Abstract: A polymer includes an anchor group, a solvating segment, and an end group. The anchor group is any one or more selected from —COOR1, —SO3R2, or —PO(OR3)OR4. R1, R2, R3 and R4 each independently include a first group and a second group. The first group is H. The second group is any one or more selected from C1 to C12 alkyl, C6 to C20 aryl, or C5 to C20 heteroaryl. The solvating segment is any one or more selected from segments that include the following structural units.

Abstract: A positive electrode plate, a secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The positive electrode plate includes a positive current collector, and a positive active material layer disposed on at least one surface of the positive current collector. The positive active material layer includes a first active material layer and a second active material layer that are sequentially stacked in a direction away from the surface. The first active material layer includes a first composite particle. The first composite particle includes a first lithium iron phosphate particle and a first carbon layer that coats a surface of the first lithium iron phosphate particle. The second active material layer includes a second composite particle. The second composite particle includes a second lithium iron phosphate particle and a second carbon layer that coats a surface of the second lithium iron phosphate particle.

Abstract: A functional polymer, an electrode slurry, an electrode plate, a battery and a power consuming device are described. The functional polymer comprises structural units represented by formula (A), formula (B) and formula (C). The functional polymer can increase the dispersion stability of the electrode slurry and also have the function of toughening, so as to increase the dispersion uniformity of the components in an electrode active layer while increasing its toughness, and further increase the cycling stability of the battery.

Abstract: A positive electrode plate, a secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The positive electrode plate includes a positive current collector, and a positive active material layer disposed on at least one surface of the positive current collector. The positive active material layer includes a first active material layer and a second active material layer that are sequentially stacked in a direction away from the surface. The first active material layer includes a first composite particle. The first composite particle includes a first lithium iron phosphate particle and a first carbon layer that coats a surface of the first lithium iron phosphate particle. The second active material layer includes a second composite particle. The second composite particle includes a second lithium iron phosphate particle and a second carbon layer that coats a surface of the second lithium iron phosphate particle.

Abstract: A positive electrode active material composition, a water-based positive electrode slurry, a positive electrode plate, a secondary battery, and an electrical device are disclosed. The positive electrode active material composition includes a first positive electrode active material, a second positive electrode active material, and a third positive electrode active material, the first positive electrode active material has a volume average particle size Dv50 denoted as A1 in ?m, with A1 satisfying 0.2?A1?0.8; the second positive electrode active material has a volume average particle size Dv50 denoted as A2 in ?m, with A2 satisfying 1.0?A2?2.5; and the third positive electrode active material has a volume average particle size Dv50 denoted as A3 in ?m, with A3 satisfying 3.0?A3?6.0. The positive electrode plate of the present application has both a higher compaction density and a lower water content.

Abstract: An electrode plate, which includes a current collector and an active material layer arranged on at least one surface of the current collector. The active material layer includes an electrode active material and a softener. The softener includes one or more of A diblock copolymer A-B and a triblock copolymer A-B-A, where block A includes a polyether segment, and block B includes one or more of a polyamide segment, a polyvinylpyrrolidone segment and a polyacrylonitrile segment.

Abstract: The present application provides a dispersant and a preparation method thereof, a slurry composition and a preparation method thereof, an electrode, and an apparatus containing the electrode plate. The dispersant includes a block copolymer having a first block and a second block, the first block includes a first repeating structural unit shown in Formula I) and a second repeating structural unit shown in Formula II), and the second block includes a third repeating structural unit shown in Formula III) and a fourth repeating structural unit shown in Formula IV), in which n is any integer from 1-25, R1 to R7 are independently selected from hydrogen, halogen, cyano, carbonyl, carboxy, nitro, sulfonyl, amide, ester, substituted or unsubstituted C1-C15 alkyl or alkoxy, and substituted or unsubstituted C6-C30 aryl and R8, R9, and R10 have a dipole moment of greater than 2×10?30 C·m.

Abstract: A positive electrode sheet includes a positive electrode current collector and a positive electrode film disposed on at least one surface of the positive electrode current collector and including an additive. The additive includes a structural unit made from acrylonitrile and a structural unit made from a monomer represented by following formula: where R1, R2, R3, and R4 are each independently selected from hydrogen, an alkyl group with 1-8 carbon atoms, or a saturated carboxylic acid group with 1-8 carbon atoms, and at least one of R1, R2, R3, or R4 is selected from the saturated carboxylic acid group with 1-8 carbon atoms.

Abstract: A positive electrode plate, a secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The positive electrode plate includes a positive current collector, and a positive active material layer disposed on at least one surface of the positive current collector. The positive active material layer includes a first active material layer and a second active material layer that are sequentially stacked in a direction away from the surface. The first active material layer includes a first composite particle. The first composite particle includes a first lithium iron phosphate particle and a first carbon layer that coats a surface of the first lithium iron phosphate particle. The second active material layer includes a second composite particle. The second composite particle includes a second lithium iron phosphate particle and a second carbon layer that coats a surface of the second lithium iron phosphate particle.

Abstract: A positive electrode plate, a secondary battery comprising the positive electrode plate, as well as a battery module, a battery pack, and a power consuming device are provided. The positive electrode plate of the present invention comprises: a positive current collector and a positive film layer comprising a first positive film layer and a second positive film layer, wherein the first positive film layer is disposed on at least one surface of the positive current collector and comprises a first positive active material comprising a hollow particle material, and the second positive film layer is disposed on the first positive film layer and comprises a second positive active material comprising a solid particle material.