Patent application number | Description | Published |
20140285153 | METHOD FOR OPERATING MOLTEN SALT BATTERY - Provided is a method for operating a molten salt battery having a sodium compound (NaCrO | 09-25-2014 |
20150229001 | MOLTEN SALT COMPOSITION AND SECONDARY BATTERY USING THE MOLTEN SALT COMPOSITION - As a molten salt composition lacking a clear melting point and including a molten salt that can be suitably used as an electrolytic solution of a secondary battery, there is provided a molten salt composition including a mixture of two or more kinds of molten salts which can be used as an electrolytic solution of a secondary battery. Particularly, provided is a molten salt composition comprising two kinds of molten salts each having cations with ion diameters different from each other, composition ratio being set to a composition ratio within a range in which the molten salt composition lacks a melting point. Also provided is a secondary battery including the molten salt composition as an electrolytic solution, which can maintains an available state even when the temperature becomes low without rapidly becoming unavailable. | 08-13-2015 |
20150229004 | HEAT RESISTANT BATTERY AND METHOD FOR CHARGING AND DISCHARGING THE SAME - A heat resistant battery includes a positive electrode including a positive electrode current collector and a positive electrode active material fixed on the positive electrode current collector, wherein the positive electrode active material includes a sodium-containing transition metal compound capable of electrochemically storing and releasing a sodium ion; a negative electrode including a negative electrode current collector and a negative electrode active material fixed on the negative electrode current collector, wherein the negative electrode active material contains at least one selected from the group consisting of a sodium-containing titanium compound and a non-graphitizable carbon, each of the sodium-containing titanium compound and the non-graphitizable carbon capable of storing and releasing a sodium ion at a lower potential than a potential of the sodium-containing transition metal compound; and a sodium ion-conductive electrolyte provided at least between the positive electrode and the negative electrode, wherein the sodium ion-conductive electrolyte includes a salt of an organic cation having a pyrrolidinium skeleton and a bis(perfluoroalkyl sulfonyl)imide anion. | 08-13-2015 |
20150249272 | SODIUM SECONDARY BATTERY - The present invention relates to a sodium secondary battery comprising a positive electrode which includes a positive electrode current collector and a positive electrode material, the positive electrode material being carried on the positive electrode current collector, wherein the positive electrode material comprises a positive electrode active material reversibly containing sodium cation; a negative electrode which includes a negative electrode current collector and a negative electrode material, the negative electrode material being carried on the negative electrode current collector, wherein the negative electrode material comprises a negative electrode active material reversibly containing sodium cation; an electrolyte interposed at least between the positive electrode and the negative electrode; and a separator for retaining the electrolyte and separating the positive electrode and the negative electrode from each other; wherein the negative electrode active material is amorphous carbon, and the electrolyte is a molten salt electrolyte which is a mixture of a salt composed of sodium cation and an anion and a salt composed of an organic cation and an anion. | 09-03-2015 |
20150295279 | MOLTEN SALT BATTERY AND METHOD FOR PRODUCING SAME - A molten salt battery comprising a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte, wherein the electrolyte includes a molten salt, the molten salt contains at least sodium ions, and the moisture content We1 in the molten salt is 300 ppm or less in terms of mass ratio. | 10-15-2015 |
20150372308 | ELECTRODE FOR SODIUM MOLTEN-SALT BATTERY AND SODIUM MOLTEN-SALT BATTERY - Provided is an electrode for a sodium molten-salt battery in which degradation of the electrode can be suppressed even when charging and discharging are repeated, and which has excellent cycle characteristics. The electrode for a sodium molten-salt battery includes a current collector and an electrode mixture adhering to a surface of the current collector, in which the electrode mixture includes an electrode active material and a binder containing a polymer, and the polymer does not contain a fluorine atom. The polymer can include, for example, at least one selected from the group consisting of polyamide resins and polyimide resins or at least one selected from the group consisting of acrylic resins, rubber-like polymers, and cellulose derivatives. | 12-24-2015 |
20160049694 | POSITIVE ELECTRODE ACTIVE MATERIAL FOR SODIUM MOLTEN SALT BATTERIES, POSITIVE ELECTRODE FOR SODIUM MOLTEN SALT BATTERIES, AND SODIUM MOLTEN SALT BATTERY - A positive electrode active material for sodium molten salt batteries includes a sodium-containing metal oxide that can electrochemically intercalate and deintercalate sodium ions, wherein a ratio by mass of sodium carbonate is 500 ppm or less. A ratio by mass of sodium carbonate in the positive electrode active material is more preferably 100 ppm or less. | 02-18-2016 |
20160079632 | MOLTEN-SALT ELECTROLYTE AND SODIUM MOLTEN-SALT BATTERY - Provided are a molten-salt electrolyte having good charge-discharge cycle characteristics and a sodium molten-salt battery using the same. The molten-salt electrolyte contains an ionic liquid whose ultraviolet-visible absorption spectrum does not have an absorption peak attributable to impurities in a wavelength range of 200 to 500 nm, and a sodium salt. The sodium molten-salt battery includes a positive electrode that contains a positive electrode active material, a negative electrode that contains a negative electrode active material, and the molten-salt electrolyte. The ionic liquid is preferably a salt of an organic onium cation and a bis(sulfonyl)imide anion. | 03-17-2016 |
20160111752 | SODIUM MOLTEN-SALT BATTERY AND MOLTEN-SALT ELECTROLYTE OR IONIC LIQUID USED THEREIN - Provided is a sodium molten-salt battery having good storage characteristics and good charge-discharge cycle characteristics. The sodium molten-salt battery includes a positive electrode that contains a positive electrode active material, a negative electrode that contains a negative electrode active material, and a molten-salt electrolyte that contains a sodium salt and an ionic liquid that dissolves the sodium salt. The ionic liquid contains a salt of an anion and a pyrrolidinium cation having, at the 1-position, a methyl group and an alkyl group having 2 to 5 carbon atoms. A content of 1-methylpyrrolidine in the molten-salt electrolyte is 100 ppm by mass or less. | 04-21-2016 |