Abstract: A negative electrode plate includes a negative electrode current collector and a negative electrode film layer formed on at least one surface of the negative electrode current collector. The negative electrode film layer has a first surface distant from the negative electrode current collector and a second surface arranged opposite to the first surface. The thickness of the negative electrode film layer is denoted as H. A region within a thickness range from the first surface to 0.3 H of the negative electrode film layer is denoted as a first region of the negative electrode film layer. A region within a thickness range from the second surface to 0.3 H of the negative electrode film layer is denoted as a second region of the negative electrode film layer. The binder content in the first region is less than the binder content in the second region.

Abstract: Provided are a graphite negative electrode active material and a preparation method therefor, a secondary battery containing the same, and a power consuming apparatus. A powder compaction density of the graphite negative electrode active material under a pressure of 49000 N is greater than or equal to 1.60 g/cm3, and a ratio Id/Ig of a peak intensity Id at 1250 cm?1 to 1500 cm?1 and a peak intensity Ig at 1500 cm?1 to 1650 cm?1 in a Raman spectrum of the graphite negative electrode active material is greater than or equal to 0.15.

Abstract: Provided are a graphite material and a preparation method therefor, a negative electrode plate containing the same, a battery, and a power consuming apparatus. The graphite material satisfies (Lc100% SOC?Lc0% SOC)/Lc50% SOC?0.0750 and Lc0% SOC being less than or equal to 50 nm.

Abstract: A secondary battery includes a negative electrode sheet. The negative electrode sheet includes a negative electrode current collector and a negative electrode film layer, which is arranged on at least one surface of the current collector and includes a negative electrode active material and a conductive agent. The powder conductivity ? of the negative electrode active material is greater than or equal to 80 S/cm but less than or equal to 106 S/cm, and the compaction density of the negative electrode film layer is 1.35 g/cm3 to 1.50 g/cm3.

Abstract: A carbon-based negative electrode active material, a preparation method, a secondary battery, and a power consuming apparatus are provided. A gram volume of the carbon-based negative electrode active material is 345 mAh/g to 355 mAh/g, and the powder compaction density at a pressure of 20000 N is greater than 1.55 g/cm3 and less than 1.65 g/cm3.

Abstract: A graphite negative electrode active material and a preparation method therefor, a secondary battery containing the same, and a power consuming apparatus. A volume distribution particle size Dv1 of the graphite negative electrode active material ranges from 1.5 ?m to 3 ?m, and the graphite negative electrode active material includes a primary particle morphology.

Abstract: A graphite negative electrode active material and a preparation method therefor, a secondary battery, and an electrical device. A degree of graphitization of the graphite negative electrode active material is 88%-93%, and an oil absorption value of the graphite negative electrode active material is not more than 50 ml/100 g.

Abstract: A particle body of the graphite negative electrode active material includes an internal region and a surface-layer region at least partially surrounding the internal region. The surface-layer region refers to a region formed by extending from a surface of the particle body of the graphite negative electrode active material to an interior of a particle by a distance of 30 nm. The mass percentage of crystalline carbon in the internal region is denoted as ?1, the mass percentage of crystalline carbon in the surface-layer region is denoted as ?2, and 10%??1??2?35%.

Abstract: A secondary battery includes a negative electrode plate. The negative electrode plate includes a negative electrode current collector and a negative electrode film layer formed on at least one surface of the negative electrode current collector. The negative electrode film layer has a first surface away from the negative electrode current collector and a second surface arranged opposite to the first surface. A thickness of the negative electrode film layer is denoted as H. A region within a thickness range from the second surface of the negative electrode film layer to 0.3H is denoted as a first region of the negative electrode film layer. A region within a thickness range from the first surface of the negative electrode film layer to 0.3H is denoted as a second region of the negative electrode film layer. The first region includes a first binder. The first binder is a linear binder.

Abstract: A secondary battery includes a negative electrode plate including a negative electrode current collector and a negative electrode film layer having a first surface distal to the negative electrode current collector and a second surface opposite to the first surface. A first region extending from the second surface to a thickness range of 0.3 H(H being a thickness of the negative electrode film layer) includes a first negative electrode active material including a first carbon-based material. A second region extending from the first surface to the thickness range of 0.3 H includes a second negative electrode active material including a second carbon-based material. The first carbon-based material includes natural graphite. A total pore area of an internal region of the second carbon-based material is greater than a total pore area of an external region of the second carbon-based material.

Abstract: A secondary battery includes a negative electrode plate, the negative electrode plate includes a negative electrode current collector and a negative electrode film layer on at least one surface of the negative electrode current collector, the negative electrode film layer includes a negative electrode active material, and the negative electrode active material includes a first carbon-based material and a second carbon-based material. The first carbon-based material has a pore structure, and the total pore area S2 of an internal region of the first carbon-based material is larger than the total pore area S1 of an external region of the first carbon-based material; and the second carbon-based material satisfies ID/IG?0.140.

Abstract: A secondary battery includes a negative electrode plate including a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector and including a negative electrode active material that includes a first carbon-based material and a second carbon-based material. The first carbon-based material includes an external region and an internal region located at an inner side of the external region. The external region extends from a surface of a particle of the first carbon-based material to an interior of the particle by a distance of 2.5 ?m. In a cross-sectional view of the first carbon-based material, a total pore area of the external region is smaller than a total pore area of the internal region. A degree of graphitization of the first carbon-based material is greater than a degree of graphitization of the second carbon-based material.

Abstract: A secondary battery includes a negative electrode plate; the negative electrode plate includes a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector and including a negative electrode active material; the negative electrode active material includes a first carbon-based material and a second carbon-based material; the first carbon-based material includes artificial graphite in the form of secondary particles; the second carbon-based material includes an external region and an internal region located on the inner side of the external region; and the external region refers to a region formed by extending from the surface of a particle of the second carbon-based material to the interior of the particle by a distance of 2.5 ?m.

Abstract: A secondary battery includes a negative electrode plate, and the negative electrode plate includes a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector and including a negative electrode active material, where the negative electrode active material includes a first carbon-based material and a second carbon-based material, the first carbon-based material has a pore structure, ID/IG of the first carbon-based material is less than or equal to 0.280, ID denotes the D peak intensity at 1350±50 cm?1 in the Raman spectrum, and IG denotes the G peak intensity at 1580±50 cm?1 in the Raman spectrum; and the second carbon-based material is an amorphous carbon material.

Abstract: A secondary battery includes negative electrode plate including negative electrode film layer having first surface and second surface opposite to each other. First region of the negative electrode film layer extending from the second surface to thickness range of 0.3H includes first active material including first carbon-based material. Second region of the negative electrode film layer extending from the first surface to thickness range of 0.3H includes second active material including second carbon-based material that includes amorphous carbon material. The first carbon-based material includes external region and internal region inside the external region. The external region extends from surface of particle of the first carbon-based material to interior of the particle by distance of 2.5 ?m. In cross-sectional view of the first carbon-based material, total pore area of the external region is smaller than total pore area of the internal region.

Abstract: A secondary battery includes a negative electrode sheet, where the negative electrode sheet includes a negative electrode current collector and a negative electrode film layer arranged on at least one surface of the negative electrode current collector, the negative electrode film layer includes a negative electrode active material, a compaction density of the negative electrode film layer is greater than or equal to 1.45 g/cm3, a liquid absorption rate of the negative electrode active material is 30 ml/100 g to 60 ml/100 g, and a tortuosity of the negative electrode sheet is less than or equal to 6.

Abstract: A secondary battery includes a negative electrode plate. The negative electrode plate includes a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector, wherein the negative electrode film layer is provided with a first surface away from the negative electrode current collector and a second surface opposite to the first surface, and the thickness of the negative electrode film layer is denoted as H; a region within a thickness range from the first surface of the negative electrode film layer to 0.3H is denoted as a first region, the first region includes a first negative electrode active material, and the first negative electrode active material includes a first carbon-based material; and the first carbon-based material satisfies that a total pore area of an external region is less than a total pore area of an internal region.

Abstract: Provided are secondary battery and an electric device. The secondary battery includes a negative electrode plate. The negative electrode plate includes a negative electrode current collector and a negative electrode film layer on at least one surface of the negative electrode current collector. The negative electrode film layer includes a negative electrode active material. The negative electrode active material includes a first carbon-based material and a second carbon-based material, and both the first carbon-based material and the second carbon-based material are provided with pore structures. The ID/IG of the first carbon-based material is ?0.27, and the ID/IG of the second carbon-based material is ?0.38, where the ID denotes the D peak intensity at 1350±50 cm?1 in a Raman spectrum, and the IG denotes the G peak intensity at 1580±50 cm?1 in a Raman spectrum.

Abstract: The present disclosure provides a secondary battery and an electric apparatus. The secondary battery comprises a negative electrode sheet including a negative electrode current collector and a negative electrode film layer disposed on at least one surface of the negative electrode current collector. The negative electrode film layer includes a first region adjacent to the negative electrode current collector and a second region adjacent to a surface away from the negative electrode current collector. ID/IG of an active material in the second region is greater than ID/IG of an active material in the first region. ID/IG is a ratio of a D peak intensity to a G peak intensity obtained by Raman mapping, where ID represents a D peak intensity at 1350±100 cm1 and IG represents a G peak intensity at 1580±100 cm?1.

Abstract: A secondary battery includes a negative electrode sheet, where the negative electrode sheet includes a negative electrode current collector and a negative electrode film layer disposed on at least one surface of the negative electrode current collector, the negative electrode film layer includes a negative electrode active material and a conductive agent, the negative electrode active material includes a graphite material, and the tap density of the graphite material is greater than or equal to 1.2 g/cm3; and based on the total mass of the negative electrode film layer, the mass percentage of the conductive agent is greater than or equal to 1.6%.