An electrode plate comprising a current collector (10, 20) and an electrode active material layer (11, 21) disposed on at least one surface of the current collector (10, 20), wherein the current collector (10, 20) comprises a support layer (101, 201) and a conductive layer (102, 202) disposed on at least one surface of the support layer (101, 201), the conductive layer (102, 202) has a single-sided thickness D2 that satisfies: 30 nm≤D2≤3 μm and the support layer (101, 201) comprises a material selected from at least one of insulating polymer materials, insulating polymer composite materials, conductive polymer materials, and conductive polymer composite materials; and the electrode active material layer (11, 21) comprises an electrode active material, a binder and a conductive agent; and the electrode active material layer (11, 21) is divided into two regions, an inner region and an outer region, in a thickness direction of the electrode active material layer (11, 21); and the conductive agent is unevenly distributed in the electrode active material layer (11, 21) in a thickness direction of the electrode active material layer(ll, 21), in which the weight percentage of the conductive agent in the inner region of the electrode active material layer (11, 21) is higher than the weight percentage content of the conductive agent in the outer region of the electrode active material layer (11, 21) based on the total weight of the electrode active material layer (11, 21), and based on the total weight of the electrode active material layer (11, 21) at the inner region, the weight percentage of the conductive agent in the inner region is 20% to 80%, the weight percentage of the binder in the inner region is 20% to 80% and the balance is the electrode active material which is present in an amount of at least lwt%, the binder in the inner region of the electrode active material layer (11, 21) comprises a water-dispersible binder, and the water-dispersible binder constitutes 30% to 100% of the total weight of the binder at the inner region; and a ratio of a thickness H of the electrode active material layer (11, 21) at the inner region to a single-sided thickness D2 of the conductive layer (102, 202) is from 0.5:1 to 5:1 and the inner region has a thickness H of 0.1 to 5 μm. the current collector (10, 20) comprises a support layer (101, 201) and a conductive layer (102, 202) disposed on at least one surface of the support layer (101, 201), the conductive layer (102, 202) has a single-sided thickness D2 that satisfies: 30 nm≤D2≤3 μm and the support layer (101, 201) comprises a material selected from at least one of insulating polymer materials, insulating polymer composite materials, conductive polymer materials, and conductive polymer composite materials; and the electrode active material layer (11, 21) comprises an electrode active material, a binder and a conductive agent; and the electrode active material layer (11, 21) is divided into two regions, an inner region and an outer region, in a thickness direction of the electrode active material layer (11, 21); and the conductive agent is unevenly distributed in the electrode active material layer (11, 21) in a thickness direction of the electrode active material layer(ll, 21), in which the weight percentage of the conductive agent in the inner region of the electrode active material layer (11, 21) is higher than the weight percentage content of the conductive agent in the outer region of the electrode active material layer (11, 21) based on the total weight of the electrode active material layer (11, 21), and based on the total weight of the electrode active material layer (11, 21) at the inner region, the weight percentage of the conductive agent in the inner region is 20% to 80%, the weight percentage of the binder in the inner region is 20% to 80% and the balance is the electrode active material which is present in an amount of at least lwt%, the binder in the inner region of the electrode active material layer (11, 21) comprises a water-dispersible binder, and the water-dispersible binder constitutes 30% to 100% of the total weight of the binder at the inner region; and a ratio of a thickness H of the electrode active material layer (11, 21) at the inner region to a single-sided thickness D2 of the conductive layer (102, 202) is from 0.5:1 to 5:1 and the inner region has a thickness H of 0.1 to 5 μm.