公开(公告)号：US20240204189A1

公开(公告)日：2024-06-20

申请号：US18498522

申请日：2023-10-31

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Sang Gil WOO ,  Je Nam LEE

IPC: H01M4/583 ,  H01M4/38 ,  H01M10/052

CPC classification number: H01M4/583 ,  H01M4/386 ,  H01M10/052 ,  H01M2004/027

Abstract: A negative electrode is proposed. The negative electrode may contain two types of silicon-based materials to improve both energy density and lifespan characteristics, and can be used for a lithium secondary battery. The negative electrode may include a carbon-based material and two types of silicon-based materials with different physical properties, sizes, and shapes.

公开(公告)号：US20240170675A1

公开(公告)日：2024-05-23

申请号：US18489566

申请日：2023-10-18

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Je Nam LEE ,  Sang Gil WOO

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/58 ,  H01M4/583 ,  H01M10/052

CPC classification number: H01M4/623 ,  H01M4/364 ,  H01M4/5815 ,  H01M4/583 ,  H01M10/052 ,  H01M2004/028

Abstract: A binder for a lithium-sulfur electrode is proposed. The binder can improve the capacity and lifespan characteristics of a lithium-sulfur secondary battery by suppressing the shuttle reaction due to the elution of polysulfide through the interaction of lithium polysulfide while maintaining the binding characteristics of the binder. This binder may be used for a positive electrode and a lithium-sulfur secondary battery. The binder may include a modified polyvinylidene fluoride (PVdF)-based binder that is soluble in an organic solvent. The modified PVdF-based binder may include a PVdF-based main chain and a functional group having a carboxylic group or carbonyl group grafted as a side chain.