Secondary battery electrode, method for manufacturing same, and secondary battery

摘要

A secondary battery electrode includes an active material layer configured to be provided on a current collector and be obtained by stacking a plurality of active material sub-layers composed of an active material. Pores of which pore diameter along a thickness direction of the active material layer is 3 to 300 nm are formed along a boundary between the active material sub-layers, and at least a part of the pores is filled with an electrolyte and/or a product arising from reduction of the electrolyte upon assembling of a secondary battery.

主权项

1. A secondary battery including a cathode and an electrolyte, the secondary battery comprising:
an anode configured to be formed by stacking a plurality of anode active material layers containing an anode active material on an anode current collector, wherein at least two of the plurality of anode active material layers have an uneven surface state comprising projections and recesses and pores are formed by combining the projections and recesses of two of the anode active material layers along a boundary between the two anode active material layers, wherein the pores formed along the boundary between the anode active material layers have a pore diameter along a thickness direction of the anode active material layers of 70 nm to 300 nm, and wherein at least a part of the pores is filled with the electrolyte and/or a product arising from reduction of the electrolyte upon assembling of a secondary battery.