| CPC H01M 10/0565 (2013.01) [H01M 10/052 (2013.01); H01M 2300/0085 (2013.01)] | 16 Claims |
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1. A lithium secondary battery comprising:
a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and an electrolyte solution,
wherein a patterned gel polymer electrolyte layer is included on one surface or both surfaces of at least one structure of the positive electrode, the negative electrode, or the separator,
wherein the patterned gel polymer electrolyte layer comprises uncoated portions and a plurality of line-type coating portions which are spaced apart from each other and arranged in parallel,
wherein the line-type coating portions are formed in an oblique direction in direction to an edge of the at least one structure,
wherein a width of one of lines constituting the coating portion:a width of the uncoated portion between the lines constituting the coating portion is in a range of 1:1 to 10:1,
wherein the gel polymer electrolyte has a thickness of 0.1 μm to 1 μm,
wherein an area of the coating portions of the patterned gel polymer electrolyte layer is in a range of 61% to 90% of a total area of the at least one structure of the positive electrode or the negative electrode, and
wherein a width of one of lines constituting the coating portion is in a range of 14% to 90% based on a thickness of the negative electrode.
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