Active material for nonaqueous secondary battery and method for producing same

摘要

There is provided a method for producing an active material for a nonaqueous secondary battery, including firing an adherend in which a compound containing an element A (at least one element selected from among B, Al, Ga, In, Si, Ge, Sn, Mg and transition metal elements) is adhered to a particle surface of a material capable of being doped and dedoped with lithium ions, in a water-containing atmosphere so that weight increasing rate of the adherend is in a range of 0.1% by weight or more and 5.0% by weight or less, and firing the adherend.

主权项

1. A method for producing an active material for a nonaqueous secondary battery, comprising retaining an adherend in a water-containing atmosphere so that a weight increasing rate of the adherend is in a range of 0.1% by weight or more and 5.0% by weight or less, and then firing the adherend after retaining the adherend in the water-containing atmosphere,
wherein the adherend comprises a material capable of being doped and dedoped with lithium ions, and a compound containing at least one element (element A) selected from among B, Al, Ga, In, Si, Ge, Sn, Mg and transition metal elements, the compound is adhered to a particle surface of the material capable of being doped and dedoped with lithium ions, the compound has a BET specific surface area of twenty times or more as large as that of the material capable of being doped and dedoped with lithium ions, the temperature and humidity of the water-containing atmosphere is controlled, and the temperature of the water-containing atmosphere is in a range of 30° C. or more and 70° C. or less, and the relative humidity of the water-containing atmosphere is in a range of 50% or more and 80% or less.