| CPC H01M 4/74 (2013.01) [H01M 10/052 (2013.01); H01M 10/0585 (2013.01)] | 17 Claims |
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1. A stacked electrode assembly, comprising;
a first electrode at a first portion of the stacked electrode assembly, the first electrode being a negative electrode and including a negative electrode active material, wherein the first electrode includes a first mesh electrode current collector, and a second mesh electrode current collector, and a third mesh electrode current collector in the thickness direction of the first electrode,
the first mesh electrode current collector is interposed between the second mesh electrode current collector and the third mesh electrode current collector, and
the second and third mesh electrode current collectors have openings at different locations or have different aperture ratios from the first mesh electrode current collector;
a second electrode at a second portion of the stacked electrode assembly;
a unit stacked body between the first electrode and the second electrode;
a first separator between the first electrode and the unit stacked body; and
a second separator between the unit stacked body and the second electrode, wherein:
the unit stacked body includes a first positive electrode, a first negative electrode, and a third separator, the third separator being between the first positive electrode and the first negative electrode, and
the first mesh electrode current collector is spaced apart from the second mesh electrode current collector in a thickness direction of the first electrode.
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