Surficial Amide-enabled Integrated Polymer-based organic Anode–Binder Electrode for Electrochemical Reversibility and Fast Redox Kinetics in Lithium–Ion Batteries
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초록
내용
In this study, we propose an integrated organic anode–binder system from small molecule to polymer. It comprises a redox-active benzene group for highly stable and fast lithium-ion batteries via chemical cross-linking of the aromatic redox-active molecule with the poly(acrylic acid) binder. The surficial amide linkage not only suppresses electrolyte dissolution but also increases the lithium-ion reaction kinetics of the benzene ring with high reversible capacity. The lowered lowest unoccupied molecular orbital level and lithium-ion induction effect reduce the charge transfer and interface resistance, significantly outperforming the traditional electrode system with a poly(vinylidene fluoride) binder. This strategy is successfully expanded to polymeric system of polyimide microparticles possessing additional redox-active imide moiety along with benzene rings in their backbone. This work suggests a new strategy of providing additional capacity through reaction kinetics enhancement for multiscale redox-active organic materials.