Leveraging Synergies by Combining Polytetrafluorethylene with Polyvinylidene Fluoride for Solvent?Free Graphite Anode Fabrication

Solvent-free graphite anode is fabricated successfully with the synergistic effect of polytetrafluorethylene (PTFE) and polyvinylidene fluoride (PVDF). PTFE acts as a processing aid reagent to form self-supporting electrode film, while PVDF functional binder when decomposes in first lithiation process. The solvent-free high loading 15 mg cm?2 shows good stability more than 95% capacity retention after 50 charge/discharge cycles under current 0.23 mA cm?2. Electrodes extra 27 (8.2 mAh cm?2) are show stability. Initial coulombic efficiency increases 89% prelithiation full cell lithium iron phosphate cathode. cells 80% 110 0.7 coin cells. roll-to-roll production makes procedure compatible commercial lithium-ion batteries lines, exhibiting great potential for upscaling production.