Liquid metal-integrated polyimide nanofibers for high-temperature triboelectric energy harvesting
MATERIALS RESEARCH BULLETIN, cilt.205, 2027 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 205
- Basım Tarihi: 2027
- Doi Numarası: 10.1016/j.materresbull.2026.114397
- Dergi Adı: MATERIALS RESEARCH BULLETIN
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Erciyes Üniversitesi Adresli: Evet
Özet
Triboelectric nanogenerators (TENGs) capable of operating at elevated temperatures remain constrained by charge dissipation and the poor thermal stability of conventional polymer dielectrics. Here, liquid metal (LM)integrated polyimide (PI) nanofibers are developed as a thermally robust triboelectric platform for harshenvironment energy harvesting. Gallium-based LM nanospheres are incorporated into electrospun PI nanofibers through a sonication-assisted dispersion strategy, producing uniform composite membranes while preserving the fibrous architecture. Structural and surface analyses reveal that LM incorporation drastically modulates the local electrostatic environment of the fibers, consistent with enhanced interfacial polarization and charge trapping. Among the investigated formulations, the membrane containing 5 wt% LM delivers the optimal ambient triboelectric output, achieving an open-circuit voltage (Voc) of 8.40 V, improved capacitor charging behavior, and stable operation over 10,000 cycles. Under elevated-temperature testing, the output exhibited a positive temperature dependence, reaching a maximum Voc of 11.76 V at 200 degrees C before declining at higher temperatures, while measurable output was sustained up to 300 degrees C.