公开(公告)号：US20240372140A1

公开(公告)日：2024-11-07

申请号：US18774445

申请日：2024-07-16

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Hitoshi ONODERA ,  Yuta SHIMONISHI

IPC: H01M10/0565 ,  H01M4/02 ,  H01M4/134 ,  H01M10/0525

Abstract: An electricity storage device includes a negative electrode, a positive electrode, a polymer electrolyte layer provided between the negative electrode and the positive electrode and having lithium ion conductivity, an electrolyte layer provided between the negative electrode and the positive electrode and having lithium ion conductivity, and an alloy-forming layer capable of forming an alloy with lithium. The polymer electrolyte layer contains cyclic polycarbonate and chain polycarbonate. The polymer electrolyte layer contains lithium salt. Concentration of lithium salt in the polymer electrolyte layer is 3 mol/L or more. The polymer electrolyte layer and the alloy-forming layer are formed at least on a surface of the electrolyte layer facing the negative electrode. The alloy-forming layer is located closer to the electrolyte layer than the polymer electrolyte layer. The polymer electrolyte layer is located closer to the negative electrode than the alloy-forming layer.

公开(公告)号：US20240380001A1

公开(公告)日：2024-11-14

申请号：US18782847

申请日：2024-07-24

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Hitoshi ONODERA ,  Yuta SHIMONISHI

IPC: H01M10/0562

Abstract: A solid electrolyte for a secondary battery includes an oxide-based solid electrolyte having a pyrochlore structure represented by a composition formula of Aa2−αAb(1+α)/3B2O7−βXβ, where Aa is an alkali metal, Ab contains at least a lanthanide, B is a cationic metal different from Aa and Ab, and X is an anion that is substitutable with an O atom constituting the pyrochlore structure.

公开(公告)号：US20240250293A1

公开(公告)日：2024-07-25

申请号：US18461545

申请日：2023-09-06

Applicant: DENSO CORPORATION

Inventor： Hitoshi ONODERA ,  Shuhei YOSHIDA ,  Yuta SHIMONISHI

IPC: H01M10/0562 ,  H01M4/62 ,  H01M10/0585 ,  H01M50/431 ,  H01M50/443 ,  H01M50/449

CPC classification number: H01M10/0562 ,  H01M4/62 ,  H01M10/0585 ,  H01M50/431 ,  H01M50/443 ,  H01M50/449 ,  H01M2004/028 ,  H01M2300/0071 ,  H01M2300/008 ,  H01M2300/0094

Abstract: A solid electrolyte for a secondary battery includes a core phase having a particle shape and a shell phase covering at least a part of the core phase. The shell phase consists of one or more phases. A constituent material of the core phase includes a pyrochlore solid electrolyte represented by a composition formula of Aa2−αAb(1+α)/3B2O7−βXβ, where Aa is an alkali metal, Ab is a lanthanoid, B is a cationic metal, and X is an anion that is substitutable with O. A constituent material of the shell phase includes a material having a chemical composition including Li and different from a chemical composition of the pyrochlore solid electrolyte, and having a melting point lower than a melting point of the pyrochlore solid electrolyte.