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公开(公告)号：US20190190083A1
公开(公告)日：2019-06-20
申请号：US16219710
申请日：2018-12-13
申请人： FDK CORPORATION
发明人： Yuzo Imoto , Yuya Tanimoto , Tetsuya Yamane , Masaru Kihara
CPC分类号： H01M10/345 , H01M2/022 , H01M2/0285 , H01M4/383 , H01M4/52 , H01M2004/021 , H01M2004/028 , H01M2300/0014
摘要： A nickel hydrogen secondary battery 2 has an outer can 10, and an electrode group 22 accommodated together with an alkali electrolyte solution in the outer can 10. The electrode group 22 includes a positive electrode 24 and a negative electrode 26 stacked through a separator 28. The positive electrode 24 includes a first positive electrode active substance and a second positive electrode active substance. These first and second positive electrode active substances each contain nickel hydroxide as a main component, and the first positive electrode active substance and the second positive electrode active substance differ in the amount of magnesium solid-dissolved.
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公开(公告)号：US20180114981A1
公开(公告)日：2018-04-26
申请号：US15561843
申请日：2016-03-10
申请人： FDK CORPORATION
发明人： Jun Ishida , Masaru Kihara , Akira Saguchi , Yusuke Shingai , Takuya Kai , Takeshi Kajiwara
摘要： A nickel-hydrogen secondary battery includes an electrode group that includes a separator, a positive electrode and a negative electrode, and the negative electrode contains a hydrogen storage alloy having a crystal structure in which an AB2 type unit and an AB5 type unit are laminated, in which a PCT characteristic diagram at 80° C. includes a first plateau region having a hydrogen pressure Pd1 when hydrogen is stored by 0.25 times an effective hydrogen storage amount that is a hydrogen storage amount when a hydrogen pressure is 1 MPa, and a second plateau region having a hydrogen pressure Pd2 when hydrogen is stored by 0.70 times the effective hydrogen storage amount, and Pd1 and Pd2 satisfy a relation of 0.6≤log10(Pd2/Pd1).
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公开(公告)号：US20170110764A1
公开(公告)日：2017-04-20
申请号：US15317106
申请日：2015-06-23
申请人： FDK CORPORATION
发明人： Masaru Kihara , Akira Saguchi , Yusuke Shingai , Jun Ishida , Takuya Kai
摘要： A nickel hydrogen secondary battery accommodates an electrode group including a positive electrode and a negative electrode which are stacked one on top of another through a separator, together with an alkaline electrolyte. The battery contains Li, with a total amount of Li in the battery 2 of 15 to 50 mg/Ah, as determined as the mass in terms of LiOH per Ah of the positive electrode capacity. The negative electrode includes particles of rare earth-Mg—Ni-based hydrogen storage alloy which contains a rare earth element, Mg and Ni. The hydrogen storage alloy particles 44 includes, on the surface thereof, a rare earth hydroxide which is the hydroxide of a rare earth element and has a specific surface area of 0.1 to 0.5 m2/g.
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公开(公告)号：US11817573B2
公开(公告)日：2023-11-14
申请号：US17446285
申请日：2021-08-27
申请人： FDK CORPORATION
发明人： Shota Ohata , Jun Ishida , Yuki Ehara , Masaru Kihara
IPC分类号： H01M10/00 , H01M4/134 , C22C19/03 , H01M10/054 , H01M4/02
CPC分类号： H01M4/134 , C22C19/03 , H01M10/054 , C22C2202/04 , H01M2004/027
摘要： A nickel-metal hydride secondary battery includes an outer can and a group of electrodes housed in the outer can together with an alkaline electrolytic solution. The group of electrodes includes a positive electrode and a negative electrode that are superposed with a separator interposed therebetween, and the negative electrode includes a hydrogen absorbing alloy for nickel-metal hydride secondary batteries, the hydrogen absorbing alloy having a single composition and composed of a plurality of crystal phases.
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公开(公告)号：US20220384786A1
公开(公告)日：2022-12-01
申请号：US17660387
申请日：2022-04-22
申请人： FDK CORPORATION
发明人： Akira Saguchi , Shota Ohata , Jun Ishida , Yuki Ehara , Masaru Kihara
摘要： A nickel metal hydride secondary battery comprises an outer can and an electrode assembly housed in the outer can together with an alkaline electrolytic solution, wherein the electrode assembly is such that a positive electrode including a positive electrode mixture and a negative electrode including a negative electrode mixture are superimposed with a separator interposed therebetween, the positive electrode mixture includes nickel hydroxide forming a solid solution with zinc as a positive electrode active material and zinc oxide as a positive electrode additive, the negative electrode mixture includes hydrogen absorbing alloy particles and a negative electrode additive, the negative electrode additive is a composite in which yttrium fluoride is supported on carbon black, and a surface of the hydrogen absorbing alloy particles is partially coated with the composite.
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公开(公告)号：US20200161646A1
公开(公告)日：2020-05-21
申请号：US16773367
申请日：2020-01-27
申请人： FDK CORPORATION , FUJITSU LIMITED
发明人： Takeshi Ito , Yuzo Imoto , Masaru Kihara , Takayuki Yano , Shigekazu Yasuoka , Shuuichi Doi , Takashi Yamazaki , Yuji Kataoka
摘要： A nickel-hydrogen secondary battery includes an electrode group comprising a separator, a positive electrode, and a negative electrode, and the positive electrode contains a positive electrode active material including a base particle comprising a nickel hydroxide particle containing Mn in solid solution and a conductive layer comprising a Co compound and covering the surface of the base particle, wherein the X-ray absorption edge energy of Mn detected within 6500 to 6600 eV by measurement with an XAFS method is 6548 eV or higher.
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公开(公告)号：US20220069285A1
公开(公告)日：2022-03-03
申请号：US17446285
申请日：2021-08-27
申请人： FDK CORPORATION
发明人： Shota Ohata , Jun Ishida , Yuki Ehara , Masaru Kihara
IPC分类号： H01M4/134 , H01M10/054 , C22C19/03
摘要： A nickel-metal hydride secondary battery includes an outer can and a group of electrodes housed in the outer can together with an alkaline electrolytic solution. The group of electrodes includes a positive electrode and a negative electrode that are superposed with a separator interposed therebetween, and the negative electrode includes a hydrogen absorbing alloy for nickel-metal hydride secondary batteries, the hydrogen absorbing alloy having a single composition and composed of a plurality of crystal phases.
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公开(公告)号：US12021223B2
公开(公告)日：2024-06-25
申请号：US17275297
申请日：2019-08-15
申请人： FDK CORPORATION
发明人： Tetsuya Yamane , Yuzo Imoto , Yuya Tanimoto , Masaru Kihara , Hideyuki Asanuma
CPC分类号： H01M4/32 , H01M4/62 , H01M10/30 , H01M2004/028
摘要： A battery 2 includes an outer can 10 and an electrode group 22 that is housed in the outer can 10 together with an alkaline electrolytic solution, in which a positive electrode 24 included in the electrode group 22 includes a positive electrode substrate and a positive electrode mixture supported on the positive electrode substrate, the positive electrode mixture includes nickel hydroxide and a positive electrode additive, the positive electrode additive includes a titanium oxide particle having an anatase-type crystal structure, the titanium oxide particle has an average primary particle size of 5 nm or more and 10 nm or less and a BET specific surface area of 230 m2/g or more and 360 m2/g or less, and includes 0.1% by mass or more of niobium, and a rate of addition of the titanium oxide relative to the nickel hydroxide is 0.1% by mass or more and 1.0% by mass or less.
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公开(公告)号：US20220384808A1
公开(公告)日：2022-12-01
申请号：US17663383
申请日：2022-05-13
申请人： FDK CORPORATION
发明人： Yuki Ehara , Jun Ishida , Shota Ohata , Akira Saguchi , Masaru Kihara
摘要： A negative electrode for an alkaline storage battery that achieves both an improvement in cycle life and an improvement in low temperature discharge characteristics, and an alkaline storage battery including the negative electrode are disclosed. The negative electrode for an alkaline storage battery includes a negative electrode core body formed of metal, and a negative electrode mixture layer which contains at least a hydrogen storage alloy and yttrium fluoride, and is carried on the negative electrode core body. Particles of the yttrium fluoride are formed so that the average particle size thereof is equal to 1 μm or more and 7 μm or less.
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公开(公告)号：US20220384779A1
公开(公告)日：2022-12-01
申请号：US17744647
申请日：2022-05-14
申请人： FDK CORPORATION
发明人： Shota Ohata , Akira Saguchi , Jun Ishida , Yuki Ehara , Masaru Kihara
摘要： A hydrogen absorbing alloy negative electrode is provided. The hydrogen absorbing alloy negative electrode has a hydrogen absorbing alloy, and an additive including yttrium fluoride. A mass of the yttrium fluoride is 0.1 parts by mass or more and 0.2 parts by mass or less based on a hydrogen absorbing alloy powder of 100 parts by mass.
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