fig3

Figure 3. Advanced polymeric binders for Si anodes: enhancing structural stability and tailoring SEI chemistry. (A) Schematic illustration of the POWPU binder structure and its role in electrode stabilization. (B) XPS spectra of C 1s (Si/POWPU) and F 1s (Si/PVDF) electrodes before and after purification. Cross-sectional SEM images of (C) POWPU and (D) PVDF electrodes, pristine and after 100 cycles. Reproduced with permission^[67]. (E) Proposed mechanism of PVAm interaction with Si particles. (F) FT-IR spectra of the Si/PVAm anodes with different cutoff voltages. (G) XPS spectra of Li 1s of Si/PVDF, Si-PVA and Si/PVAm anodes. Stress distribution on Si particles in (H) Si/PVA and (I) Si/PVAm anodes. Reproduced with permission^[68].