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公开(公告)号：US20220359884A1
公开(公告)日：2022-11-10
申请号：US17660194
申请日：2022-04-21
Applicant: FDK CORPORATION
Inventor： Minori Inoue , Takeshi Kajiwara , Shohei Unoki , Takahiro Endo , Shigekazu Yasuoka , Yoshikatsu Watanabe
Abstract: A battery includes: an electrode group including an air electrode and a negative electrode that are stacked with a separator interposed therebetween; and a container housing the electrode group together with an alkaline electrolyte liquid. The air electrode includes a catalyst for an air electrode. This catalyst for an air electrode is a catalyst for an air electrode including an oxide containing at least bismuth (Bi), ruthenium (Ru), sodium (Na), and oxygen, and Na/(Ru+Bi+Na) representing an atomic ratio of the sodium to a sum of the bismuth, the ruthenium, and the sodium is 0.126 or more and 0.145 or less.
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公开(公告)号：US11811069B2
公开(公告)日：2023-11-07
申请号：US17660194
申请日：2022-04-21
Applicant: FDK CORPORATION
Inventor： Minori Inoue , Takeshi Kajiwara , Shohei Unoki , Takahiro Endo , Shigekazu Yasuoka , Yoshikatsu Watanabe
CPC classification number: H01M4/8615 , H01M4/9016 , H01M4/9075 , H01M10/26 , H01M2004/027 , H01M2004/8689 , H01M2300/0014
Abstract: A battery includes: an electrode group including an air electrode and a negative electrode that are stacked with a separator interposed therebetween; and a container housing the electrode group together with an alkaline electrolyte liquid. The air electrode includes a catalyst for an air electrode. This catalyst for an air electrode is a catalyst for an air electrode including an oxide containing at least bismuth (Bi), ruthenium (Ru), sodium (Na), and oxygen, and Na/(Ru+Bi+Na) representing an atomic ratio of the sodium to a sum of the bismuth, the ruthenium, and the sodium is 0.126 or more and 0.145 or less.
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Patent Agency Ranking
公开(公告)号：US20230049091A1
公开(公告)日：2023-02-16
申请号：US17813566
申请日：2022-07-19
Applicant: FDK CORPORATION
Inventor： Shohei Unoki , Takeshi Kajiwara , Minori Inoue , Takahiro Endo , Shigekazu Yasuoka , Yoshikatsu Watanabe
Abstract: A battery includes: an electrode group including an air electrode and a negative electrode that are stacked with a separator interposed therebetween; and a container housing the electrode group together with an alkaline electrolyte liquid. The air electrode includes a catalyst for an air secondary battery, and this catalyst for an air secondary battery includes a pyrochlore bismuth-ruthenium composite oxide having a full width at half maximum of a diffraction peak corresponding to a (222) face obtained by a powder X-ray diffraction method using CuKα rays as X-rays, of 0.350 deg or larger and 0.713 deg or smaller.
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公开(公告)号：US11495804B2
公开(公告)日：2022-11-08
申请号：US16781192
申请日：2020-02-04
Applicant: FDK CORPORATION , JAPAN METALS AND CHEMICALS CO., LTD.
Inventor： Shohei Unoki , Takeshi Kajiwara , Takahiro Endo , Shigekazu Yasuoka , Yoshikatsu Watanabe
Abstract: An air electrode catalyst for an air secondary battery includes a pyrochlore-type composite oxide having two or more crystal structures having a different amount of oxygen. A battery, according to some embodiments, includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and a container accommodating the electrode group along with an alkali electrolyte solution, wherein the air electrode includes the air electrode catalyst. The air electrode catalyst may have a pyrochlore-type composite oxide having a crystal structure represented by Bi2Ru2O6.92 and a crystal structure represented by Bi2Ru2O7.33.
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公开(公告)号：US11322751B2
公开(公告)日：2022-05-03
申请号：US16981275
申请日：2019-03-25
Applicant: FDK CORPORATION
Inventor： Shohei Unoki , Takeshi Kajiwara , Takahiro Endo , Shigekazu Yasuoka , Yoshikatsu Watanabe
Abstract: A battery includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and an accommodating bag accommodating the electrode group along with an alkali electrolyte solution. The air electrode includes a catalyst for an air secondary battery. This catalyst for an air secondary battery is produced by a method for producing a catalyst for an air secondary battery, the method including a precursor preparation step of preparing a bismuth-ruthenium oxide precursor, a calcination step of calcining the bismuth-ruthenium oxide precursor obtained in this precursor preparation step to form a bismuth-ruthenium oxide, and a nitric acid treatment step of immersing the bismuth-ruthenium oxide obtained by this calcination step in a nitric acid aqueous solution.
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公开(公告)号：US20210043945A1
公开(公告)日：2021-02-11
申请号：US16981275
申请日：2019-03-25
Applicant: FDK CORPORATION
Inventor： Shohei Unoki , Takeshi Kajiwara , Takahiro Endo , Shigekazu Yasuoka , Yoshikatsu Watanabe
Abstract: A battery includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and an accommodating bag accommodating the electrode group along with an alkali electrolyte solution. The air electrode includes a catalyst for an air secondary battery. This catalyst for an air secondary battery is produced by a method for producing a catalyst for an air secondary battery, the method including a precursor preparation step of preparing a bismuth-ruthenium oxide precursor, a calcination step of calcining the bismuth-ruthenium oxide precursor obtained in this precursor preparation step to form a bismuth-ruthenium oxide, and a nitric acid treatment step of immersing the bismuth-ruthenium oxide obtained by this calcination step in a nitric acid aqueous solution.
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公开(公告)号：US20200251746A1
公开(公告)日：2020-08-06
申请号：US16781192
申请日：2020-02-04
Applicant: FDK CORPORATION , JAPAN METALS AND CHEMICALS CO., LTD.
Inventor： Shohei Unoki , Takeshi Kajiwara , Takahiro Endo , Shigekazu Yasuoka , Yoshikatsu Watanabe
Abstract: An air electrode catalyst for an air secondary battery includes a pyrochlore-type composite oxide having two or more crystal structures having a different amount of oxygen. A battery, according to some embodiments, includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and a container accommodating the electrode group along with an alkali electrolyte solution, wherein the air electrode includes the air electrode catalyst. The air electrode catalyst may have a pyrochlore-type composite oxide having a crystal structure represented by Bi2Ru2O6.92 and a crystal structure represented by Bi2Ru2O7.33.
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