TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: At least one portion of the electric-power generation portion is covered with cladding material (5) containing acid-resistant and basic-proof materials. The cladding material is obtained from polymer resin, material of carbon structure, amorphous carbon and/or glassy carbon. The reacting matter contains of the acid medium and the basic medium. The reacting substance contains the acid medium and the basic medium, and is hydrogen peroxide. The electrodes (1,3) are obtained from carbon structure, amorphous carbon and/or glassy carbon. The electrodes (1,3) are plate shape, shape of thin film, mesh shape or fibrous form. The acid medium contains aqueous acid containing acid such as sulfuric acid, methanesulfonic acid, hydrochloric acid, hydroiodic acid, hydrobromic acid, perchloric acid, periodic acid, orthophosphoric acid, polyphosphoric acid, tetra fluoroboric acid, hydrogen hexafluorosilicate, hexafluoro phosphate, acetic acid, citric acid, oxalic acid, salicyclic acid, tartaric acid, maleic acid, malonic acid, phthalic acid and/or fumaric acid. The basic medium contains basic aqueous solution containing base such as sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, magnesium hydroxide, ammonium hydroxide, hydrated tetramethyl ammonium, hydrated tetraethylammonium, hydrated tetrapropyl ammonium and/or hydrated tetrabutylammonium, and alkali-metal salt such as sodium carbonate, sodium hydrogencarbonate, potassium carbonate, potassium hydrogencarbonate, sodium borate, potassium borate, potassium silicate, sodium tripolyphosphate, potassium tripolyphosphate, sodium aluminate and/or potassium aluminate. The acid medium is obtained from acidic ion-exchange component or acidic ionic conductive gel, and the basic medium is obtained from basic ion-exchange component or basic ionic conductive gel. The acid medium is paste containing aqueous acid and carbon-type powder. The basic medium is paste containing basic aqueous solution and carbon-type powder. Preferred Process: The reacting substance produces liquid or solid containing reacting substance by chemical change. The electrodes (1,3) are arranged on the acid medium and the basic medium by non-electrolytic plating, vapor deposition method or sputtering method. A separator is provided between the acid medium and the basic medium of the electric-power generation portion.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: At least one portion of the electric-power generation portion is covered with cladding material (5) containing acid-resistant and basic-proof materials. The cladding material is obtained from polymer resin, material of carbon structure, amorphous carbon and/or glassy carbon. The reacting matter contains of the acid medium and the basic medium. The reacting substance contains the acid medium and the basic medium, and is hydrogen peroxide. The electrodes (1,3) are obtained from carbon structure, amorphous carbon and/or glassy carbon. The electrodes (1,3) are plate shape, shape of thin film, mesh shape or fibrous form. The acid medium contains aqueous acid containing acid such as sulfuric acid, methanesulfonic acid, hydrochloric acid, hydroiodic acid, hydrobromic acid, perchloric acid, periodic acid, orthophosphoric acid, polyphosphoric acid, tetra fluoroboric acid, hydrogen hexafluorosilicate, hexafluoro phosphate, acetic acid, citric acid, oxalic acid, salicyclic acid, tartaric acid, maleic acid, malonic acid, phthalic acid and/or fumaric acid. The basic medium contains basic aqueous solution containing base such as sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, magnesium hydroxide, ammonium hydroxide, hydrated tetramethyl ammonium, hydrated tetraethylammonium, hydrated tetrapropyl ammonium and/or hydrated tetrabutylammonium, and alkali-metal salt such as sodium carbonate, sodium hydrogencarbonate, potassium carbonate, potassium hydrogencarbonate, sodium borate, potassium borate, potassium silicate, sodium tripolyphosphate, potassium tripolyphosphate, sodium aluminate and/or potassium aluminate. The acid medium is obtained from acidic ion-exchange component or acidic ionic conductive gel, and the basic medium is obtained from basic ion-exchange component or basic ionic conductive gel. The acid medium is paste containing aqueous acid and carbon-type powder. The basic medium is paste containing basic aqueous solution and carbon-type powder. Preferred Process: The reacting substance produces liquid or solid containing reacting substance by chemical change. The electrodes (1,3) are arranged on the acid medium and the basic medium by non-electrolytic plating, vapor deposition method or sputtering method. A separator is provided between the acid medium and the basic medium of the electric-power generation portion.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The ion-exchange component is polyvinyl styrene-group ion exchange resin, polyfluoro hydrocarbon polymer-type polymeric electrolyte film, polyvinyl styrene-type ion-exchange membrane or fibrous polystyrene-type ion-exchange filter paper. The acidic ionic conductive gel is obtained by gelatinizing aqueous acid using crosslinked polyacrylic acid, agar or its salts. The basic ionic conductive gel is obtained by gelatinizing basic aqueous solution using carboxymethylcellulose, crosslinked polyacrylic acid or its salts.