Kabushiki Kaisha Toyota Jidoshokki

Ryota Isomura

Hitotoshi Murase

Naoto Yasuda

A production process for composite oxide expressed by a compositional formula: LiMnAO, where 'A' is one or more kinds of metallic elements other than Mn; and 0&#x2266;'x'&#x3c;1, obtained by preparing a raw-material mixture by mixing a metallic-compound raw material and a molten-salt raw material with each other, the metallic-compound raw material at least including an Mn-containing nitrate that includes one or more kinds of metallic elements in which Mn is essential, the molten-salt raw material including lithium hydroxide and lithium nitrate, and exhibiting a proportion of the lithium nitrate with respect to the lithium hydroxide (Lithium Nitrate/Lithium Hydroxide) that falls in a range of from 1 or more to 3 or less by molar ratio; reacting the raw-material mixture at 500&#xb0; C. or less by melting it; and recovering the composite oxide being generated from the raw-material mixture that has undergone the reaction.

Production process for composite oxide, positive-electrode active material for lithium-ion secondary battery and lithium-ion secondary battery

A composite oxide is produced via the following: a raw-material mixture preparation step of preparing a raw-material mixture by mixing a metallic-compound raw material and a molten-salt raw material with each other, the metallic-compound raw material at least including one or more kinds of Mn-containing metallic compounds being selected from the group consisting of oxides, hydroxides and metallic salts that include one or more kinds of metallic elements in which Mn is essential, the molten-salt raw material including lithium hydroxide and lithium nitrate, and exhibiting a proportion of the lithium hydroxide with respect to the lithium nitrate (i.e., (Lithium Hydroxide)/(Lithium Nitrate)) that falls in a range of from 0.05 or more to less than 1 by molar ratio; a molten reaction step of reacting said raw-material mixture at from 300&#xb0; C. or more to 550&#xb0; C. or less by melting it: and a recovery step of recovering said composite oxide being generated from said raw-material mixture that has undergone the reaction.

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Kariya, Japan

Ryota Isomura