| abstract |
There is provided a lithium secondary battery in the form of a film exterior that is provided with a lithium composite oxide sintered compact plate as a positive electrode plate and is less likely to wrinkle near an end of the positive electrode plate even when repeatedly bent. This lithium secondary battery includes a positive electrode plate, which is a lithium composite oxide sintered plate, a negative electrode layer, a separator, an electrolyte, and a pair of exterior films formed by sealing the outer periphery of each other to form an inner space for accommodating the battery element. , portions corresponding to the outer edges of the negative electrode layer and the separator are deflected toward the positive electrode plate rather than portions corresponding to the body portions of the negative electrode layer and the separator. |