METHOD FOR PRODUCING SURFACE-TREATED OXIDE PARTICLES, AND OXIDE PARTICLES PRODUCED BY SAID PRODUCTION METHOD

摘要

Provided is a method for producing surface-treated oxide particles which can be used in an active-material layer for a positive electrode or a negative electrode in a storage battery. Oxide particles in which an alkaline compound is contained in a part or the whole area of the surface of each of the particles are brought into contact with a gas containing a volatile acidic compound to produce a neutralization product by a gas phase reaction, thereby producing surface-treated oxide particles in which the neutralization product is contained. The alkaline compound comprises at least one compound selected from compounds respectively containing lithium (Li), sodium (Na) and magnesium (Mg), the volatile acidic compound comprises at least one compound selected from compounds respectively containing boron (B), phosphorus (P) and silicon (Si), and the oxide particles comprise an alkali-composited oxide containing at least one transition metal selected from manganese, cobalt, nickel, iron and titanium.

主权项

1. A method of manufacturing surface-treated oxide particles, the oxide particles each comprising a secondary particle formed with primary particles, and a neutralization product being formed on a surface of the secondary particle and on a surface exposed to the side of an open pore between the primary particles, the surface exposed to the side of an open pore between the primary particles being a portion of surfaces of the primary particles inside the secondary particle, the method comprising:
contacting oxide particles have an alkali compound on the particle surface with a gas comprising a volatile acidic compound, and forming the neutralization product by a reaction of the alkaline compound with the acidic compound in the gas phase, wherein the alkaline compound is any one or more selected from the group of compounds containing lithium (Li), sodium (Na), magnesium (Mg), and the volatile acidic compound is any one or more selected from the group of compounds containing boron (B) phosphorus (P), silicon (Si), and the oxide particles are of an alkali composite oxide comprising any one or more transition metals selected from the group of manganese, cobalt, nickel, iron, titanium, and comprising any one or more alkali elements selected from the group of lithium (Li), sodium (Na), magnesium (Mg).