POS6-0345
Dual-Functional Graft Copolymer Binders for High-Nickel Cathode Materials in Lithium-Ion Batteries
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
Jimin Park (Seoul National University)
Co-Author(s)
Abstract
Nickel-rich layered oxides are widely regarded as promising cathode materials for next-generation lithium-ion batteries due to their high energy density. However, rapid capacity fading induced by structural degradation and hindered lithium-ion transport at the electrode-electrolyte interface remains a persistent challenge. To address these complex issues, this study proposes a novel dual-functional graft copolymer binder based on a polyvinylidene fluoride (PVDF) backbone. This precisely engineered copolymer features two functional side chains that stabilize the NCM cathode. The first side chain, rich in carboxylic acid groups, forms an extensive hydrogen-bonding network with active materials, providing robust interfacial adhesion and structural integrity while effectively suppressing volume expansion and microcrack generation. Simultaneously, the second side chain, functionalized with zwitterionic groups, significantly enhances interfacial compatibility and facilitates smooth lithium-ion transport through the binder matrix. We demonstrated that the synergistic interaction of these two side chains effectively preserves the structural stability of the electrode, ensuring enhanced long-term cycling stability.
