HF-Free Synthesis of High-Entropy MXene-PVA Composite Film and Its Flexible Nanogenerator

• • The device generates 500 mV and 790 pA under 3.47 N compressive force, enabling self-powered operation for wearable sensors without external bias. • • Long-term functionality over 1500 cycles demonstrates mechanical robustness, critical for continuous monitoring in bioelectronics. • • Output power reaches 110.76 pW, sufficient for low-power wearable devices, though higher power density is needed for broader applications. • • HF-free etching ensures biocompatibility and safety, addressing toxicity concerns of conventional HF etching for clinical translation.