Abstract: A fuel cell system (101) comprising a fuel cell (120) and a reaction container (103), wherein the fuel cell (120) comprises a fuel electrode (121), an air electrode (122) and an electrolyte film (123) and the reaction container (103) comprises a hydrogen storage material (106) and a heater (114) and can supply hydrogen to the fuel cell (120), and wherein a water flow path (109) for supplying water produced in the air electrode (122) to the reaction container (103) is provided.

Abstract: Disclosed is a fuel cell system (101) having: a reaction container (103) that has a first heater (114); and a fuel cell (120) provided with a fuel electrode (121), an oxygen electrode (122), and an electrolyte membrane (123); wherein the reaction container (103) is attachable to/removable from the fuel cell (120).

Abstract: A fuel cell system (101) comprising a fuel cell (120) and a reaction container (103), wherein the fuel cell (120) comprises a fuel electrode (121), an air electrode (122) and an electrolyte film (123) and the reaction container (103) comprises a hydrogen storage material (106) and a heater (114) and can supply hydrogen to the fuel cell (120), and wherein a water flow path (109) for supplying water produced in the air electrode (122) to the reaction container (103) is provided.

Abstract: A method is provided for driving an electrochemical display element. An apparatus employing the method is also provided. The method comprises a blackening step for depositing a metal by applying a blackening pulse to a pixel of the electrochemical device, and a whitening step for dissolving the deposited metal by application of a whitening pulse. When the display at the electrochemical display device is being updated, the duration time of application and/or voltage of application of the whitening pulse is adjusted in accordance with the time elapsed since the deposition of the metal in the blackening step before the update in the whitening step. This method enables sufficient whitening of the pixel of the electrochemical display device, excellent durability, and shortening of the time for update.

Abstract: Objective lens 10 as an optical element of the present invention exhibits excellent optical stability maintained for a long duration. Disclosed is a resin composition constituting the optical element contains a thermoplastic resin, a curable resin, and inorganic particles having an average particle diameter of 1-50 nm.