公开(公告)号：US11411219B2

公开(公告)日：2022-08-09

申请号：US16817757

申请日：2020-03-13

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY ,  KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Hee-Dae Lim ,  Si Hyoung Oh ,  Hun-Gi Jung ,  Minah Lee ,  Hyungseok Kim ,  Sang Ok Kim ,  Young Soo Yun

IPC: H01M4/587 ,  H01M10/054 ,  H01M10/0568 ,  H01G9/042 ,  H01G9/008 ,  H01G9/035 ,  H01G9/145 ,  H01M4/02

Abstract: Disclosed is a calcined carbon material for a magnesium battery anode. The calcined carbon material includes catalytic carbon nanotemplates having a network structure in which nanofibers are entangled three-dimensionally. The calcined carbon material can be used as a magnesium battery anode material. Also disclosed is a method for preparing the calcined carbon material.

公开(公告)号：US10818922B2

公开(公告)日：2020-10-27

申请号：US16268891

申请日：2019-02-06

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kyung Yoon Chung ,  Hun-Gi Jung ,  Ji-Young Kim ,  Ghulam Ali ,  Mobinul Islam ,  Sang Ok Kim ,  Hyungseok Kim

IPC: H01M4/525 ,  H01M10/054 ,  H01M4/131 ,  H01M4/1391 ,  C01G51/04 ,  H01M4/02

Abstract: An anode active material for a sodium ion secondary battery, a sodium ion secondary battery including an anode active material, and an electric device including the sodium ion secondary battery are disclosed. The anode active material for a sodium ion secondary battery includes a cobalt tin spinel oxide represented by Co2.4Sn0.6O4. The sodium ion secondary battery includes an anode made of an anode active material composed of a cobalt tin spinel oxide represented by Chemical Formula 1 below: Co2+xSn1-xO4,  Chemical Formula 1 where x is a real number satisfying 0≤x≤0.9; an electrolyte; and a cathode. The sodium ion secondary battery has high capacity characteristics. The electric device including the sodium ion secondary battery includes an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and an electric power storage system.

公开(公告)号：US12283666B2

公开(公告)日：2025-04-22

申请号：US17874966

申请日：2022-07-27

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Si Hyoung Oh ,  Hyungi Jo ,  Min Ji Jeong ,  Woo Joo No ,  Hyungseok Kim ,  Minah Lee

IPC: H01M10/42 ,  C01G45/02 ,  C01G55/00

Abstract: Disclosed is a noble metal-manganese oxide composite catalyst for a positive electrode of an aqueous rechargeable battery that can regenerate a solvent of an aqueous electrolyte. Also disclosed are a method for preparing the composite catalyst, a positive electrode for an aqueous rechargeable battery including the composite catalyst, and an aqueous rechargeable battery including the positive electrode. The composite catalyst can regenerate reaction products, including gases continuously generated from spontaneous corrosion of the electrodes or side reactions, back to water to prevent depletion of the electrolyte. Due to this ability, the composite catalyst improves the life characteristics of the battery and suppresses the occurrence of excessive overpotentials at the electrodes. Therefore, the use of the composite catalyst is effective in preventing the performance of the battery from deteriorating. In addition, the composite catalyst can prevent an increase in the internal pressure of the battery resulting from gas generation and reduce the risk of fire or explosion, contributing to a significant improvement in the safety of the battery.

公开(公告)号：US11777136B2

公开(公告)日：2023-10-03

申请号：US16725656

申请日：2019-12-23

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kyung Yoon Chung ,  Dong Hyun Kim ,  Juhyeon Ahn ,  Jaeho Park ,  Ji-Young Kim ,  Min Kyung Cho ,  Byung Won Cho ,  Hun-Gi Jung ,  Minah Lee ,  Seungho Yu ,  Hyungseok Kim

IPC: H01M10/054 ,  H01M4/04 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/525 ,  H01M10/0569

CPC classification number: H01M10/054 ,  H01M4/0445 ,  H01M4/0459 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0569

Abstract: Disclosed is a method of preparing a cathode active material useful in a sodium ion secondary battery having high reversible capacity and excellent cycle characteristics. The method for preparing a cathode active material composed of Zrw-doped NaxLiyMzOa includes the steps of (A) doping LiyMzOa with Zrw to provide Zrw-doped LiyMzOa; and (B) dissociating Li ion from the Zrw-doped LiyMzOa and inserting Na ion thereto to provide the Zrw-doped NaxLiyMzOa, wherein M is selected from Ti, V, Cr, Mn, Fe, Co, Ni, Mo, Ru, and combinations thereof, and wherein 0.005

公开(公告)号：US11905302B2

公开(公告)日：2024-02-20

申请号：US17121347

申请日：2020-12-14

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Minah Lee ,  Jihyun Hong ,  Kyung Yoon Chung ,  Jin-Yoo Suh ,  Sang Ok Kim ,  Hyungseok Kim ,  Inyeong Kang ,  Ju Young Jang ,  Jin Kwan Choi

IPC: H01M10/0525 ,  C07F1/02 ,  H01M4/36 ,  H01M4/04 ,  H01M4/02

CPC classification number: C07F1/02 ,  H01M4/049 ,  H01M4/366 ,  H01M10/0525 ,  H01M2004/028

Abstract: The present disclosure relates to a prelithiation solution and a method for preparing a prelithiated anode using the same. The prelithiation solution and the method for preparing a prelithiated anode using the same according to the present disclosure allow uniform intercalation of lithium ions throughout the anode chemically in a solution via a simple process of immersing the anode in a prelithiation solution having a sufficiently low redox potential as compared to an anode active material. A prelithiated anode prepared by this method has an ideal initial coulombic efficiency and a lithium secondary battery with a high energy density can be prepared based thereon. In addition, the prepared anode is advantageously applicable to large-scale production due to superior stability even in dry air.