fig5

Figure 5. Chemical structures of synthetic polymer-based binders and their effects on Si anode performance. (A) PVDF; (B) PAA; (C) PVA. PVDF-based binder strategies; (D) Cross-sectional SEM images of Si-graphite/PVDF composite electrodes before and after the first cycle at various temperatures, along with the corresponding cycling performance of the Si anode. Adapted with permission from ref.^[82]; (E) Introduction of Si-functional groups via an azide-nitrile click reaction on a PAN-based polymer and the resulting electrochemical performance. Adapted with permission from ref.^[87]; (F) Schematic illustration of ion transport pathways and structural evolution in PAA@Si and PPD PAA@Si electrodes during cycling. The long-term cycling performance of Si electrodes using PAA, CMC SBR, and PPD PAA binders at a current density of 1.2 A g^-1 is also presented. Adapted with permission from ref.^[39].