POS6-1443
Property of Polyurethane Binder with Different Crosslinking Densities for Silicon Anode
Topic
S6. Emerging Polymer and Hybrid Materials for Advanced Energy Storage and Conversion
When and Where
Oct 1, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Jinkee HONG
Ki Su KIM
Presenter(s)
Subin Park (Pusan National University)
Co-Author(s)
Abstract
Li-ion batteries have emerged as indispensable energy storage devices for portable electronics, electric vehicles, and energy storage systems. However, graphite electrodes do not satisfy the performance requirements of modern high-performance batteries due to the low capacity, high cost, and limited power output. To address these demands, silicon anodes have attracted great attention because of their exceptionally high theoretical capacity. However, in order to commercialize silicon anodes, it is important to suppress their drastic volume expansion during operation.
In this study, polyurethane (PU) binders with different crosslinking densities were synthesized for silicon anodes. The urethane groups of PU form hydrogen bonds with the silanol groups on the silicon surface, enabling strong interfacial interaction. The electrochemical performance of the battery was evaluated according to the crosslinking density of PU. PU binder with high crosslinking density effectively suppressed the extreme volume expansion of silicon particles, lowered interfacial resistance, and exhibited a high capacity retention rate.
In this study, polyurethane (PU) binders with different crosslinking densities were synthesized for silicon anodes. The urethane groups of PU form hydrogen bonds with the silanol groups on the silicon surface, enabling strong interfacial interaction. The electrochemical performance of the battery was evaluated according to the crosslinking density of PU. PU binder with high crosslinking density effectively suppressed the extreme volume expansion of silicon particles, lowered interfacial resistance, and exhibited a high capacity retention rate.
