Inorganic monodisperse spherical fine particles, method for producing inorganic monodisperse spherical fine particles, battery electrode and battery

摘要

PROBLEM TO BE SOLVED: To provide inorganic monodisperse spherical fine particles which are characterized in that diameters thereof are 10 nm to 5 μm and they have a spinel type crystal structure, and to provide a production method thereof.SOLUTION: In a membrane emulsification process in which anode oxidation porous alumina having a hole array structure comprising arrangement of pores with uniform sizes in nanometer scale is used as an emulsification membrane, an aqueous solution in which a metal salt is dissolved in addition to a water-soluble monomer or oligomer and a polymerization initiator is used as a dispersion phase, and an oil phase to which a surfactant is added is used as a continuous phase. Precursor fine particles are produced by extruding the dispersion phase into the continuous phase via the porous alumina membrane so as to form liquid droplets, and subsequently polymerizing and solidifying the obtained liquid droplets. Spherical fine particles having a spinel type crystal structure can be produced by subjecting the obtained precursor fine particles to calcination treatment as post treatment.SELECTED DRAWING: None