Synergistic Microstructure and Dielectric Engineering of Recyclable Single‐Electrode Triboelectric Nanogenerators for Sustainable Smart Homes

The performance of single‐electrode triboelectric nanogenerators (SE‐TENGs) is governed by the effective contact area and dielectric properties. Synergistically optimizing both within a sustainable design remains challenging. Herein, a recyclable SE‐TENG is presented through the synergistic integration of a pseudo‐honeycomb microstructure and liquid metal (LM) doping. The template‐assisted electrospun microstructure significantly enhances the contact area for efficient charge generation, while the dispersed LM nanoparticles significantly enhance the dielectric properties for superior charge trapping and transport. This approach enhances the open‐circuit voltage by 120% (from 70.8 to 156 V) and achieves a power density of 122 mW m −2 . Furthermore, the use of a recyclable polymer matrix enables a closed‐loop recycling pathway, with the device retaining over 90% of its initial output after seven cycles. Its practical utility is demonstrated through programmable wireless switching, time‐verifiable access control, and assistive monitoring for speech‐impaired users in a self‐powered smart home system. This work provides a foundational design paradigm for customizable, high‐performance, and sustainable electronics.