Abstract: In a nonaqueous electrolyte secondary battery a separator includes a porous substrate, a first filler layer, and a second filler layer. The first filler layer comprises phosphate particles having a BET specific surface area of 5 to 100 m2/g and polyvinylidene fluoride and is formed on a first surface that faces the positive electrode side of the substrate and contacts the positive electrode. The second filler comprises inorganic particles which have a melting point higher than that of the phosphate particles and is formed on at least one of a second surface that faces the negative electrode side of the substrate and the area between the substrate and the first filler layer. The content of the polyvinylidene fluoride in the first filler layer is 10 to 50 mass % and is higher in a region on the positive electrode side than in a region on the substrate side.

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The separator has a multilayer structure in which a first filler layer containing phosphate particles, a porous resin substrate, and a second filler layer containing inorganic particles having higher heat resistance than the phosphate particles are stacked in this order from the negative electrode side. The first filler layer is disposed on the porous resin substrate in such a manner that the surface of the first filler layer faces the surface of the negative electrode. The phosphate particles have a BET specific surface area in the range of 5 m2/g or more and 100 m2/g or less.

Abstract: In a nonaqueous electrolyte secondary battery, a negative electrode mix layer includes a first layer and a second layer disposed successively from a negative electrode collector. The first layer contains a first carbon-based active material having a 10% compressive strength of 3 MPa or less and a silicon-based active material containing Si. The second layer contains a second carbon-based active material having a 10% compressive strength of 5 MPa or more and has a lower content (mass ratio) of the silicon-based active material than the first layer.

Abstract: The present disclosure relates to a secondary battery module including a nonaqueous electrolyte secondary battery and an elastic body. The elastic body has a compressive elastic modulus of 5 MPa to 120 MPa. The nonaqueous electrolyte secondary battery includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector containing Ti as a main component and having a thickness of 1 ?m to 8 ?m. The negative electrode includes a first layer and a second layer sequentially formed from a side with the negative electrode collector. The first layer contains negative electrode active material particles containing first carbon-based active material particles with a 10% proof stress of 3 MPa or less. The second layer contains negative electrode active material particles containing second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.

Abstract: An advantage of the present invention is to suppress an increase in resistance during high-rate charge and discharge and a reduction in capacity during a charge and discharge cycle. An electrical storage module of the present embodiment includes: an electrical storage device, and an elastic body that is placed with the electrical storage device and receives a load from the electrical storage device in a placement direction. The electrical storage device includes a positive electrode, a negative electrode, and a separator. The negative electrode includes a negative-electrode active material layer. The negative-electrode active material layer includes a first layer formed on the negative-electrode current collector, and a second layer that is formed on the first layer and has a higher compression modulus than the first layer. The separator has a lower compression modulus than the first layer, and the elastic body has a lower compression modulus than the separator.

Abstract: In a non-aqueous electrolyte secondary battery according to one exemplary embodiment, a separator includes a substrate, a first filler layer containing phosphate particles and formed on at least one surface of the substrate, and a second filler layer containing inorganic particles and formed on a surface of the first filler layer on the side of the at least one surface of the substrate. The phosphate particles have a BET specific surface area of 5 m2/g or more and 100 m2/g or less.

Abstract: This negative electrode comprises an electrode current collector, and an electrode mixture layer provided on a surface of the electrode current collector. When, with respect to the thickness direction of the electrode mixture layer, a range from the surface on the side of the electrode current collector to 40% of the thickness of the electrode mixture layer is defined as a first region, and a range from the surface on the side opposite to the electrode current collector to 40% of the thickness of the electrode mixture layer is defined as a second region, the first region and the second region have different volume change ratio upon charge and discharge, and the region having the larger volume change ratio upon charge and discharge has a higher content of a solid inorganic filler and a lower content of a hollow inorganic filler than the region having the smaller volume change ratio.

Abstract: A secondary cell module according to the present invention has: at least one nonaqueous electrolyte secondary cell; and an elastic body that is arranged together with the nonaqueous electrolyte secondary cell and that receives a load from the nonaqueous electrolyte secondary cell in the direction of arrangement. The nonaqueous electrolyte secondary cell comprises: an electrode body in which a positive pole, a negative pole, and a separator disposed between the positive pole and the negative pole are laminated; and a housing which contains the electrode body, wherein the modulus of elastic compression of the elastic body is 5 MPa to 120 MPa, the positive pole has a positive pole collector containing Al and an element other than Al, and the thermal conductivity of the positive pole collector is 65 W/(m·K) to 150 W/(m·K).

Abstract: In a nonaqueous electrolyte secondary battery, a separator includes a substrate, a first filler layer containing phosphate salt particles, and a second filler layer interposed between the substrate and the first filler layer and containing inorganic particles. The separator is disposed between a positive electrode and a negative electrode in such a manner that the first filler layer and the second filler layer are directed to the positive electrode side. Further, a resin layer is disposed between the positive electrode and the first filler layer.

Abstract: This secondary cell module comprises anon-aqueous electrolyte secondary cell with: an electrode body in which a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode are layered; and a housing that accommodates the electrode body. The compression modulus of elasticity of the elastic body is in the range 5-120 MPa, and the positive electrode is provided with: a positive electrode current collector that contains titanium as a principal constituent and has a thickness of 1-8 ?m; and a positive electrode active material layer that is disposed on the positive electrode current collector and that includes a complex oxide containing lithium nickel, the proportion of nickel to the total quantity of metal elements other than lithium being in the range 70-100 mol %.

Abstract: A positive electrode including a positive electrode current collector, an intermediate layer disposed on the positive electrode current collector and including a conductive agent and inorganic particles, and a positive electrode mixture layer disposed on the intermediate layer and including a positive electrode active material and a hydrogen phosphate salt represented by the general formula MaHbPO4 (wherein a satisfies 1?a?2, b satisfies 1?b?2, and M includes at least one element selected from alkali metals and alkaline earth metals), the positive electrode satisfying 0.5?X?3.0, 1.0?Y?7.0, and 0.07?X/Y?3.0 wherein X is the mass ratio (mass %) of the hydrogen phosphate salt relative to the total mass of the positive electrode active material and Y is the mass ratio (mass %) of the conductive agent relative to the total mass of the intermediate layer.

Abstract: The present disclosure relates to a secondary battery module including a nonaqueous electrolyte secondary battery and an elastic body. The elastic body has a compressive elastic modulus of 5 MPa to 120 MPa. The positive electrode includes a positive electrode collector with a thermal conductive rate of 65 W/(m·K) to 150 W/(m·K). The negative electrode includes a negative electrode active material layer including a first layer and a second layer sequentially formed from a side with the negative electrode collector. The first layer contains first carbon-based active material particles with a 10% proof stress of 3 MPa or less. The second layer contains second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode and a separator disposed between the positive electrode and the negative electrode, wherein the separator includes an inorganic filler layer which includes a first filler layer containing phosphate salt particles and a second filler layer disposed on the first filler layer and containing inorganic particles more heat resistant than the phosphate salt particles, and the BET specific surface area of the phosphate salt particles is in the range of not less than 5 m2/g and not more than 100 m2/g.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode containing a lithium transition metal oxide as a positive electrode active material, a negative electrode containing a carbon material as a negative electrode active material, and a nonaqueous electrolyte. The lithium transition metal oxide contains W and Si, and W and Si adhere to the surface of the carbon material constituting the negative electrode active material. The amount of W adhering to the surface of the carbon material is 2 times or less in terms of a molar ratio to the amount of Si adhering to the surface of the carbon material.

Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries contains a lithium transition metal composite oxide that contains not less than 80% by mole of Ni relative to the total number of moles of metal elements other than Li; and Ti is present at least in the surfaces of particles of the composite oxide. With respect to this positive electrode active material, if particles having a volume-based particle diameter more than the 70% particle diameter (D70) are taken as first particles and particles having a volume-based particle diameter less than the 30% particle diameter (D30) are taken as second particles, the molar fraction (A2) of Ti relative to the total number of moles of metal elements in the surfaces of the second particles is higher than the molar fraction (A1) of Ti relative to the total number of moles of metal elements in the surfaces of the first particles.

Abstract: In a nonaqueous electrolyte secondary battery, a positive electrode contains a positive electrode active material A. The positive electrode active material A includes: a lithium transition metal composite oxide represented by a general formula of LiaNibCocMndAleMfOg (in the formula, M is at least one element selected from Groups IV, V, and VI, and 0.8?a?1.2, b?0.82, 0<c?0.08, 0.05?d?0.12, 0?e?0.05, 0.01?f?0.05, and 1?g?2 are satisfied) in the form of particles; a first layer composed of a lithium metal compound represented by a general formula of LixMyOz (in the formula, 1?x?4, 1?y?5, and 1?z?12 are satisfied) and formed on each particle surface of the lithium transition metal composite oxide; and a second layer composed of a boron compound and formed on the first layer. The first layer is formed over the entire particle surface of the lithium transition metal composite oxide without the second layer being interposed therebetween.

Abstract: A separator for use in a non-aqueous electrolyte secondary battery according to the present invention comprises a porous substrate and a filler layer disposed upon the substrate. The filler layer includes phosphate particles and a reticulated polyvinylidene fluoride resin. The filler layer has a polyvinylidene fluoride resin content of 15 mass % to 40 mass %, inclusive. The D10 particle size (D10) of the phosphate particles on a volume basis is 0.02 ?m to 0.5 ?m, inclusive, and is smaller than the average pore size of the pores in the substrate. The BET specific surface area of the phosphate particles 30 is 5 m2/g to 100 m2/g, inclusive.

Abstract: A separator for use in a non-aqueous electrolyte secondary battery according to the present invention comprises a porous substrate and a filler layer disposed upon the substrate. The filler layer includes phosphate particles and inorganic particles having a higher heat resistance than the phosphate particles. The D10 particle size (D10) of the phosphate particles on a volume basis is 0.02 ?m to 0.5 ?m, inclusive, and is smaller than the average pore size of the pores in the substrate. The BET specific surface area of the phosphate particles is 5 m2/g to 100 m2/g, inclusive, and is greater than the BET specific surface area of the inorganic particles. The D50 particle size (D50) of the inorganic particles on a volume basis is greater than the D50 particle size (D50) of the phosphate particles on a volume basis.

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and a styrene-butadiene rubber, and the glass transition temperature (Tg) of the styrene-butadiene rubber in an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector is higher than that of the styrene-butadiene rubber in an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer.

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and carboxymethyl cellulose, wherein the molecular weight of the carboxymethyl cellulose in an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer is smaller than that of the carboxymethyl cellulose in an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector.