45results about How to "High electromotive force" patented technology

A ferrite core comprising a sintered oxide containing at least 48.6 to 53.9 mol % of Fe on Fe2O3 basis, 12.3 to 35.2 mol % of Ni on NiO basis and 16.4 to 37.0 mol % of Zn on ZnO basis as metal elements, and contains a crystal phase comprising two or more kinds of solid solutions selected from NiFe2O4, ZnFe2O4 and FeFe2O4, wherein full width at half maximum of a diffraction peak, of crystal phase of which diffraction angle 2θ is in a range from 34.6 to 36.4° as measured by X-ray diffraction analysis using Cu—Kα beam, is 0.4° or less.

An Fe-Ni diffusion layer (3) is formed on the surface of a steel sheet (2) having an Fe content of not less than 98% by weight, while regulating the Fe / Ni ratio of the Fe-Ni diffusion layer (3) within the range of 0.1-2.5; and the resulting is formed into a battery can (1) having predetermined dimensions so that the Fe-Ni diffusion layer (3) serves as the inner surface of the can. When a battery is produced by using this battery can (1), the battery has excellent liquid leakage resistance by suppressing overdischarge erosion even when only a small amount of Ni is used therein.

A redox flow battery having a high electromotive force and capable of suppressing generation of a precipitation is provided. In a redox flow battery 100, a positive electrode electrolyte and a negative electrode electrolyte are supplied to a battery cell including a positive electrode 104, a negative electrode 105, and a membrane 101 interposed between the electrodes 104 and 105, to charge and discharge the battery. The positive electrode electrolyte contains a manganese ion, or both of a manganese ion and a titanium ion. The negative electrode electrolyte contains at least one type of metal ion selected from a titanium ion, a vanadium ion, a chromium ion, a zinc ion, and a tin ion. The redox flow battery 100 can suppress generation of a precipitation of MnO2, and can be charged and discharged well by containing a titanium ion in the positive electrode electrolyte, or by being operated such that the positive electrode electrolyte has an SOC of not more than 90%. In addition, the redox flow battery 100 can have a high electromotive force equal to or higher than that of a conventional vanadium-based redox flow battery.

An electrocatalyst for ethanol oxidization includes an elemental mixture containing platinum and ruthenium and at least one element, wherein the foregoing at least one element is selected from the group of tungsten, tin, molybdenum, copper, gold, manganese, and vanadium.

A redox flow battery in which a positive electrode electrolyte stored in a positive electrode tank and a negative electrode electrolyte stored in a negative electrode tank are supplied to a battery element to charge and discharge the battery is provided, the positive electrode electrolyte in the redox flow battery containing a Mn ion as a positive electrode active material, the negative electrode electrolyte containing at least one of a Ti ion, a V ion, and a Cr ion as a negative electrode active material, in which the redox flow battery includes a negative-electrode-side introduction duct in communication with inside of the negative electrode tank from outside thereof, for introducing oxidizing gas into the negative electrode tank, and a supply mechanism for supplying the oxidizing gas into the negative electrode tank via the negative-electrode-side introduction duct.

An anode is formed by a metal electrocatalyst including an element mixture made up of platinum and at least one of ruthenium and molybdenum as an active constituent which electrocatalyst is fabricated under vacuum using a vapor phase method, and in this way, the speed of electrode oxidation reaction of alcohol such as methanol, ethanol, and isopropyl alcohol may be substantially increased. Also, by using such an electrocatalyst as the anode, a direct alcohol fuel cell with a high output may be realized using alcohol that is not reformed as fuel.

The invention relates to a quantum carbon, comprising carbon particles with a particle size of 0.6-100nm, the carbon particles are single carbon and / or graphene particles, and the surface layer of the carbon particles contains carbon, hydrogen, Oxygen and nitrogen compounds, the compounds containing carbon, hydrogen, oxygen and nitrogen include condensed aromatic hydrocarbons, compounds containing carbon-oxygen single bonds, compounds containing carbon-oxygen double bonds, and compounds containing carbon-hydrogen bonds. The invention also discloses a quantum carbon solution, the quantum carbon solution is an aqueous solution containing quantum carbon, the ORP of the quantum carbon solution is 280mv-380mv, the conductivity σ is 1-5ms / cm, and the electromotive force It is 280mv~380mv, the pH value is 1.5-3.2, and the concentration is 0.1%-0.45%. The invention also discloses a device and a method for preparing the quantum carbon. The invention has the advantages of simple process, low cost, easy control, easy realization of large-scale production, no generation of three wastes, uniform particle size of produced carbon particles, and stable product quality.

The invention provides a high-capacity positive electrode active material capable of sufficiently exploiting the excellent characteristics of magnesium metal or the like as a negative electrode active material, such as high energy capacity; a method for producing the same; and an electrochemical device using the positive electrode active material. A positive electrode 11 includes a positive electrode can 1, a positive pole pellet 2 having a positive electrode active material and the like, and a metal mesh support 3. A negative electrode 12 includes a negative electrode cap 4 and a negative electrode active material 5 such as magnesium metal. The positive electrode pellet 2 and the negative electrode active material 5 are disposed so as to sandwich a separator 6, and an electrolyte 7 is injected into the separator 6. The positive electrode active material, which provides the feature of the invention, is synthesized by a step of reacting a permanganate, such as potassium permanganate, with hydrochloric acid preferably having a concentration of 3 to 4 mol / l to produce a precipitate, and a step of filtering the precipitate, thoroughly washing the filtered precipitate with water, and then subjecting the washed precipitate to heat treatment preferably at a temperature of 300 to 400° C. for not less than 2 hours, thereby giving a manganese oxide.