Lithium-ion battery

A lithium-ion battery, comprising a wound core and tabs, wherein the wound core is formed by stacking and winding an inner separator, a first electrode sheet, an outer separator and a second electrode sheet, and the first electrode sheet and the second electrode sheet have opposite polarity;

• the inner separator is located at the innermost layer of the wound core, and each of the inner separator and the outer separator has a clamping section, a first straight section connected with the clamping section and located behind the clamping section, a tail laminating section extending beyond a tail end of the first electrode sheet, wherein the first straight section is located in front of the first electrode sheet, and the tail laminating section is a separator end, the inner separator has a first inner laminating section, the clamping section, the first straight section and the tail laminating section of the inner separator are respectively laminated with the clamping section, the first straight section and the tail laminating section of the outer separator, and the first inner laminating section of the inner separator is represented as two parts of the inner separator that are laminated;
• an adhesive surface of the first inner laminating section of the inner separator has a wet peeling force of ≥2 N/m and a ceramic surface of the first inner laminating section of the inner separator has a wet peeling force of ≥1 N/m.