公开(公告)号：US12224395B2

公开(公告)日：2025-02-11

申请号：US17076159

申请日：2020-10-21

Applicant: NGK INSULATORS, LTD.

Inventor： Yukinobu Yura ,  Shigeki Okada

IPC: H01M10/0525 ,  H01M4/02 ,  H01M4/485 ,  H01M4/525 ,  H01M50/431 ,  H01M50/443 ,  H01M50/489

Abstract: Provided is a lithium secondary battery including 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.

公开(公告)号：US12224423B2

公开(公告)日：2025-02-11

申请号：US17495004

申请日：2021-10-06

Applicant: NGK INSULATORS, LTD.

Inventor： Yukinobu Yura ,  Shigeki Okada

IPC: H01M4/00 ,  C04B35/01 ,  H01M4/04 ,  H01M4/131 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/04 ,  H01M10/0525 ,  H01M4/02

Abstract: Provided is a lithium complex oxide sintered plate for use in a positive electrode of a lithium secondary battery. The lithium complex oxide sintered plate has a structure in which a plurality of primary grains having a layered rock-salt structure are bonded, and has a porosity of 3 to 40%, a mean pore diameter of 15 μm or less, an open porosity of 70% or more, and a thickness of 15 to 200 μm. The plurality of primary grains has a primary grain diameter, i.e., a mean diameter of the primary grains, of 20 μm or less and a mean tilt angle of more than 0° to 30° or less. The mean tilt angle is a mean value of the angles defined by the (003) planes of the primary grains and the plate face of the lithium complex oxide sintered plate.

公开(公告)号：US11329285B2

公开(公告)日：2022-05-10

申请号：US16537757

申请日：2019-08-12

Applicant: NGK INSULATORS, LTD.

Inventor： Yukinobu Yura ,  Shigeki Okada

IPC: H01M4/00 ,  H01M4/525 ,  C01G51/00 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/02

Abstract: Disclosed is a lithium complex oxide sintered plate including a plurality of primary grains having a layered rock-salt structure, the primary grains being bonded. The lithium complex oxide has a composition represented by the formula: Lix(Co1-yMy)O2±δ (wherein, 1.0≤x≤1.1, 0

公开(公告)号：US20180233744A1

公开(公告)日：2018-08-16

申请号：US15952540

申请日：2018-04-13

Applicant: NGK INSULATORS, LTD.

Inventor： Naoto OHIRA ,  Yukinobu Yura ,  Shigeki Okada

IPC: H01M4/525 ,  C01G51/00 ,  H01M10/0525 ,  H01M10/0585

CPC classification number: H01M4/525 ,  C01G51/42 ,  C01P2006/40 ,  H01M4/0409 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/1391 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0562 ,  H01M10/0585 ,  H01M2004/021 ,  H01M2004/028

Abstract: The plate-shaped lithium composite oxide is configured by a plurality of mutually bonded primary particles respectively composed of a lithium composite oxide having a layered rock-salt structure. When fully charged, an expansion-contraction ratio E in a plate face direction parallel to a plate face is less than or equal to 0.5%.

公开(公告)号：US12183874B2

公开(公告)日：2024-12-31

申请号：US17095910

申请日：2020-11-12

Applicant: NGK INSULATORS, LTD.

Inventor： Yukinobu Yura ,  Shigeki Okada ,  Kengo Oishi

IPC: H01M10/0525 ,  H01M4/02 ,  H01M4/485 ,  H01M4/525 ,  H01M10/0585 ,  H01M50/10 ,  H01M50/409 ,  H01M50/431 ,  H01M50/489 ,  H01M50/491

Abstract: Provided is a lithium secondary battery including 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.

公开(公告)号：US12046711B2

公开(公告)日：2024-07-23

申请号：US17095898

申请日：2020-11-12

Applicant: NGK INSULATORS, LTD.

Inventor： Yukinobu Yura ,  Shigeki Okada

IPC: H01M4/525 ,  H01M4/48 ,  H01M4/485 ,  H01M4/52 ,  H01M10/0525 ,  H01M10/056 ,  H01M10/0564 ,  H01M10/0566 ,  H01M10/0585 ,  H01M50/10 ,  H01M50/409 ,  H01M50/431 ,  H01M50/434 ,  H01M50/437 ,  H01M50/489 ,  H01M4/02 ,  H01M50/463 ,  H01M50/491

CPC classification number: H01M10/0525 ,  H01M4/485 ,  H01M4/525 ,  H01M10/0585 ,  H01M50/10 ,  H01M50/409 ,  H01M50/431 ,  H01M50/489 ,  H01M2004/021 ,  H01M50/463 ,  H01M50/491

Abstract: Provided is a lithium secondary battery including 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 therebetween, an electrolytic solution, and an exterior body including a closed space, which accommodates 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, a ratio C/A of a capacity C of the positive electrode layer to a capacity A of the negative electrode layer is 1.03 to 2.30, a ratio Tc/Ta of a thickness Tc of the positive electrode layer to a thickness Ta of the negative electrode layer is 0.50 to 2.00, the thickness Tc is 50 to 1000 μm, and the thickness Ta is 50 to 1200 μm.

公开(公告)号：US09023519B2

公开(公告)日：2015-05-05

申请号：US13772500

申请日：2013-02-21

Applicant: NGK Insulators, Ltd.

Inventor： Shuichi Ozawa ,  Akira Urakawa ,  Shigeki Okada ,  Ryuta Sugiura ,  Tsutomu Nanataki

IPC: H01M4/13 ,  H01M4/04 ,  H01M4/139 ,  H01M4/70 ,  H01M4/1391

CPC classification number: H01M4/13 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/70 ,  Y02E60/122 ,  Y02P70/54 ,  Y10T29/49115

Abstract: The present invention relates to a cathode and a cathode active material plate for a lithium secondary battery, and the production method thereof. There is a feature of the present invention in that grooves consisting of a concave portion and having an infinite form (for example, an infinite cell-like shape) in a planar view are formed in a principal surface of the cathode active material plate.

Abstract translation: 本发明涉及锂二次电池用阴极和阴极活性物质板及其制造方法。 本发明的特征在于，在阴极活性物质板的主面上形成有在平面图中由凹部构成的具有无限形状（例如无限细胞状的形状）的槽。

公开(公告)号：US12034145B2

公开(公告)日：2024-07-09

申请号：US17072402

申请日：2020-10-16

Applicant: NGK INSULATORS, LTD.

Inventor： Yukinobu Yura ,  Shigeki Okada

IPC: H01M4/131 ,  H01M4/485 ,  H01M4/525 ,  H01M10/0585 ,  H01M50/434 ,  H01M50/443

CPC classification number: H01M4/131 ,  H01M4/485 ,  H01M4/525 ,  H01M10/0585 ,  H01M50/434 ,  H01M50/443

Abstract: Provided is a lithium secondary battery including 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.

公开(公告)号：US11211600B2

公开(公告)日：2021-12-28

申请号：US16677909

申请日：2019-11-08

Applicant: NGK INSULATORS, LTD.

Inventor： Yukinobu Yura ,  Shigeki Okada ,  Nobuyuki Kobayashi

IPC: H01M4/131 ,  H01M4/485 ,  H01M10/0525 ,  H01M10/0566 ,  H01M4/02

Abstract: Provided is a lithium titanate sintered plate for use in a negative electrode of a lithium secondary battery. The lithium titanate sintered plate has a structure in which a plurality of primary grains are bonded, and has: a thickness of 10 to 290 μm; a primary grain diameter of 0.70 μm or less, the primary grain diameter being a mean grain diameter of the primary grains; a porosity of 21 to 45%; an open pore rate of 60% or more; a mean pore aspect ratio of 1.15 or more; a ratio of 30% or more of pores having an aspect ratio of 1.30 or more to all the pores; and a mean pore diameter of 0.70 μm or less, wherein volume-based D10 and D90 pore diameters satisfy the relationship: 4.0≤D90/D10≤50.

公开(公告)号：US11211599B2

公开(公告)日：2021-12-28

申请号：US16531420

申请日：2019-08-05

Applicant: NGK INSULATORS, LTD.

Inventor： Yukinobu Yura ,  Shigeki Okada

IPC: H01M4/00 ,  H01M4/131 ,  C04B35/01 ,  H01M4/04 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/04 ,  H01M10/0525 ,  H01M4/02

Abstract: Provided is a lithium complex oxide sintered plate for use in a positive electrode of a lithium secondary battery. The lithium complex oxide sintered plate has a structure in which a plurality of primary grains having a layered rock-salt structure are bonded, and has a porosity of 3 to 40%, a mean pore diameter of 15 μm or less, an open porosity of 70% or more, and a thickness of 15 to 200 μm. The plurality of primary grains has a primary grain diameter, i.e., a mean diameter of the primary grains, of 20 μm or less and a mean tilt angle of more than 0° to 30° or less. The mean tilt angle is a mean value of the angles defined by the (003) planes of the primary grains and the plate face of the lithium complex oxide sintered plate.