公开(公告)号：US20210265652A1

公开(公告)日：2021-08-26

申请号：US17302872

申请日：2021-05-14

Applicant: NGK INSULATORS, LTD.

Inventor： Daisuke IIDA ,  Eiji NAKASHIMA ,  Yuuki FUJITA

IPC: H01M10/0525 ,  H01M10/0567 ,  H01M10/0585 ,  H01M4/131

Abstract: A lithium secondary cell includes a positive electrode, a separator, a negative electrode, an electrolytic solution, and a cell case. The positive electrode, the negative electrode, and the separator are impregnated with the electrolytic solution. The cell case is a sheet-like member and convers the positive electrode and the negative electrode from both sides in the direction of superposition. The cell case houses therein the positive electrode, the separator, the negative electrode, and the electrolytic solution. The electrolytic solution contains an electrolytic solution material serving as a base compound and LiDFOB serving as an additive. The moisture content in the electrolytic solution is higher than or equal to 10 ppm by mass and lower than or equal to 15 ppm by mass.

公开(公告)号：US20240339588A1

公开(公告)日：2024-10-10

申请号：US18745019

申请日：2024-06-17

Applicant: NGK INSULATORS, LTD.

Inventor： Daisuke IIDA ,  Eiji NAKASHIMA ,  Nobuyuki KOBAYASHI

IPC: H01M4/131 ,  H01M4/02 ,  H01M4/133 ,  H01M10/0525 ,  H01M50/434

CPC classification number: H01M4/131 ,  H01M4/133 ,  H01M10/0525 ,  H01M50/434 ,  H01M2004/027 ,  H01M2004/028

Abstract: Provided is a honeycomb-type ceramic positive electrode having a columnar honeycomb structure, having a first end face, a second end face parallel to the first end face, and an outer side face perpendicular to the first end face and the second end face, and also having a plurality of holes extending from the first end face to the second end face. The honeycomb-type ceramic positive electrode is composed of a lithium complex oxide sintered body in which a plurality of primary grains composed of a lithium complex oxide are bonded, and when a central axis of the columnar honeycomb structure parallel to the outer side face or an axis parallel thereto is defined as a z-axis, the plurality of primary grains are oriented in a z-axis direction.

公开(公告)号：US20240332522A1

公开(公告)日：2024-10-03

申请号：US18738334

申请日：2024-06-10

Applicant: NGK INSULATORS, LTD.

Inventor： Takuaki MITSUHASHI ,  Daisuke IIDA ,  Eiji NAKASHIMA

IPC: H01M4/485 ,  H01M4/02 ,  H01M50/105 ,  H01M50/109 ,  H01M50/119 ,  H01M50/121 ,  H01M50/124 ,  H01M50/133 ,  H01M50/434 ,  H01M50/46

CPC classification number: H01M4/485 ,  H01M50/105 ,  H01M50/109 ,  H01M50/119 ,  H01M50/121 ,  H01M50/124 ,  H01M50/133 ,  H01M50/434 ,  H01M50/46 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided is a lithium secondary battery, including: a positive electrode layer including a lithium composite oxide sintered body; a negative electrode layer; a separator interposed between the positive electrode layer and the negative electrode layer; an electrolytic solution impregnated into the positive electrode layer, the negative electrode layer, and the separator; and an exterior body, which has a closed space and is configured to store the positive electrode layer, the negative electrode layer, the separator, and the electrolytic solution in the closed space. This lithium secondary battery has a determination coefficient R2 of 0.8 or more, which is obtained when plots of a square root of the number of days elapsed of up to 180 days and a capacity maintenance ratio (%) in a float charging test are linearly regressed.

公开(公告)号：US20240297358A1

公开(公告)日：2024-09-05

申请号：US18663219

申请日：2024-05-14

Applicant: NGK INSULATORS, LTD.

Inventor： Nobuyuki KOBAYASHI ,  Eiji NAKASHIMA ,  Daisuke IIDA ,  Yuki TANAKA

IPC: H01M10/54 ,  G06T7/00

CPC classification number: H01M10/54 ,  G06T7/0002 ,  G06T2207/10061

Abstract: A reuse support system performs an electrode degradation judgment to judge, based on one or a plurality of kinds of first data diagnosed regarding a ceramic electrode removed from a lithium-ion secondary battery having the ceramic electrode, whether or not a degradation degree of the removed ceramic electrode satisfies a condition for enabling regeneration of the ceramic electrode.