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Liquid metal–integrated polyimide nanofibers for high-temperature triboelectric energy harvesting

Journal Article (2027)
Author(s)

Peng Wu (Deakin University)

Kamyar Shirvanimoghaddam (Royal Melbourne Institute of Technology University)

İlhan Özen (Erciyes University)

Nauman Ali Choudhry (Royal Melbourne Institute of Technology University)

Agnieszka Kooijman (TU Delft - Mechanical Engineering)

Prasaanth Ravi Anusuyadevi (TU Delft - Mechanical Engineering)

Peyman Taheri (TU Delft - Mechanical Engineering)

Minoo Naebe (Deakin University)

Research Group
Team Arjan Mol
DOI related publication
https://doi.org/10.1016/j.materresbull.2026.114397 Final published version
More Info
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Publication Year
2027
Language
English
Research Group
Team Arjan Mol
Journal title
Materials Research Bulletin
Volume number
205
Article number
114397
Downloads counter
16
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Abstract

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 harsh-environment 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 °C before declining at higher temperatures, while measurable output was sustained up to 300 °C.