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公开(公告)号：US10297822B2
公开(公告)日：2019-05-21
申请号：US15362103
申请日：2016-11-28
Applicant: GS YUASA INTERNATIONAL LTD.
Inventor： Daisuke Endo , Yoshihiro Katayama , Tetsuya Murai , Masafumi Shibata
IPC: H01B1/08 , H01M4/04 , H01M4/131 , H01M4/1391 , H01M4/505 , H01M4/525 , H01M10/0525 , C01G45/12 , C01G51/00 , C01G53/00 , H01M10/052 , H01M4/02
Abstract: An object of the present invention is to provide a positive active material for a nonaqueous electrolyte secondary battery which has a large discharge capacity and is superior in charge-discharge cycle performance, initial efficiency and high rate discharge performance, and a nonaqueous electrolyte secondary battery using the positive active material. The present invention pertains to a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide which has a crystal structure of an α-NaFeO2 type, is represented by a compositional formula Li1+αMe1−αO2 (Me is a transition metal element including Co, Ni and Mn, α>0), and has a molar ratio Li/Me of Li to the transition metal element Me of 1.2 to 1.6, wherein a molar ratio Co/Me of Co in the transition metal element Me is 0.02 to 0.23, a molar ratio Mn/Me of Mn in the transition metal element Me is 0.62 to 0.72, and the lithium transition metal composite oxide is observed as a single phase attributed to a space group R3-m on an X-ray diffraction chart when it is electrochemically oxidized up to a potential of 5.0 V (vs. Li/Li+).
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2.发明申请POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, MANUFACTURING METHOD THEREOF, LITHIUM SECONDARY BATTERY ELECTRODE, AND LITHIUM SECONDARY BATTERY 审中-公开用于锂二次电池的正极活性材料，其制造方法，锂二次电池电极和锂二次电池公开(公告)号：US20140038053A1
公开(公告)日：2014-02-06
申请号：US13792372
申请日：2013-03-11
Applicant: GS YUASA INTERNATIONAL LTD.
Inventor： Daisuke Endo , Motonobu Murakami , Hiromasa Muramatsu
CPC classification number: H01M4/525 , C01G53/50 , C01P2006/11 , C01P2006/12 , C01P2006/14 , C01P2006/16 , H01M4/0471 , H01M4/505
Abstract: A positive active material for a lithium secondary battery contains a lithium-transition metal composite oxide represented by a composition formula of Li1+αMe1−αO2 (Me is a transition metal element including Co, Ni, and Mn; 1.2
Abstract translation: 锂二次电池用正极活性物质含有由Li1 +αMe1-αO2组成式表示的锂 - 过渡金属复合氧化物（Me是包括Co，Ni和Mn的过渡金属元素; 1.2（1 +α） /(1-alpha)<1.6）。 Me中所含的Co的摩尔比（Co / Me）为0.24〜0.36，当使用空间群R3-m作为基于X射线衍射图的晶体结构模型时，衍射的半值宽度 归属于（003）线的峰在0.204°至0.303°的范围内，或属于（104）线的衍射峰的半值宽度范围为0.278°至0.424°。
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3.发明申请公开(公告)号：US20130344387A1
公开(公告)日：2013-12-26
申请号：US13914907
申请日：2013-06-11
Applicant: GS YUASA INTERNATIONAL LTD.
Inventor： Daisuke Endo , Hiromasa Muramatsu
IPC: H01M4/48
CPC classification number: H01M4/131 , C01G53/006 , C01G53/50 , C01P2002/20 , C01P2002/76 , C01P2004/51 , C01P2004/61 , C01P2006/40 , H01M4/48 , H01M4/505 , H01M4/525 , H01M10/052 , H01M10/0525 , H01M2004/028 , H01M2220/20 , Y02E60/122 , Y02P70/54 , Y02T10/7011
Abstract: Provided is a positive active material for a lithium secondary battery includes a lithium transition metal composite oxide having an α-NaFeO2-type crystal structure and represented by the composition formula of Li1+αMe1-αO2 (Me is a transition metal including Co, Ni and Mn and α>0). The positive active material contains Na in an amount of 900 ppm or more and 16000 ppm or less, or K in an amount of 1200 ppm or more and 18000 ppm or less.
Abstract translation: 提供的锂二次电池用正极活性物质包括具有α-NaFeO 2型晶体结构并由组成式Li1 +αMe1-αO2表示的锂过渡金属复合氧化物（Me是包括Co，Ni的过渡金属和 Mn和α> 0）。 正极活性物质含有900ppm以上且16000ppm以下的Na，或1200ppm以上至18000ppm以下的K。
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公开(公告)号：US20230078256A1
公开(公告)日：2023-03-16
申请号：US17984687
申请日：2022-11-10
Applicant: GS Yuasa International Ltd.
Inventor： Daisuke Endo , Hiromasa Muramatsu
IPC: H01M4/525 , H01M4/04 , H01M4/505 , C01G53/00 , H01M10/0525
Abstract: Disclosed is a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide, in which the lithium transition metal composite oxide has an α-NaFeO2 structure, a molar ratio Li/Me of Li and a transition metal (Me) of 1.05≤Li/Me≤1.4, and a porosity of 5 to 15%.
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公开(公告)号：US11545662B2
公开(公告)日：2023-01-03
申请号：US16771281
申请日：2018-12-14
Applicant: GS Yuasa International Ltd.
Inventor： Daisuke Endo , Hiromasa Muramatsu
Abstract: Disclosed is a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide, in which the lithium transition metal composite oxide has an α-NaFeO2 structure, a molar ratio Li/Me of Li and a transition metal (Me) of 1.05≤Li/Me≤1.4, and a porosity of 5 to 15%.
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Patent Agency Ranking
公开(公告)号：US09859587B2
公开(公告)日：2018-01-02
申请号：US15348484
申请日：2016-11-10
Applicant: GS YUASA INTERNATIONAL LTD.
Inventor： Daisuke Endo
IPC: H01M4/505 , H01M4/525 , H01M4/583 , H01M10/0525 , H01M10/44 , H01M4/131 , H01M4/133 , H01M4/36 , H01M4/04 , H01M4/1391 , H01M4/1393 , H01M4/62 , H01M4/66
CPC classification number: H01M10/0525 , H01M4/0404 , H01M4/0435 , H01M4/131 , H01M4/133 , H01M4/1391 , H01M4/1393 , H01M4/364 , H01M4/505 , H01M4/525 , H01M4/583 , H01M4/623 , H01M4/625 , H01M4/661 , H01M10/44 , H01M10/446 , Y02E60/122
Abstract: Provided is a nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode and a nonaqueous electrolyte, wherein the positive electrode has a positive active material containing a lithium transition metal composite oxide having an α-NaFeO2-type crystal structure and represented by the composition formula: Li1+αMe1−αO2 (wherein Me is a transition metal element including Co, Ni and Mn; and α>0), and the negative electrode has a negative active material which contains a carbon material that is a mixture of graphite and amorphous carbon and in which the ratio of the amorphous carbon contained in the carbon material is 5 to 60% by mass.
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公开(公告)号：US09601752B2
公开(公告)日：2017-03-21
申请号：US15172762
申请日：2016-06-03
Applicant: GS Yuasa International Ltd.
Inventor： Daisuke Endo , Hiromasa Muramatsu
IPC: H01M4/00 , H01M4/131 , H01M4/505 , H01M4/525 , H01M4/48 , C01G53/00 , H01M10/0525 , H01M10/052 , H01M4/02
CPC classification number: H01M4/131 , C01G53/006 , C01G53/50 , C01P2002/20 , C01P2002/76 , C01P2004/51 , C01P2004/61 , C01P2006/40 , H01M4/48 , H01M4/505 , H01M4/525 , H01M10/052 , H01M10/0525 , H01M2004/028 , H01M2220/20 , Y02E60/122 , Y02P70/54 , Y02T10/7011
Abstract: Provided is a positive active material for a lithium secondary battery includes a lithium transition metal composite oxide having an α-NaFeO2-type crystal structure and represented by the composition formula of Li1+αMe1−αO2 (Me is a transition metal including Co, Ni and Mn and α>0). The positive active material contains Na in an amount of 900 ppm or more and 16000 ppm or less, or K in an amount of 1200 ppm or more and 18000 ppm or less.
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公开(公告)号：US10319998B2
公开(公告)日：2019-06-11
申请号：US15026429
申请日：2014-10-01
Applicant: GS Yuasa International Ltd.
Inventor： Daisuke Endo , Hiromasa Muramatsu
Abstract: A positive active material for a lithium secondary battery containing a lithium transition metal composite oxide having a hexagonal crystal structure in which the transition metal (Me) includes Ni, Co and Mn, wherein in the lithium transition metal composite oxide, a molar ratio of Ni to the transition metal (Me) (Ni/Me) is 0.5 or more and 0.9 or less, a molar ratio of Co to the transition metal (Me) (Co/Me) is 0.1 or more and 0.3 or less, a molar ratio of Mn to the transition metal (Me) (Mn/Me) is 0.03 or more and 0.3 or less, and a value obtained by dividing a half width ratio F(003)/F(104) at a potential of 4.3 V (vs. Li/Li+) by a half width ratio F(003)/F(104) at a potential of 2.0 V (vs. Li/Li+) is 0.9 or more and 1.1 or less.
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公开(公告)号：US09825281B2
公开(公告)日：2017-11-21
申请号：US13629001
申请日：2012-09-27
Applicant: GS YUASA INTERNATIONAL LTD.
Inventor： Daisuke Endo , Miki Yasutomi , Yoshihiro Katayama , Toshiyuki Nukuda
IPC: H01M4/04 , H01M4/505 , H01M4/525 , H01M10/052 , C01G45/12 , C01G51/00 , C01G53/00 , H02J7/00 , H01M10/44
CPC classification number: H01M4/0445 , C01G45/1228 , C01G51/42 , C01G51/50 , C01G53/50 , C01P2002/50 , C01P2002/72 , C01P2002/74 , C01P2002/77 , C01P2004/82 , C01P2006/40 , H01M4/505 , H01M4/525 , H01M10/052 , H01M10/446 , H02J7/00 , Y10T29/49108
Abstract: A lithium secondary battery is produced by employing a charging method where a positive electrode upon charging has a maximum achieved potential of 4.3 V (vs. Li/Li+) or lower. The lithium secondary battery contains an active material including a solid solution of a lithium transition metal composite oxide having an α-NaFeO2-type crystal structure. The solid solution has a diffraction peak observed near 20 to 30° in X-ray diffractometry using CuKα radiation for a monoclinic Li[Li1/3Mn2/3]O2-type before charge-discharge. The lithium secondary battery is charged to reach at least a region with substantially flat fluctuation of potential appearing in a positive electrode potential region exceeding 4.3 V (vs. Li/Li+) and 4.8 V (vs. Li/Li+) or lower. A dischargeable electric quantity in a potential region of 4.3 V (vs. Li/Li+) or lower is 177 mAh/g or higher.
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公开(公告)号：US09692043B2
公开(公告)日：2017-06-27
申请号：US14778871
申请日：2014-03-26
Applicant: GS Yuasa International Ltd. , Tokyo University of Science Educational Foundation Administrative Organization
Inventor： Mitsue Takeuchi , Naoaki Yabuuchi , Shinichi Komaba , Daisuke Endo
CPC classification number: H01M4/131 , C01G45/1228 , C01G49/009 , C01P2002/76 , C01P2004/61 , H01B1/08 , H01M4/485 , H01M4/505 , H01M4/525
Abstract: An active material for a nonaqueous electrolyte energy storage device contains a lithium-transition metal composite oxide having a crystal structure attributable to space group Fm-3m and represented by the compositional formula (1): Li1+xNbyMezApO2 (1) wherein Me is a transition metal including Fe and/or Mn, 0
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