Abstract: Provided is a method of producing an electrode material precursor having a core-shell structure in which the particle size is extremely small and the particle diameter is uniform, and a method of efficiently producing an electrode material using the obtained precursor. The method is for producing an electrode material precursor having a core-shell structure in which an active material core is coated with polyaniline, wherein an oxidizing agent is added to a solution containing aniline and an active raw material to generate fine active material particles, and aniline is polymerized at the surface of the fine particles. An electrode material having a core-shell structure in which an active material core is coated with carbon is produced by subjecting the electrode material precursor obtained in the foregoing production method to heat treatment in a reduction atmosphere at 300 to 900° C.

Abstract: A lithium secondary cell, having: a negative electrode, a negative electrode-electrolyte solution, a separator, a positive electrode-electrolyte solution, and a positive electrode, which are disposed in this order, in which the separator is a solid electrolyte through which only lithium ions pass.

Abstract: Provided is a method of producing an electrode material precursor having a core-shell structure in which the particle size is extremely small and the particle diameter is uniform, and a method of efficiently producing an electrode material using the obtained precursor. The method is for producing an electrode material precursor having a core-shell structure in which an active material core is coated with polyaniline, wherein an oxidizing agent is added to a solution containing aniline and an active raw material to generate fine active material particles, and aniline is polymerized at the surface of the fine particles. An electrode material having a core-shell structure in which an active material core is coated with carbon is produced by subjecting the electrode material precursor obtained in the foregoing production method to heat treatment in a reduction atmosphere at 300 to 900° C.

Abstract: The present invention aims to realize (1) manufacture of a mesoporous composite powder or thin film composed of nanocrystalline metal oxide—glass having a three-dimensional structure with a large specific surface area, (2) construction of a porous structure framework with nanocrystalline metal oxide crystal and a slight amount of glass phase (SiO2 or P2O5, B2O3), (3) control of crystal growth of metal oxide with a slight amount of glass phase (SiO2 or P2O5, B2O3), (4) simplification of the manufacturing process, and (5) use thereof in manufacture of a lithium intercalation electric device, photocatalytic device, solar battery and energy storage device. Provided are a nanocrystal oxide—glass mesoporous composite powder or thin film having a three-dimensional structure with regularly arranged mesopores, and a secondary battery comprising the same.

Abstract: A formaldehyde detector (10) includes a detection reagent that produces a color by reaction with formaldehyde. The detector (10) further includes a detection element (30) including: a base material (31) constituting an optical waveguide through which light propagates while repeating total reflection; and a mesoporous layer (32) that is formed on at least part of a light-reflecting surface constituting a surface of the base material (31) and carries the detection reagent. The detector (10) further includes: a light emitter for emitting light to the base material (31); and a light receiver for receiving light emitted from the base material (31). In addition, the detector (10) includes a signal processing part.

Abstract: The present invention aims to realize (1) manufacture of a mesoporous composite powder or thin film composed of nanocrystalline metal oxide-glass having a three-dimensional structure with a large specific surface area, (2) construction of a porous structure framework with nanocrystalline metal oxide crystal and a slight amount of glass phase (SiO2 or P2O5, B2O3), (3) control of crystal growth of metal oxide with a slight amount of glass phase (SiO2 or P2O5, B2O3), (4) simplification of the manufacturing process, and (5) use thereof in manufacture of a lithium intercalation electric device, photocatalytic device, solar battery and energy storage device. Provided are a nanocrystal oxide-glass mesoporous composite powder or thin film having a three-dimensional structure with regularly arranged mesopores, and a secondary battery comprising the same.

Abstract: A carbon fine powder is obtained by uniformly coating the surface of a carbon fine powder having a large specific surface area with a uniform thin film layer of a metal oxide, metal nitride or metal carbide as an electrode active substance material through induction of a sonochemical reaction. It is found that the obtained carbon fine powder has a low electrical resistance and shows a rapid faradaic process (pseudo-capacitance) of the surface coating layer. The coated carbon fine powder, a process for producing the same, and a supercapacitor and a secondary battery using the carbon fine powder are disclosed.