| abstract |
The present invention provides a non-aqueous lithium storage element, which includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte, the positive electrode has a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer includes activated carbon, and has the following structure ( 1) and/or (2): (1) the negative electrode comprises a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer comprises a carbon material, and in the binarized image of the SEM image captured on the surface of the negative electrode active material layer, When the set of the largest inscribed circles enclosed by each pixel is expressed in the form of the frequency distribution of each diameter for all the pixels in the bright field area, the total area of the largest inscribed circles with diameters less than 100 nm is the total area of the largest inscribed circles (2) The non-aqueous electrolyte solution contains: (A) LiPF 6 and/or LiBF 4 , (B) imide-based lithium salt, and (C) oxalic acid complex For the lithium salt, the ratio of the mass of the (C) component in the non-aqueous electrolyte solution to the total mass of the (A) component and the (B) component is 1.0 to 10.0 mass %. |