Abstract: In a process for producing an electrode of a nonaqueous electrolyte battery, an electrode and a polymer paste are prepared. The electrode is made of a metal as a current collector and an active material layer thereon. The polymer paste has a polymer dissolved in a solvent soluble in water. The polymer paste is allowed to be held in the electrode. Thereafter, the solvent is extracted from the polymer paste with an aqueous solution containing an alcohol, phosphorous or phosphorous compound.

Abstract: The present invention can provide the nonaqueous electrolytic secondary battery excellent in cycle life characteristics and characteristics in discharge at a high rate as well as in safety in overcharge without reducing the discharge capacity by using the positive active material, which is obtained from starting materials containing Na and S by a simple production step such as water-washing treatment after synthesis and which contains less than 0.1% by weight of the sulfate group (SO42−), less than 0.024% by weight of Na and/or less than 0.13% by weight of lithium sodium sulfate (LiNaSO4).