Abstract: Provided are a positive electrode material, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electrical apparatus. The positive electrode material comprises a manganese-containing active material and a functionalized carbon nanotube, where a surface of the functionalized carbon nanotube comprises lone pair electrons. The lone pair electrons on the surface of the functionalized carbon nanotube have a strong coordination capability. During charging and discharging of the secondary battery, the lone pair electrons can form a coordination structure with Mn2+ dissolved from the manganese-containing active material, to reduce the dissolution of the Mn2+, thereby improving a manganese dissolution phenomenon of the secondary battery, and then improving cycling performance of the secondary battery.

Abstract: A negative electrode plate includes a negative current collector and a negative film layer located on a surface of the negative current collector. The negative film layer has a length direction consistent with a length direction of the negative current collector and a width direction consistent with a width direction of the negative current collector. A cross section of the negative film layer perpendicular to the length direction includes a uniform thickness region located at a middle portion in the width direction and edge regions located at two ends in the width direction. Either of the edge regions has a thickness continuously decreasing in a direction from the uniform thickness region to the edge region. A width a of either of the two edge regions and an average thickness d of the uniform thickness region satisfy a/d?1.5 and d?300 ?m.

Abstract: The present disclosure provides a positive electrode slurry comprising a polyether siloxane, wherein the polyether siloxane may comprise at least the following structural units: wherein D is methyl or ethyl; A is hydrogen, halogen or haloalkyl; B is hydroxyl, R, OR, or ROR?, wherein the R and R? are each independently a linear or branched alkyl group containing 1 to 8 carbons; and E is phenyl, alkyl-substituted phenyl, ether-substituted phenyl, or halophenyl.

Abstract: A negative electrode plate includes a current collector and a negative electrode film layer disposed on at least one surface of the current collector. The negative electrode film layer includes a negative electrode active material and an emulsion-type binder. At least a portion of the emulsion-type binder is in irregular film-like distribution on surface of the negative electrode active material.

Abstract: A positive electrode slurry includes a lithium-containing phosphate material, a first positive electrode additive, a second positive electrode additive, and a binder. The first positive electrode additive includes at least one of a compound represented by structural formula 1 or a compound represented by structural formula 2 below. R1 is selected from C2-C4 alkylene, alkenylene, and derivatives thereof, substituted or unsubstituted by halogen. R2 and R3 are each independently alkyl, alkenyl, alkynyl, or aryl, substituted or unsubstituted by halogen. The binder includes a polymer including a repeating unit represented by structural formula 3 below. A pH value of the second positive electrode additive is greater than or equal to 10.0.

Abstract: Provided is a positive electrode slurry comprising a polyether phosphate, wherein the polyether phosphate may comprise at least the following structural units: and a structural unit (IV) that is a phosphate group, A being hydrogen, halogen or haloalkyl; B is hydroxyl, R, OR, or ROR?, the R and R? being each independently a linear or branched alkyl group containing 1 to 8 carbons; and E is phenyl, alkyl-substituted phenyl, ether-substituted phenyl, or halophenyl.

Abstract: A fluorine-containing copolymer has a weight average molecular weight of 600,000 to 2,000,000, and is represented by following formula: One of R1 and R2 is H, or unsubstituted or non-perfluoro-substituted C1-C8 linear or branched alkyl, and the other is H, F, or C1-C8 linear or branched alkyl substituted or unsubstituted with fluorine. R3 and R4 are each independently selected from H, F, or C1-C8 linear or branched alkyl substituted or unsubstituted with fluorine. R5-R7 are each independently selected from H, F, or C1-C8 linear or branched alkyl substituted or unsubstituted with fluorine. R8 is perfluoro-substituted C1-C8 linear or branched alkyl. m, n, and q are molar proportions of respective repeating units in the fluorine-containing copolymer. M?90%, 0<n<100%, and 0<q<100%.