公开(公告)号：US20210347787A1

公开(公告)日：2021-11-11

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

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.

公开(公告)号：US20230178793A1

公开(公告)日：2023-06-08

申请号：US17734788

申请日：2022-05-02

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jihyun HONG ,  Minah LEE ,  Jin Kwan CHOI ,  Jina LEE

IPC: H01M10/056 ,  H01M10/0525

CPC classification number: H01M10/056 ,  H01M10/0525 ,  H01M2300/0025 ,  H01M2300/002 ,  H01M2220/20 ,  H01M2220/30

Abstract: The present disclosure relates to an electrolyte operable in wide temperature ranges and a lithium battery including the same. By dissolving two or more lithium salts in a mixture solvent including three or more different acyclic alkyl carbonate compounds, reactivity with lithium metal and freezing point are decreased at the same time and, therefore, the lifetime characteristics and electrochemical performance of a lithium-ion battery, a lithium-metal battery, or a lithium-ion capacitor using the same are improved significantly.

公开(公告)号：US20210151756A1

公开(公告)日：2021-05-20

申请号：US16829689

申请日：2020-03-25

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Moeez IQRA ,  Ji-Young KIM ,  Jaeho PARK ,  Hee-Dae LIM ,  Hun-Gi JUNG ,  Won Young CHANG ,  Minah LEE ,  Seungho YU ,  Kyung Yoon CHUNG

IPC: H01M4/58 ,  C01D3/04

Abstract: The present disclosure relates to a cathode active material for a secondary battery, a cathode for a secondary battery including the same, a secondary battery including the cathode for a secondary battery and manufacturing methods thereof. More particularly, it is possible to obtain a secondary battery having excellent electrochemical characteristics by electrochemically inducing a structural phase change in the cathode active material of a secondary battery including NaCl as a cathode active material.

公开(公告)号：US20210075053A1

公开(公告)日：2021-03-11

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 ,  H01M10/0569 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/04

Abstract: The present disclosure relates to a cathode active material for a sodium ion secondary battery having high reversible capacity and excellent cycle characteristics, and a method for preparing the same. The cathode active material for a sodium ion secondary battery shows high reversible capacity and excellent cycle characteristics, when it is applied to a secondary battery. Therefore, when the cathode active material is used for manufacturing a cathode for a sodium ion secondary battery and the cathode is applied to a sodium ion secondary battery, the battery can substitute for the conventional expensive lithium ion secondary battery and can be applied to various industrial fields.

公开(公告)号：US20240339602A1

公开(公告)日：2024-10-10

申请号：US18207267

申请日：2023-06-08

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Si Hyoung OH ,  Jinyeon HWANG ,  Minah LEE ,  Woo Joo NO ,  Kyung Yoon CHUNG

IPC: H01M4/46 ,  C07F9/09 ,  H01M4/04 ,  H01M10/054 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/44

CPC classification number: H01M4/466 ,  C07F9/09 ,  H01M4/0416 ,  H01M10/054 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/44

Abstract: Exemplary embodiments of the present invention may provide a magnesium electrode including an electrode plate including magnesium and a protective layer located on at least a part of a surface of the electrode plate, in which the protective layer includes a phosphoric acid alkyl ester compound.

公开(公告)号：US20230170537A1

公开(公告)日：2023-06-01

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

CPC classification number: H01M10/4242 ,  C01G45/02 ,  C01G55/00 ,  C01P2006/40 ,  H01M2300/0002

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：US20210167386A1

公开(公告)日：2021-06-03

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 ,  H01G9/008 ,  H01G9/042 ,  H01G9/035 ,  H01G9/145

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：US20250062310A1

公开(公告)日：2025-02-20

申请号：US18680217

申请日：2024-05-31

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jihyun HONG ,  Minah LEE ,  Jinkwan CHOI ,  Hun-Gi JUNG ,  Dong-Ik KIM

IPC: H01M4/04 ,  H01M4/02 ,  H01M4/485 ,  H01M4/62

Abstract: Provided are a prelithiation method of a silicon-based active material, the prelithiation method including step S1 of immersing the silicon-based active material in a prelithiation solution including an organic solvent and a lithium-hydrocarbon molecule complex, step S2 of obtaining a powder by washing the silicon-based active material with the organic solvent and drying the silicon-based active material, and step S3 of performing a heat treatment on the powder at a temperature of 400° C. to 800° C. in an inert gas atmosphere, and a silicon-based active material prelithiated by the method.

公开(公告)号：US20230178709A1

公开(公告)日：2023-06-08

申请号：US17741660

申请日：2022-05-11

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Minah LEE ,  Jihyun HONG ,  Hun-Gi JUNG ,  Jin Kwan CHOI

IPC: H01M4/04 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/049 ,  H01M4/386 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/027

Abstract: The present disclosure relates to a delithiation solution and a method for forming an anode active material or an anode using the same. By chemically extracting reactive lithium from a high-capacity anode active material or anode, which has high initial coulombic efficiency due to high lithium content but exhibits decreased stability in dry air or in a solvent for preparation of a slurry, stability can be improve and initial coulombic efficiency can be maintained high. In addition, the method for forming an anode active material or an anode according to the present disclosure can greatly reduce the cost and time required for delivery after production of a lithium-ion battery.

公开(公告)号：US20220102721A1

公开(公告)日：2022-03-31

申请号：US17217413

申请日：2021-03-30

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Minah LEE ,  Jihyun HONG ,  Kyung Yoon CHUNG ,  Jin Kwan CHOI ,  Ju Young JANG

IPC: H01M4/583 ,  H01M10/0525 ,  H01M4/38 ,  H01M10/0569 ,  H01M10/0568 ,  H01M4/525 ,  H01M4/505 ,  H01M4/62 ,  H01M4/04

Abstract: The present disclosure provides a prelithiation solution for a graphite or graphite/silicon composite anode, which includes: (a) a cyclic or linear ether-based solvent; and (b) an aromatic hydrocarbon-lithium complex, and has a reduction potential of 0.25 V (vs Li/Li+) or lower.
According to the present disclosure, lithium ions can be chemically intercalated uniformly throughout a graphite or graphite composite anode in solution phase and a high level of prelithiation may be achieved. In addition, an anode having an initial coulombic efficiency close to 100% may be provided by prelithiating a graphite or graphite composite anode using the prelithiation solution and a commercially applicable lithium secondary battery exhibiting high energy density may be provided based thereon.