Panasonic Intellectual Property Management Co., Ltd.

Yuji Goshima

Takeshi Ogasawara

Akihiro Kawakita

Yoshinori Aoki

Takaya Tochio

This positive electrode active substance for a non-aqueous electrolyte secondary battery contains: a lithium-containing transition metal oxide having secondary particles formed by aggregation of primary particles; and at least a tungsten compound and a boron compound that are present between primary particles. The present invention is characterized in that: the amount of tungsten element eluted when the positive electrode active substance is washed for 5 minutes with a 0.01 mol/L aqueous solution of sodium hydroxide is 60% or less of the amount of tungsten element detected when the positive electrode active substance is dissolved in a mixed acid containing hydrofluoric acid, nitric acid and hydrochloric acid; and the amount of boron element eluted when the positive electrode active substance is washed for 1 minute with ion exchanged water is 80% or more of the amount of boron element detected when the positive electrode active substance is dissolved in hydrochloric acid.

Positive electrode active substance for non-aqueous electrolyte secondary battery, and positive electrode for non-aqueous electrolyte secondary battery

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Osaka, Japan

Yuji Goshima