公开(公告)号：US20230216048A1

公开(公告)日：2023-07-06

申请号：US17927682

申请日：2021-05-20

Applicant: FDK CORPORATION ,  Kansai Catalyst Co., Ltd.

Inventor： Juji KATO ,  Tomohiro FUJISAWA ,  Yuji GOTO ,  Kouichi HASHIMOTO

IPC: H01M4/58 ,  H01M10/058 ,  C01B25/45

CPC classification number: H01M4/5825 ,  H01M10/058 ,  C01B25/45 ,  H01M2004/028

Abstract: This method achieves lithium cobalt pyrophosphate in which the generation of different phases is suppressed. A powder of a lithium compound, a cobalt compound and a phosphorus compound in amounts based on the composition of lithium cobalt pyrophosphate is mixed while adding water at a prescribed temperature (T1), for example, room temperature, and the substance obtained thereby is further mixed at a higher temperature (T2), for example, 40° C.-60° C. In this way, a precursor of lithium cobalt pyrophosphate is formed that has excellent uniformity of distribution of the lithium component, the cobalt component and the phosphorus component. By firing such a precursor, a lithium cobalt pyrophosphate is obtained in which the generation of different phases is suppressed.

公开(公告)号：US20220344633A1

公开(公告)日：2022-10-27

申请号：US17854106

申请日：2022-06-30

Applicant: FDK CORPORATION

Inventor： Masakazu KOBAYASHI ,  Akihiro MITANI ,  Satoshi HIGUCHI ,  Minako SUZUKI ,  Yuji GOTO

IPC: H01M4/139 ,  H01M10/0562 ,  H01M10/0585 ,  H01M4/04

Abstract: A method of manufacturing a solid-state battery includes forming an electrode that includes a first electrode layer and a second electrode layer facing the first electrode layer and that further includes a buried layer interposed between the first electrode layer and the second electrode layer so as to surround a contact portion where these electrode layers contact each other. For the buried layer, a solid electrolyte with lower electron conductivity than an electrode active material is used, for example. The buried layer is provided between the edge portion of the first electrode layer and the edge portion of the second electrode layer, so that deformation of the first electrode layer and second electrode layer is prevented in the subsequent lamination and thermocompression bonding and thus the occurrence of a short circuit due to such deformation is prevented in the solid-state battery.

公开(公告)号：US20230307715A1

公开(公告)日：2023-09-28

申请号：US18198325

申请日：2023-05-17

Applicant: FDK CORPORATION

Inventor： Masakazu KOBAYASHI ,  Tomohiro FUJISAWA ,  Minako SUZUKI ,  Yuji GOTO

IPC: H01M10/0585 ,  H01M10/48 ,  H01M4/04

CPC classification number: H01M10/0585 ,  H01M4/0471 ,  H01M10/48

Abstract: A solid-state battery includes a battery body in which a positive electrode layer, an electrolyte layer, and a negative electrode layer are stacked; and a reference electrode stacked on a surface in the direction which these layers are stacked. The solid-state battery further includes a positive electrode connected to the positive electrode layer and a negative electrode connected to the negative electrode layer. The positive and negative electrodes are provided on the battery body.