Abstract: A secondary battery electrode plate and a preparation method therefor, and a secondary battery are provided. The secondary battery electrode plate includes a current collector and a first active material layer. The first active material layer is located on a surface of the current collector and contains first active substance particles The first active substance particles have an equivalent sphericity X1 as represented by formula X1=3/(S1R1?1), where 0.05?X1?0.8; R1 is a median radius of the first active substance particles in a unit of ?m; S1 is a specific surface area of the first active substance particles in a unit of m2/g; and ?1 is true density of the first active substance particles in a unit of g/cm3.

Abstract: An electrode, a lithium battery, and a motor vehicle are provided. The electrode includes a current collector and an electrode active material layer arranged on at least one side surface of the current collector. The electrode active material layer includes at least two electrode active material sub-layers. The electrode active material sub-layers meet: n×?i?10000, n?2, and ?i?5000; and Hi-1<Hi. The first electrode active material sub-layer is in contact with the current collector.

Abstract: A positive electrode material and an application thereof are provided. The positive electrode material comprises a secondary particle formed by stacking a plurality of primary particles. The positive electrode material further comprises a rock-salt phase cladding layer disposed on a surface of the secondary particle. A ratio of a particle size of the secondary particle to an average particle size of the primary particles is greater than or equal to 1.5; and the primary particles and the rock-salt phase cladding layer respectively comprise a nickel-based active material.

Abstract: A battery includes a positive electrode plate, a negative electrode plate, an electrolyte solution, and a separator between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive current collector and a positive material layer disposed on the positive current collector. The negative electrode plate includes a negative current collector and a negative material layer disposed on the negative current collector. The positive electrode plate and the negative electrode plate are configured to have a strong liquid retention capability for the electrolyte solution that can reduce the occurrence of lithium plating during charging.

Abstract: An electrode plate includes an electrode active material layer. The electrode active material layer includes a three-dimensional conductive network base, and an electrode active material and a binder that are loaded on the three-dimensional conductive network base. The three-dimensional conductive network base and the electrode active material satisfy a relational expression below: d × 6 ? D 2 × ( m ? / ? ? D 3 6 ) ? V ? ( D 3 - ? ? D 3 6 ) × ( m ? / ? ? D 3 6 ) where V is an actual volume of the three-dimensional conductive network base, whose unit is cm3; m is mass of the electrode active material, whose unit is g; D is a D50 particle size of the electrode active material, whose unit is ?m; ? is true density of the electrode active material, whose unit is g/cm3; and d is a thickness of a single layer carbon atoms with a value of d is 0.334 nm.

Abstract: A positive electrode includes a current collector layer and an active component layer. The active component layer covers at least one surface of the current collector layer. The active component layer includes an active material and a conductive component. The conductive component includes at least one of a one-dimensional conductive material, a zero-dimensional conductive material, and a two-dimensional conductive material.