Abstract: In a cross section parallel to a thickness direction of a negative electrode active material layer, an average tortuosity ratio is 1.5 to 2.5. The average tortuosity ratio is calculated by the following formula: “R=B/A”. In the formula, “R” represents the average tortuosity ratio. “B” represents an average value of lengths of shortest routes each extending from a contact point between a negative electrode substrate and a negative electrode active material particle to a surface of the negative electrode active material layer along contour lines of a plurality of negative electrode active material particles. “A” represents an average value of a thicknesses of the negative electrode active material layer.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery is provided. The positive electrode active material includes a layer-structured, nickel-containing lithium transition metal complex oxide. The lithium transition metal complex oxide contains titanium and niobium in a chemical composition thereof, and has a ratio of a total number of moles of titanium and niobium relative to a total number of moles of metals excluding lithium in the chemical composition of 0.04 or less.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery is provided. The positive electrode active material includes a layer-structured, nickel-containing lithium transition metal complex oxide. The lithium transition metal complex oxide contains titanium and niobium in a chemical composition thereof, and has a ratio of a total number of moles of titanium and niobium relative to a total number of moles of metals excluding lithium in the chemical composition of 0.04 or less.

Abstract: A positive electrode composition for a non-aqueous secondary battery, including: titanium boride particles; and a positive electrode active material comprising lithium transition metal complex oxide particles that comprise nickel in a composition and have a layered structure. The titanium boride particles comprise an oxygen component in a content of greater than or equal to 1.5 wt % and less than or equal to 2.9 wt %. A content of the titanium boride particles relative to the lithium transition metal complex oxide particles is less than or equal to 1.5 mol % in titanium equivalent terms.

Abstract: A method for producing a positive electrode material for non-aqueous secondary batteries includes: performing a heat treatment on zirconium boride particles in an oxygen-containing atmosphere at a heat treatment temperature of not less than 220° C. and not more than 390° C., thereby obtaining heat-treated particles; and mixing the heat-treated particles with a positive electrode active material which contains a lithium transition metal complex oxide particles including at least one of cobalt and nickel in a composition thereof and having a layered structure, such that a content of the heat-treated particles relative to the lithium transition metal complex oxide particles is, as zirconium, not less than 0.25 mol % and not more than 2.2 mol %, thereby obtaining a positive electrode material for non-aqueous secondary batteries.

Abstract: A positive electrode material for nonaqueous secondary batteries includes lithium transition metal composite oxide particles containing at least one of cobalt and nickel; and titanium silicide particles. The lithium transition metal composite oxide particles have a layer structure. The lithium transition metal composite oxide particles and the titanium silicide particles are present as particles substantially independent from each other. The titanium silicide particles have an average particle diameter of 4.0 ?m or less. The titanium silicide particles are contained at a content ratio of titanium of 1.2 mol % or less with respect to the lithium transition metal composite oxide particles.

Abstract: A method for producing a positive electrode material for non-aqueous secondary batteries includes: performing a heat treatment on zirconium boride particles in an oxygen-containing atmosphere at a heat treatment temperature of not less than 220° C. and not more than 390° C., thereby obtaining heat-treated particles; and mixing the heat-treated particles with a positive electrode active material which contains a lithium transition metal complex oxide particles including at least one of cobalt and nickel in a composition thereof and having a layered structure, such that a content of the heat-treated particles relative to the lithium transition metal complex oxide particles is, as zirconium, not less than 0.25 mol % and not more than 2.2 mol %, thereby obtaining a positive electrode material for non-aqueous secondary batteries.

Abstract: A method for producing a positive electrode material for non-aqueous secondary batteries includes: performing a heat treatment on zirconium boride particles in an oxygen-containing atmosphere at a heat treatment temperature of not less than 220° C. and not more than 390° C., thereby obtaining heat-treated particles; and mixing the heat-treated particles with a positive electrode active material which contains a lithium transition metal complex oxide particles including at least one of cobalt and nickel in a composition thereof and having a layered structure, such that a content of the heat-treated particles relative to the lithium transition metal complex oxide particles is, as zirconium, not less than 0.25 mol % and not more than 2.2 mol %, thereby obtaining a positive electrode material for non-aqueous secondary batteries.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery is provided. The positive electrode active material includes a layer-structured, nickel-containing lithium transition metal complex oxide. The lithium transition metal complex oxide contains titanium and niobium in a chemical composition thereof, and has a ratio of a total number of moles of titanium and niobium relative to a total number of moles of metals excluding lithium in the chemical composition of 0.04 or less.

Abstract: A method of producing a positive electrode composition for a non-aqueous secondary battery is provided. The method includes heat-treating titanium boride particles at a temperature in a range of 150° C. to 300° C. under an oxygen-containing atmosphere to obtain heat-treated particles and mixing the heat-treated particles with a positive electrode active material comprising lithium transition metal complex oxide particles that comprise nickel in a composition and have a layered structure such that a content of the heat-treated particles relative to the lithium transition metal complex oxide particles is less than or equal to 1.5 mol % in titanium equivalent terms.

Abstract: A method of producing a positive electrode composition for a non-aqueous secondary battery is provided. The method includes heat-treating titanium boride particles at a temperature in a range of 150° C. to 300° C. under an oxygen-containing atmosphere to obtain heat-treated particles and mixing the heat-treated particles with a positive electrode active material comprising lithium transition metal complex oxide particles that comprise nickel in a composition and have a layered structure such that a content of the heat-treated particles relative to the lithium transition metal complex oxide particles is less than or equal to 1.5 mol % in titanium equivalent terms.

Abstract: A method of producing a positive electrode active material for a nonaqueous electrolyte secondary battery, the method including: stirring core particles including a lithium-transition metal composite oxide represented by a formula: LiaNi1-x-y-zCoxM1yM2zO2 wherein 1.00?a?1.50, 0.00?x?0.50, 0.00?y?0.50, 0.00?z?0.02, x+y?0.70, M1 consists of Mn and Al, and M2 is at least one element selected from the group consisting of Zr, W, Ti, Mg, Ta, Nb and Mo; mixing the core particles with a first solution containing a rare earth element and a second solution containing a fluorine-containing compound; and heating the coated core particles at a temperature no greater than 500° C.

Abstract: A positive electrode material for nonaqueous secondary batteries includes lithium transition metal composite oxide particles containing at least one of cobalt and nickel; and titanium silicide particles. The lithium transition metal composite oxide particles have a layer structure. The lithium transition metal composite oxide particles and the titanium silicide particles are present as particles substantially independent from each other. The titanium silicide particles have an average particle diameter of 4.0 ?m or less. The titanium silicide particles are contained at a content ratio of titanium of 1.2 mol % or less with respect to the lithium transition metal composite oxide particles.

Abstract: A method for producing a positive electrode material for non-aqueous secondary batteries includes: performing a heat treatment on zirconium boride particles in an oxygen-containing atmosphere at a heat treatment temperature of not less than 220° C. and not more than 390° C., thereby obtaining heat-treated particles; and mixing the heat-treated particles with a positive electrode active material which contains a lithium transition metal complex oxide particles including at least one of cobalt and nickel in a composition thereof and having a layered structure, such that a content of the heat-treated particles relative to the lithium transition metal complex oxide particles is, as zirconium, not less than 0.25 mol % and not more than 2.2 mol %, thereby obtaining a positive electrode material for non-aqueous secondary batteries.

Abstract: A method of producing a positive electrode composition for a non-aqueous secondary battery is provided. The method includes heat-treating titanium boride particles at a temperature in a range of 150° C. to 300° C. under an oxygen-containing atmosphere to obtain heat-treated particles and mixing the heat-treated particles with a positive electrode active material comprising lithium transition metal complex oxide particles that comprise nickel in a composition and have a layered structure such that a content of the heat-treated particles relative to the lithium transition metal complex oxide particles is less than or equal to 1.5 mol % in titanium equivalent terms.

Abstract: A method of producing a positive electrode active material for a non-aqueous electrolyte secondary battery, the method including: stirring core particles including a lithium-transition metal composite oxide represented by a formula: LiaNi1-x-y-zCoxM1yM2zO2 wherein 1.00?a?1.50, 0.00?x?0.50, 0.00?y?0.50, 0.00?z?0.02, x+y?0.70, M1 is at least one element selected from the group consisting of Mn and Al, and M2 is at least one element selected from the group consisting of Zr, W, Ti, Mg, Ta, Nb and Mo; mixing the core particles with a first solution containing a rare earth element and a second solution containing a fluorine-containing compound, each independently, by adding dropwise the first solution and the second solution as the core particles are being stirred until the amount of the rare earth element added reaches 0.02 mol % to 0.15 mol % based on the amount of the core particles and the amount of the elemental fluorine added reaches 0.07 mol % to 0.