Abstract: The cathode composite material of the present disclosure contains a cathode active material composed of a lithium transition metal oxide having a layered crystalline structure, a binder, and a conductivity aid. The lithium transition metal oxide includes nickel, cobalt, and manganese. The binder includes polyvinylidene fluoride. The conductivity aid includes carbon nanotubes. The amount of lithium hydroxide contained in the cathode active material is 0.15% by mass or more and 0.35% by mass or less with respect to the total amount of the cathode active material.

Abstract: A non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, and a separator, wherein the positive electrode includes a positive electrode active material layer, the positive electrode active material layer includes a positive electrode active material having a layered structure, the positive electrode active material is in the form of secondary particles, the secondary particles have an average particle size of 8.0 ?m or more, and a ratio of a DBP oil absorption number of the secondary particles to a BET specific surface area of the secondary particles is 0.3 or more.

Abstract: The present disclosure provides a positive electrode active material having a spinel-type crystal structure that can reduce an increase in resistance and a decrease in capacity retention rate due to repeated charging and discharging of a non-aqueous electrolyte secondary battery. The positive electrode active material disclosed herein is configured of a lithium manganese composite oxide having a spinel-type crystal structure, wherein the lithium manganese composite oxide includes secondary particles in which a plurality of primary particles are aggregated, an average particle diameter of the secondary particles based on a SEM image is 10 ?m or more and 20 ?m or less, an average particle diameter of the primary particles based on a SEM image is 4 ?m or more and 8 ?m or less, and nickel atoms are provided in the surface layer portion of the secondary particles.

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte, wherein the separator includes a first surface facing the positive electrode and a second surface facing the negative electrode, an adhesive layer is formed on the second surface or each of the first surface and the second surface, the adhesive layer includes inorganic particles and an organic binder, and a ratio of a peeling strength between the separator and the adhesive layer to a peeling strength between the negative electrode and the adhesive layer is more than 0 and 4.0 or less.

Abstract: Provided is a non-aqueous electrolyte secondary battery using a spinel-type manganese-containing composite oxide, in which the capacity deterioration in repeated charging and discharging at a high temperature is suppressed. A non-aqueous electrolyte secondary battery disclosed herein includes a positive electrode, a negative electrode, and a non-aqueous electrolytic solution. The positive electrode includes a positive electrode active material layer containing a positive electrode active material. The positive electrode active material includes a lithium composite oxide having a spinel-type crystal structure and including Mn. The positive electrode active material layer includes 0.05% by mass or more and 1.0% by mass or less of orthophosphoric acid with respect to the positive electrode active material. The negative electrode includes a negative electrode active material layer containing a negative electrode active material. The negative electrode active material is graphite.

Abstract: Provided is a non-aqueous electrolyte secondary battery using a spinel-type manganese-containing composite oxide, in which the capacity deterioration in repeated charging and discharging at a high temperature is suppressed. A non-aqueous electrolyte secondary battery disclosed herein includes a positive electrode, a negative electrode, and a non-aqueous electrolytic solution. The positive electrode includes a positive electrode active material layer containing a positive electrode active material. The positive electrode active material includes a lithium composite oxide having a spinel-type crystal structure and including Mn. The positive electrode active material layer includes 0.05% by mass or more and 1.0% by mass or less of phosphonic acid with respect to the positive electrode active material. The negative electrode includes a negative electrode active material layer containing a negative electrode active material. The negative electrode active material is graphite.

Abstract: A nonaqueous electrolyte secondary battery is provided which is suppressed in capacity deterioration upon repeating charging and discharging irrespective of cracks being formed in a lithium manganese oxide particle having a spinel type crystal structure. The nonaqueous electrolyte secondary battery herein disclosed includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode includes a positive electrode active material layer. The positive electrode active material layer includes lithium manganese oxide particles having a spinel type crystal structure as the positive electrode active material. At least a part of the lithium manganese oxide particles has a cracked part. The lithium manganese oxide particles have a coating film on the particle surface including the surface of the cracked part. The coating film contains a P component including a LiMnPO4 component, and a F component.

Abstract: Provided is a positive electrode using a spinel-type lithium-manganese-based composite oxide, which can impart, to a non-aqueous electrolyte secondary battery, excellent capacity deterioration resistance upon repeated charging and discharging. The positive electrode disclosed herein includes a positive electrode current collector and a positive electrode active material layer supported by the positive electrode current collector. The positive electrode active material layer includes a lithium-manganese-based composite oxide having a spinel-type crystal structure and including Mn, a lithium-nickel-based composite oxide including Li and Ni, and lithium phosphate.

Abstract: A main object of the present disclosure is to provide an anode layer with little resistance increase due to charge and discharge. In the present disclosure, the above object is achieved by providing an anode layer comprising: an anode active material including a Nb element, a W element, and an O element; and a solid electrolyte, and an expansion coefficient of the anode active material when charged to 200 mAh per 1 g is 1.4% or more and 5% or less.

Abstract: The present disclosure provides a positive electrode active material having a spinel-type crystal structure that can reduce an increase in resistance and a decrease in capacity retention rate due to repeated charging and discharging of a non-aqueous electrolyte secondary battery. The positive electrode active material disclosed herein is configured of a lithium manganese composite oxide having a spinel-type crystal structure, wherein the lithium manganese composite oxide includes secondary particles in which a plurality of primary particles are aggregated, an average particle diameter of the secondary particles based on a SEM image is 10 ?m or more and 20 ?m or less, an average particle diameter of the primary particles based on a SEM image is 4 ?m or more and 8 ?m or less, and nickel atoms are provided in the surface layer portion of the secondary particles.

Abstract: A main object of the present disclosure is to provide an anode layer with little resistance increase due to charge and discharge. In the present disclosure, the above object is achieved by providing an anode layer comprising: an anode active material including a Nb element, a W element, and an O element; and a solid electrolyte, and an expansion coefficient of the anode active material when charged to 200 mAh per 1 g is 1.4% or more and 5% or less.

Abstract: A main object of the present disclosure is to provide an anode layer with high capacity durability. In the present disclosure, the above object is achieved by providing an anode layer comprising: an anode active material including a Nb element, a W element, and an O element; and a sulfide solid electrolyte.

Abstract: An all-solid-state secondary battery, including: a solid electrolyte layer; a positive electrode layer including a positive electrode active material layer and a first current collector layer; a negative electrode layer including a second current collector layer, the positive electrode layer and the negative electrode layer sandwiching the solid electrolyte layer; and external electrodes connected respectively to the first current collector layer and the second current collector layer, wherein the positive electrode active material layer is formed of an olivine-type active material, wherein the solid electrolyte layer is formed of a phosphate having a NASICON-type structure, and wherein the solid electrolyte layer contains particulate precipitate having an olivine-type crystal structure that includes a same element as an element forming the positive electrode active material layer.

Abstract: An all-solid-state secondary battery, including: a solid electrolyte layer; a positive electrode layer including a positive electrode active material layer and a first current collector layer; a negative electrode layer including a second current collector layer, the positive electrode layer and the negative electrode layer sandwiching the solid electrolyte layer; and external electrodes connected respectively to the first current collector layer and the second current collector layer, wherein the positive electrode active material layer is formed of an olivine-type active material, wherein the solid electrolyte layer is formed of a phosphate having a NASICON-type structure, and wherein the solid electrolyte layer contains particulate precipitate having an olivine-type crystal structure that includes a same element as an element forming the positive electrode active material layer.

Abstract: An all-solid-state secondary battery, including: a solid electrolyte layer; a positive electrode layer including a positive electrode active material layer and a first current collector layer; a negative electrode layer including a second current collector layer, the positive electrode layer and the negative electrode layer sandwiching the solid electrolyte layer; and external electrodes connected respectively to the first current collector layer and the second current collector layer, wherein the positive electrode active material layer is formed of an olivine-type active material, wherein the solid electrolyte layer is formed of a phosphate having a NASICON-type structure, and wherein the solid electrolyte layer contains particulate precipitate having an olivine-type crystal structure that includes a same element as an element forming the positive electrode active material layer.

Abstract: An all-solid-state secondary battery, including: a solid electrolyte layer; a positive electrode layer including a positive electrode active material layer and a first current collector layer; a negative electrode layer including a second current collector layer, the positive electrode layer and the negative electrode layer sandwiching the solid electrolyte layer; and external electrodes connected respectively to the first current collector layer and the second current collector layer, wherein the positive electrode active material layer is formed of an olivine-type active material, wherein the solid electrolyte layer is formed of a phosphate having a NASICON-type structure, and wherein the solid electrolyte layer contains particulate precipitate having an olivine-type crystal structure that includes a same element as an element forming the positive electrode active material layer.