Nonaqueous lithium power storage element
Abstract:
Provided is a nonaqueous lithium power storage element that can suppress excessive decomposition of a lithium compound remaining in a positive electrode, can suppress gas generation at high voltages, and can suppress capacity declines during high-load charge/discharge cycling. The nonaqueous lithium power storage element according to the present embodiment has a positive electrode that contains a lithium compound other than an active material, a negative electrode, a separator, and a lithium ion-containing nonaqueous electrolyte, wherein in the elemental map provided by SEM-EDX of the surface of the positive electrode, the area overlap ratio U1 of the fluorine map relative to the oxygen map, as provided by binarization based on the average value of the brightness values, is 40% to 99%.
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