ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

With the ever-growing development of miniature electronics, self-charging technology is highly essential, and wearable thermoelectric (TE) microgenerators are up to this task. However, currently existing TE materials device structures seldom achieve both high flexibility output properties simultaneously. This study presents an advanced strategy for fabricating flexible films stretchable three-dimensional (3D) generator (TEG) devices. A scalable approach was employed construct foldable helical-structured devices with exceptional stretchability thermal management capabilities, enabling open-air channels maintain temperature gradients without external heatsinks. By optimizing composition Bi2Te3, PEDOT: PSS, multiwalled carbon nanotubes (MWCNTs), polyurethane (PU), a balance between performance wearability achieved. The composite film demonstrated mechanical endurance─resistance change ratios below 3% after 1,500 bending cycles (4 mm radius). 3D helical TEG exhibited remarkable stability only 6% voltage reduction 0.7% resistance increase under 20% strain. Even at minimal ΔT ∼3 K, retained stable 1.3 mV, highlighting its practicality low-grade heat harvesting. work provides effective way develop opens meaningful dialogue on structural innovation energy

Language: Английский