Synergistic β-Phase Enhancement and Amorphization in PVDF-Based Solid Polymer Electrolytes Enabled by Femtosecond Laser Irradiation

) relative to pristine films. Solid-state cells employing the laser-processed electrolytes exhibit improved cycling stability, achieving ∼11% higher capacity retention after 200 cycles. This work establishes femtosecond laser-induced spatial phase regulation as a powerful, solvent-free route to synergistically modulate amorphous and polar crystalline phases in PVDF, offering a promising route toward high-performance solid-state energy storage technologies.