Because of the composition represented by General Formula: Li1+x+?Ni(1?x?y+?)/2MyO2 (where 0?x?0.05, ?0.05?x+??0.05, 0?y?0.4; ?0.1???0.1 (when 0?y?0.2) or ?0.24???0.24 (when 0.2<y?0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.

Abstract: A lithium-containing complex oxide represented by General Formula: Li1+x+&agr;Ni(1−x−y+&dgr;)/2Mn(1−x−y−&dgr;)/2MyO2 (where 0≦x≦0.15, −0.05≦x+&agr;≦0.2, 0≦y≦0.4; −0.1≦&dgr;≦0.1 (when 0≦y≦0.2) or −0.24≦&dgr;≦0.24 (when 0.2<y≦0.4); and M is at least one element selected from the group consisting of Mg, Ti, Cr, Fe, Co, Cu, Zn, Al, Ge, Zr and Sn) is provided. The lithium-containing complex oxide contains secondary particles formed of flocculated primary particles. The primary particles have a mean particle diameter of 0.3 to 3 &mgr;m, and the secondary particles have a mean particle diameter of 5 to 20 &mgr;m. By using this lithium-containing complex oxide as a positive active material, a non-aqueous secondary battery having a high capacity, excellent cycle durability and excellent storage characteristics at a high temperature is achieved.

Abstract: Because of the composition represented by General Formula: Li1+x+&agr;Ni(1−x−y+&dgr;)/2Mn(1−x−y−&dgr;)/2MyO2 (where 0≦x≦0.05, −0.05≦x+&agr;≦0.05, 0≦y≦0.4; −0.1≦&dgr;≦0.1 (when 0≦y≦0.2) or −0.24≦&dgr;≦0.24 (when 0.2≦y≦0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.