LITHIUM SECONDARY BATTERY

摘要

PURPOSE: To provide a lithium secondary battery whose discharge capacity can be increased by preventing segregation of lithium metal on a negative electrode can inside surface and a surface of a lead plate by completely cutting off a passage of a lithium ion to outside from inside of a wound electrode. CONSTITUTION: A circumferential directional outside edge part of a separator 1 is formed longer by one round or more than the outermost circumferential length of an electrode 2. Parts exceeding a vertical width of sheet-like electrodes 2 and 3 in upper and lower end parts of the separator are adhered to each other by a pressure sensitive adhesive 4 insoluble in electrolyte. An inside surface of a circumferential directional outside end part of the separator is adhered to an electrode inside of the separator through the pressure sensitive adhesive 4 insoluble in the electrolyte. Mutually superimposed parts are adhered to each other in the circumferential directional edge part of the separator through the pressure sensitive adhesive 4 insoluble in the electrolyte.