Taiheiyo Cement Corporation

Denso Corpora Tion

Denso Corporation

Takaaki Ogami

Hiroki Yamashita

Tomoki Hatsumori

Atsushi Nakamura

Satoru Suzuki

Shuhei Yoshida

Yuko Hirayama

Toshihito Shimada

The present invention provides a positive-electrode active material for a lithium-ion secondary cell or a sodium-ion secondary cell, which can effectively exhibit more excellent charge/discharge characteristics; and a method for manufacturing the positive-electrode active material. Namely, the present invention relates to a positive-electrode active material for a secondary cell comprising an oxide represented by formula (A): LiFeMnMPO, formula (B): LiFeMnMSiO, or formula (C): NaFeMnQPO; and carbon derived from a cellulose nanofiber supported thereon.

Positive-electrode active material for secondary cell, and method for manufacturing the same

A positive electrode active substance for a secondary cell, where the positive electrode active substance is capable of suppressing adsorption of water effectively in order to obtain a high-performance lithium ion secondary cell or sodium ion secondary cell. The positive electrode active substance contains 0.3 to 5 mass % of graphite, 0.1 to 4 mass % of carbon obtained by carbonizing a water-soluble carbon material, or 0.1 to 5 mass % of a metal fluoride is supported on a composite containing a compound which contains at least iron or manganese, where the compound is represented by formula (A) LiFeMnMPO, formula (B) LiFeMnNSiO, or formula (C) NaFeMnQPO, and carbon obtained by carbonizing a cellulose nanofiber.

Positive electrode active substance for secondary cell and method for producing same

The present invention provides a positive electrode active substance for a secondary cell, the positive electrode active substance capable of suppressing adsorption of water effectively in order to obtain a high-performance lithium ion secondary cell or sodium ion secondary cell. The present invention also provides a method for producing the positive electrode active substance for a secondary cell. That is, the present invention is a positive electrode active substance for a secondary cell, in which one or two selected from the group consisting of a water-insoluble electrically conductive carbon material and carbon obtained by carbonizing a water-soluble carbon material, and 0.1 to 5 mass % of a metal fluoride are supported on a compound containing at least iron or manganese, the compound represented by formula (A) LiFeMnMPO, formula (B) LiFeMnMSiO, or formula (C) NaFeMnQPO.

Secondary battery positive-electrode active material and method for producing same

There is provided a positive electrode active material composite for a lithium-ion secondary battery, in which, when using as a positive electrode active material of the lithium-ion secondary battery, it can effectively improve high-temperature cycle characteristics. In the positive electrode active material composite for a lithium-ion secondary battery, only on the surface of a lithium transition metal oxide secondary particle (A) composed of one or more of the lithium transition metal oxide particles represented by the following formula (I): LiNiCoMnMO. . . (I) or the following formula (II): LiNiCOAlMO. . . (II), a lithium-based polyanion particles (B) is composited with lithium transition metal oxide particles under a specific condition, the lithium-based polyanion particles (B) being represented by the following formula (III) or (III)': LiMnFeMPO. . . (III) or MnFeMPO. . . (III)&#x2032; and being supporting carbon (C) on a surface thereof.

Positive electrode active material complex for lithium-ion secondary battery, secondary battery using same, and method for producing positive electrode active material complex for lithium-ion secondary battery

The present invention provides a positive electrode active substance for a secondary cell, the positive electrode active substance capable of suppressing adsorption of water effectively in order to obtain a high-performance lithium ion secondary cell or sodium ion secondary cell. The present invention also provides a method for producing the positive electrode active substance for a secondary cell. That is, the present invention is a positive electrode active substance for a secondary cell, in which a water-insoluble electrically conductive carbon material and carbon obtained by carbonizing a water-soluble carbon material are supported on a compound containing at least iron or manganese, the compound represented by formula (A) LiFeMnMnMPO, formula (B) LiFeMnMSiO, or formula (C) NaFeMnQPO.

Secondary battery positive electrode active material and method for producing same

The present invention provides a positive-electrode active material for a lithium-ion secondary cell, which can effectively exhibit more excellent charge/discharge characteristics; and a method for manufacturing the positive-electrode active material. Namely, the present invention relates to a positive-electrode active material for a secondary cell comprising an oxide represented by formula (A): LifeMnMPO4; and carbon derived from a cellulose nanofiber supported thereon.

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Sakura, Japan

Takaaki Ogami