POS6-1398
Multifunctional ROMP-Derived Polymer Binders for Stable and High-Performance Silicon Anodes
When and Where
Nov 30, -0001
00:00 - 00:00
Room 301 (Grand Ballroom)
Presenter(s)
Cheol Shin (Hanyang University)
Co-Author(s)
Abstract
Silicon (Si) anodes undergo severe volumetric fluctuations during repeated lithiation/delithiation, which compromises electrode integrity and interfacial contact with the current collector. To overcome this issue, the development of binders employing various strategies has been demanded. Although ring-opening metathesis polymerization (ROMP) offers high molecular weight and post-polymerization functionalization, ROMP-derived polymers have received limited attention as binders for Si anodes. In this work, pendant anhydride moieties on a ROMP-generated polymer backbone were sequentially converted into dicarboxylic acid and polyethylene glycol (PEG) groups to balance mechanical robustness, flexibility, adhesion to the current collector, and ionic conductivity. The optimized binder, designated P-PEG10, exhibited an initial reversible capacity of 2495 mAh g−1 and retains 1680 mAh g−1 after 250 cycles, corresponding to 72.8% capacity retention. Moreover, the electrode exhibits only 3% thickness expansion after the first cycle, compared with the 50% expansion observed for a PVDF-based reference electrode. These results demonstrate the potential of ROMP-derived polymers as multifunctional binders capable of stabilizing electrode structure in high-performance Si anodes.
