Negative pole piece, secondary battery and electric device

The invention provides a negative pole piece, a secondary battery and an electric device. The negative pole piece comprises a negative current collector and a negative active layer located on at least one surface of the negative current collector, and the surface, away from the negative current collector, of the negative active layer contains an alkali metal salt polymer. The alkali metal polymer is introduced to the surface of the negative electrode active layer, and a polymer chain of the alkali metal polymer can provide a channel for transmission of lithium ions, so that transmission of the lithium ions towards the interior of the negative electrode active layer can be promoted, concentration polarization in the thickness direction of the pole piece can be reduced, and the fast charging performance of the battery can be improved. 本申请提供了一种负极极片、二次电池以及用电装置。负极极片包括负极集流体以及位于所述负极集流体至少一个表面之上的负极活性层，所述负极活性层的远离所述负极集流体的表面含有碱金属盐类聚合物。在负极活性层的表面引入碱金属类聚合物，碱金属类聚合物的聚合物链可以为锂离子的传输提供通道，可以促进锂离子朝向负极活性层的内部传输，进而可以降低极片厚度方向的浓差极化，提升电池