公开(公告)号：US20250054994A1

公开(公告)日：2025-02-13

申请号：US18797448

申请日：2024-08-07

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Seung Ho CHOI ,  Ji Sang YU ,  Woo Suk CHO ,  Kyung Su KIM

IPC: H01M4/66 ,  H01M4/02 ,  H01M10/052 ,  H01M10/0585 ,  H01M10/42 ,  H01M10/44

Abstract: Disclosed are a negative-electrode-free all-solid-state battery and a method for manufacturing the same, in which the negative-electrode-free all-solid-state battery has a coating layer including a lithium alloy derived from a sulfide-based inorganic compound in which a lithium site is doped with a doping element, and thus has excellent electrochemical characteristics and life characteristics.

公开(公告)号：US20230187692A1

公开(公告)日：2023-06-15

申请号：US18163699

申请日：2023-02-02

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woo Suk CHO ,  Kyung Su KIM ,  Ji Sang YU ,  Goo Jin JEONG ,  Keon Ho PARK

IPC: H01M10/0562

CPC classification number: H01M10/0562 ,  H01M2300/008

Abstract: A solid electrolyte having satisfactory moisture stability and ion conductivity through activation energy improvement and a solid-state battery including the same are proposed. The solid electrolyte may include an oxysulfide-based compound represented by the following chemical formula: [Chemical formula] LiaMbPcSdOeXf, wherein 5≤a≤7, 0

公开(公告)号：US20250105275A1

公开(公告)日：2025-03-27

申请号：US18823190

申请日：2024-09-03

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woo Suk CHO ,  Hyun Seung KIM ,  Jun Ho SONG ,  Ji Sang YU ,  Kyung Su KIM

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/02 ,  H01M4/131 ,  H01M4/62 ,  H01M10/0585

Abstract: Proposed is a positive electrode containing a positive electrode active material having a multimodal particle-size distribution to suppress particle crack of the positive electrode active material caused by pressure applied during a positive electrode and cell manufacturing process, thereby exhibiting excellent electrical characteristics. In addition, an all-solid-state battery including the positive electrode is proposed. The positive electrode may include a positive electrode active material formed of a lithium transition metal oxide and having a multimodal particle-size distribution in which particles with relatively small particle diameters have greater particle strength than particles with relatively large particle diameters.

公开(公告)号：US20150349339A1

公开(公告)日：2015-12-03

申请号：US14655616

申请日：2013-02-15

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woo Suk CHO ,  Jun-Ho SONG ,  Jeom-Soo KIM ,  Tae-Eun YIM ,  Young-Jun KIM ,  Sang-Min KIM ,  Hyunsang CHO

IPC: H01M4/525 ,  H01M4/52 ,  H01M4/58 ,  H01M4/36 ,  H01M4/04

CPC classification number: H01M4/525 ,  H01M4/0402 ,  H01M4/0471 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/523 ,  H01M4/5825 ,  H01M4/62 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: The present invention relates to a cathode active material for a lithium secondary battery and a preparation method thereof, and particularly, to a cathode active material for a lithium secondary battery having improved battery characteristics because of manganese phosphate uniformly coated on the surface of a Ni-rich cathode active material, and a preparation method thereof.According to the present invention, because manganese phosphate is uniformly coated on the surface of the Ni-rich cathode active material, a side reaction of the electrolyte is inhibited and a lithium secondary battery having excellent power characteristics, high temperature cycle life characteristics, and thermal stability can be prepared.

Abstract translation: 本发明涉及一种用于锂二次电池的正极活性材料及其制备方法，特别涉及一种具有改善的电池特性的锂二次电池用正极活性物质，因为在Ni- 丰富的正极活性物质及其制备方法。 根据本发明，由于磷酸锰均匀地涂覆在富Ni阴极活性物质的表面上，电解液的副反应被抑制，具有优异的功率特性，高温循环寿命特性和热性的锂二次电池 稳定性可以准备。

公开(公告)号：US20250055026A1

公开(公告)日：2025-02-13

申请号：US18796796

申请日：2024-08-07

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Seung Ho CHOI ,  Ji Sang YU ,  Woo Suk CHO ,  Kyung Su KIM

IPC: H01M10/0562 ,  H01M4/02 ,  H01M4/04 ,  H01M4/134 ,  H01M4/40

Abstract: Disclosed are a sulfide-based solid electrolyte doped with silver to have a novel composition, and an all-solid-state battery including the same.
According to one aspect of the present disclosure for achieving the above-described technical purpose, there is provided a sulfide-based solid electrolyte comprising a compound represented by a following Chemical formula 1: Lia-bMbPcSdXe  [Chemical formula 1] wherein M includes at least one selected from the group consisting of Ag, Na, K, Rb, Cs, Fr, and a combination thereof, wherein X includes at least one selected from the group consisting of F, Cl, Br, I, and combinations thereof, wherein 0

公开(公告)号：US20230387407A1

公开(公告)日：2023-11-30

申请号：US18364737

申请日：2023-08-03

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woo Suk CHO ,  Kyung Su KIM ,  Ji Sang YU ,  Jun Ho SONG ,  Keon Ho PARK

IPC: H01M4/525 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/62 ,  C01G53/00

CPC classification number: H01M4/525 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/62 ,  C01G53/50 ,  H01M2004/028

Abstract: A positive electrode active material, an all-solid-state battery comprising same, and a method for manufacturing same are proposed. The positive electrode active material may include a lithium metal oxide in the form of single particles having a particle strength of 300 MPa to 1500 MPa and an average particle diameter of at most 10 μm. Since the positive electrode active material is in the form of single particles having a high particle strength of at least 300 MPa and a small average particle diameter of at most 10 μm as indicated above, cracks may not form or may be delayed even when pressure is applied during the manufacture of the positive electrode or structural stress is applied over the lifespan of the battery.