Abstract: A positive electrode capable of intercalating and deintercalating lithium ions, a negative electrode capable of intercalating and deintercalating lithium ions, and a solid electrolyte having lithium ion conductivity are provided. In addition, the solid electrolyte includes an inorganic compound and a polymer.

Abstract: A lithium secondary battery includes: a positive electrode film formed on a transparent substrate having flexible electron conductivity and containing a substance capable of performing a redox reaction with lithium ions; a transparent electrolyte having lithium ion conductivity; and a negative electrode film formed on a transparent substrate having flexible electron conductivity and containing an organic radical species capable of performing a redox reaction with lithium ions.

Abstract: An image forming apparatus comprises: a photosensitive member that revolvably moves in a moving direction; an exposure device that exposes a surface of the photosensitive member to a light beam which is controllably activated according to an image signal and scanned on the surface of the photosensitive member in a scanning direction perpendicular to the moving direction thereof, thereby forming an electrostatic latent image on the photosensitive member in correspondence to the image signal; a developing device that develops the electrostatic latent image with a toner to form a toner image; and a toner consumption calculator that counts the number of dots constituting the toner image based on the image signal and calculates a quantity of toner consumed by the developing device based on the resultant count value, wherein the toner consumption calculator calculates a toner consumption based on the count value of the dots weighted according to the number of consecutive dots in the scanning direction, and the magn