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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11646405 B1

PDFFull Text
Date of Patent:
May. 09, 2023

Filed:

Sep. 17, 2015

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

Applicant:

Taiheiyo Cement Corporation, Minato-ku, JP;

Inventors:

Hiroki Yamashita, Sakura, JP;

Tomoki Hatsumori, Sakura, JP;

Atsushi Nakamura, Sakura, JP;

Takaaki Ogami, Sakura, JP;

Assignee:

TAIHEIYO CEMENT CORPORATION, Minato-ku, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

William D Young

Int. Cl.
CPC ...
H01M 4/133 (2010.01); H01M 4/04 (2006.01); H01M 4/62 (2006.01); H01M 4/36 (2006.01); H01M 4/1397 (2010.01); C01B 33/20 (2006.01); H01M 4/1393 (2010.01); C01B 25/45 (2006.01); C01B 33/32 (2006.01); H01M 4/136 (2010.01); H01M 4/58 (2010.01); H01M 4/587 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/133 (2013.01); C01B 25/45 (2013.01); C01B 33/20 (2013.01); C01B 33/32 (2013.01); H01M 4/0471 (2013.01); H01M 4/136 (2013.01); H01M 4/1393 (2013.01); H01M 4/1397 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/582 (2013.01); H01M 4/587 (2013.01); H01M 4/5825 (2013.01); H01M 4/62 (2013.01); H01M 4/625 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01);
Abstract

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.

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