| abstract |
Provided is a non-aqueous lithium storage element capable of suppressing excessive decomposition of a lithium compound remaining in a positive electrode, suppressing gas generation under a high voltage, and suppressing a decrease in capacity in a high load charge / discharge cycle. To do. A non-aqueous lithium storage element of this embodiment is a non-aqueous lithium storage element having a positive electrode containing a lithium compound other than an active material, a negative electrode, a separator, and a non-aqueous electrolyte solution containing lithium ions. In the element mapping obtained by SEM-EDX on the positive electrode surface, the area overlap ratio U1 of fluorine mapping with respect to oxygen mapping binarized on the basis of the average value of luminance values is 40% or more and 99% or less. [Selection] Figure 1 |