公开(公告)号：US20230127602A1

公开(公告)日：2023-04-27

申请号：US17912452

申请日：2021-03-19

申请人： LG ENERGY SOLUTION, LTD. ,  THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

发明人： Jeong-Beom LEE ,  Hye-Ri JUNG ,  Hyea-Eun HAN ,  Hoe-Jin HAH ,  Sung-Rok BANG ,  Ying Shirley MENG ,  Huan Shen Darren TAN

IPC分类号： H01M4/38 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/505 ,  H01M4/36 ,  H01M4/525

摘要： The present disclosure relates to a solid state battery comprising silicon (Si) as a negative electrode active material. The solid state battery according to the present disclosure does not comprise a conductive material and a solid electrolyte in the negative electrode and comprise a minimum amount of binder. According to this structural feature, the battery according to the present disclosure has good electrical and chemical properties including heat resistant stability, energy density, life characteristics and Coulombic efficiency.

公开(公告)号：US20230411688A1

公开(公告)日：2023-12-21

申请号：US18030975

申请日：2021-11-30

申请人： LG ENERGY SOLUTION, LTD.

发明人： Jeong-Beom LEE ,  Ye-Eun KIM ,  Seok-Koo KIM ,  Je-Young KIM

IPC分类号： H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/0525 ,  C07C309/65 ,  C07C309/06

CPC分类号： H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2300/0037 ,  C07C309/65 ,  C07C309/06 ,  H01M2300/0028 ,  H01M10/0525

摘要： An electrolyte for a lithium secondary battery including a wettability-improving additive having a trifluoromethylsulfonyl group. The electrolyte has reduced surface tension to improve the wettability of an electrode assembly with the electrolyte. Therefore, it is possible to ensure high electrolyte wettability even when the electrolyte includes a high-boiling point solvent or a high concentration of lithium salt.

公开(公告)号：US20230017977A1

公开(公告)日：2023-01-19

申请号：US17946250

申请日：2022-09-16

申请人： LG ENERGY SOLUTION, LTD. ,  THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

发明人： Jeong-Beom LEE ,  Hye-Ri JUNG ,  Hyea-Eun HAN ,  Hoe-Jin HAH ,  Sung-Rok BANG ,  Ying Shirley MENG ,  Huan Shen Darren TAN

IPC分类号： H01M4/38 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/40 ,  H01M10/058

摘要： A solid state battery is described, which has a negative electrode having a negative electrode active material layer including silicon (Si) as a negative electrode active material. The Si may be present as particles, e.g., microparticles, having an average particle size (D50) of 0.1 μm to 10 μm. The negative electrode active material layer may include the silicon (Si) in an amount of 75 wt % or more, 95 wt % or more, 99 wt % or more, or 99.9 wt % or more, based on 100 wt % of the negative electrode active material layer. The negative electrode active material layer can be free or substantially free of conductive material, carbon, solid state electrolyte, and/or binder. Preferably, after charge/discharge cycles, the negative electrode active material layer forms densified and interconnected large particles of Li—Si alloy, e.g., the Li—Si alloy may have at least one columnar structure and at least one void.