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公开(公告)号：EP3352255A1
公开(公告)日：2018-07-25
申请号：EP17789514.1
申请日：2017-04-25
Applicant: NGK Insulators, Ltd.
Inventor： YURA Yukinobu, , OHIRA, Naoto , OKADA, Shigeki
CPC classification number: H01M4/525 , C01G51/00 , C01G51/42 , C01P2004/61 , C01P2006/42 , H01M4/131 , H01M10/052 , H01M10/0525 , H01M10/0566 , H01M2004/021 , H01M2004/028
Abstract: A positive electrode (106) comprises a plurality of mutually bonded primary particles (20) respectively composed of a lithium composite oxide having a layered rock-salt structure. An average orientation angle of the plurality of primary particles (20) relative to a plate face direction that is parallel to a plate face is more than 0° and less than or equal to 30°. In a cross section of the positive electrode (106), the aggregate area of primary particles that have an orientation angle relative to the plate face direction of more than 0° and less than or equal to 30° is greater than or equal to 70% relative to the total area of the plurality of primary particles (20).
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公开(公告)号：EP3796457A1
公开(公告)日：2021-03-24
申请号：EP19803434.0
申请日：2019-05-14
Applicant: NGK Insulators, Ltd.
Inventor： YURA, Yukinobu , OKADA, Shigeki
IPC: H01M10/0585 , H01M2/16 , H01M4/131 , H01M4/485 , H01M10/0525
Abstract: Provided is a lithium secondary battery that is of the integrated sintered plate type in which a positive electrode layer, a ceramic separator, and a negative electrode layer are bonded together and that can achieve both high yield and excellent battery performance. The lithium secondary battery includes a positive electrode layer composed of a lithium complex oxide sintered body, a negative electrode layer composed of a titanium-containing sintered body, a ceramic separator, an electrolytic solution, and an exterior body including a closed space, the closed space accommodating the positive electrode layer, the negative electrode layer, the ceramic separator, and the electrolytic solution, wherein the positive electrode layer, the ceramic separator, and the negative electrode layer are bonded together, the ceramic separator is composed of MgO and glass, the glass has an average grain size of 0.5 to 25 µm, and a ratio of the average grain size of the glass to the average grain size of MgO is 1.5 to 85.
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公开(公告)号：EP3796456A1
公开(公告)日：2021-03-24
申请号：EP19803229.4
申请日：2019-05-14
Applicant: NGK Insulators, Ltd.
Inventor： YURA, Yukinobu , OKADA, Shigeki , OISHI, Kengo
IPC: H01M10/0585 , H01M2/16 , H01M4/131 , H01M4/485 , H01M10/0525
Abstract: Provided is a lithium secondary battery that is of the integrated sintered plate type in which a positive electrode layer, a ceramic separator, and a negative electrode layer are bonded together and that can achieve both high yield and excellent battery performance. The lithium secondary battery includes a positive electrode layer composed of a lithium complex oxide sintered body, a negative electrode layer composed of a titanium-containing sintered body, a ceramic separator, an electrolytic solution, and an exterior body including a closed space, the closed space accommodating the positive electrode layer, the negative electrode layer, the ceramic separator, and the electrolytic solution, wherein the positive electrode layer, the ceramic separator, and the negative electrode layer are bonded together, the ceramic separator is composed of MgO and glass, and when a cross section at the interface between the negative electrode layer and the ceramic separator is observed, a ratio of a region occupied by glass grains having a length of 1 µm or more in a direction parallel to the interface with respect to a region occupied by glass grains constituting the interface is 3 to 80%.
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公开(公告)号：EP3796455A1
公开(公告)日：2021-03-24
申请号：EP19802966.2
申请日：2019-05-14
Applicant: NGK Insulators, Ltd.
Inventor： YURA, Yukinobu , OKADA, Shigeki , OISHI, Kengo
IPC: H01M10/0585 , H01M2/16 , H01M4/131 , H01M4/485 , H01M10/0525
Abstract: Provided is a lithium secondary battery that is of the integrated sintered plate type in which a positive electrode layer, a ceramic separator, and a negative electrode layer are bonded together and that can be produced with high yield. The lithium secondary battery includes a positive electrode layer composed of a cobalt-containing lithium complex oxide sintered body, a negative electrode layer composed of a titanium-containing sintered body, a ceramic separator interposed between the positive electrode layer and the negative electrode layer and containing MgO, an electrolytic solution with which the positive electrode layer, the negative electrode layer, and the ceramic separator are impregnated, and an exterior body including a closed space, the closed space accommodating the positive electrode layer, the negative electrode layer, the ceramic separator, and the electrolytic solution, wherein the positive electrode layer, the ceramic separator, and the negative electrode layer are bonded together, and the interface between the negative electrode layer and the ceramic separator has a larger roughness than the interface between the positive electrode layer and the ceramic separator.
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公开(公告)号：EP4064403A1
公开(公告)日：2022-09-28
申请号：EP20890460.7
申请日：2020-09-01
Applicant: NGK Insulators, Ltd.
Inventor： YURA, Yukinobu , OKADA, Shigeki , MIZUKAMI, Shunsuke
IPC: H01M10/052 , H01M4/131 , H01M4/485 , H01M4/525 , H01M10/48 , H01M50/409
Abstract: Provided is a lithium secondary battery capable of providing a lithium secondary battery in which the resistance value changes greatly depending on the state of charge (SOC) while using a lithium complex oxide positive electrode such as LiCoO 2 (LCO) and a titanium-containing oxide negative electrode such as Li 4 Ti 5 O 12 (LTO). The lithium secondary battery includes a positive electrode layer composed of a lithium complex oxide sintered body and having a thickness of 70 µm or more; a negative electrode layer composed of a titanium-containing sintered body and having a thickness of 70 µm or more; a separator interposed between the positive electrode layer and the negative electrode layer; an electrolyte with which at least the separator is impregnated; and an outer package comprising a closed space, the closed space accommodating the positive electrode layer, the negative electrode layer, the separator, and the electrolyte, wherein the lithium secondary battery has a property that the resistance value decreases as the state of charge (SOC) increases from 10% to 80%.
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公开(公告)号：EP3796454A1
公开(公告)日：2021-03-24
申请号：EP19802519.9
申请日：2019-05-14
Applicant: NGK Insulators, Ltd.
Inventor： YURA, Yukinobu , OKADA, Shigeki
IPC: H01M10/0585 , H01M2/16 , H01M4/131 , H01M4/485 , H01M10/0525
Abstract: Provided is a lithium secondary battery with high discharge capacity, as expected, and excellent charge/discharge cycle performance. The lithium secondary battery includes a positive electrode layer composed of a lithium complex oxide sintered body, a negative electrode layer composed of a titanium-containing sintered body, a ceramic separator interposed between the positive electrode layer and the negative electrode layer, an electrolyte with which at least the ceramic separator is impregnated, and an exterior body comprising a closed space, the closed space accommodating the positive electrode layer, the negative electrode layer, the ceramic separator, and the electrolyte. The positive electrode layer, the ceramic separator, and the negative electrode layer form one integrated sintered plate as a whole, whereby the positive electrode layer, the ceramic separator, and the negative electrode layer are bonded together.
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公开(公告)号：EP3352255B1
公开(公告)日：2020-04-15
申请号：EP17789514.1
申请日：2017-04-25
Applicant: NGK Insulators, Ltd.
Inventor： YURA Yukinobu, , OHIRA, Naoto , OKADA, Shigeki
IPC: H01M4/131 , C01G51/00 , H01M4/525 , H01M4/1391 , H01M10/0525 , H01M10/052 , H01M4/02 , H01M10/0562 , H01M4/04
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8.发明公开
公开(公告)号：EP2642563A1
公开(公告)日：2013-09-25
申请号：EP11842232.8
申请日：2011-11-01
Applicant: NGK Insulators, Ltd.
Inventor： OKADA, Shigeki , NANATAKI, Tsutomu , KOBAYASHI, Nobuyuki , YOSHIKAWA, Jun , URAKAWA, Akira
CPC classification number: H01M10/052 , H01M4/131 , H01M4/505 , H01M4/525 , H01M4/621 , H01M4/623 , H01M10/0585 , Y02E60/122
Abstract: An object of the present invention is to provide a lithium secondary battery cathode which can more improve characteristics of the battery. The cathode of the present invention includes an electroconductive cathode current collector, a plurality of plate-like particle formed of a cathode active material, and a binder containing microparticles formed of the cathode active material and being smaller than the plate-like particles. The plate-like particles are formed so as to have an aspect ratio of 4 to 50. The plate-like particles are arranged such that the particles cover the surface of the cathode current collector surface at a percent area of 85 to 98%. The binder is disposed so as to intervene between two adjacent plate-like particles.
Abstract translation: 本发明的目的是提供一种可以更好地改善电池特性的锂二次电池阴极。 本发明的阴极包括导电性阴极集电体，由正极活性物质形成的多个板状粒子和由正极活性物质形成的小于板状粒子的含有微粒的粘合剂。 板状颗粒形成为具有4至50的纵横比。板状颗粒被布置成使得颗粒以85至98％的百分比面积覆盖阴极集电器表面的表面。 粘合剂被布置成介于两个相邻的板状颗粒之间。
