POS6-0944
Bifunctional Polyamide-Imidazole Binder for Silicon Anodes via Dual Interactions with Silicon Particles and Conductive Carbon
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
seungeon Oh (Hanyang University)
Co-Author(s)
Abstract
Silicon (Si) is attracting attention as a next-generation lithium-ion battery anode material with high theoretical capacity, but it presents the problem of significant volume expansion. While various polymer binders are being studied to address this, research on their interactions with conductive materials is relatively lacking.
In this study, we designed a bifunctional polyamide-imidazole (PAID) binder capable of strongly bonding with both Si particles and conductive materials. Through thermal reaction, the structure was sequentially converted from p-PAID to i-PAID, which contains amide, amine, imide, and imidazole functional groups, and finally to a fully aromatized ladder-structure PAID. The i-PAID binder formed strong binding strength with the Si, while the π-conjugated aromatic structure effectively maintained the conduction pathway through π–π stacking interactions with carbon black. Electrochemical performance results showed that the i-PAID-based Si anode exhibited improved initial reversible capacity and Coulomb efficiency compared to conventional polyimide binders. This study presents a design strategy for a bifunctional polymer binder capable of simultaneously combining Si particles and conductive materials. It is expected to contribute to improving the long-term stability of silicon anodes for high-energy-density lithium-ion batteries.
In this study, we designed a bifunctional polyamide-imidazole (PAID) binder capable of strongly bonding with both Si particles and conductive materials. Through thermal reaction, the structure was sequentially converted from p-PAID to i-PAID, which contains amide, amine, imide, and imidazole functional groups, and finally to a fully aromatized ladder-structure PAID. The i-PAID binder formed strong binding strength with the Si, while the π-conjugated aromatic structure effectively maintained the conduction pathway through π–π stacking interactions with carbon black. Electrochemical performance results showed that the i-PAID-based Si anode exhibited improved initial reversible capacity and Coulomb efficiency compared to conventional polyimide binders. This study presents a design strategy for a bifunctional polymer binder capable of simultaneously combining Si particles and conductive materials. It is expected to contribute to improving the long-term stability of silicon anodes for high-energy-density lithium-ion batteries.
