Hybridizing Triboelectric and Thermomagnetic Effects: A Novel Low-Grade Thermal Energy Harvesting Technology

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Joana Oliveira (Author) FEUP; Ana Pires (Author) Other; Isabel Gonçalves (Author) Other; Daniel Silva (Author) Other; Cátia Rodrigues (Author) Other; André Pereira (Author) FCUP; João Ventura (Author) Other

Journal

The Journal is awaiting validation by the Administrative Services.

Title: ADVANCED FUNCTIONAL MATERIALS

Vol. 32

Pages: 1-8

ISSN: 1616-301X

Indexing

ISI Web of Knowledge - 24 Citations

Scopus - 24 Citations

Other information

Authenticus ID: P-00W-3NM

DOI: 10.1002/adfm.202110288

Abstract (EN): Developing new energy generation technologies able to effectively convert low-grade thermal energy into electricity is an urgent necessity to tackle the continuous surge in energy demand and mitigate climate change. Here, a hybrid device that couples triboelectric and thermomagnetic effects to generate electrical power in the presence of small temperature gradients near room temperature is demonstrated. The thermomagnetic effect allows to induce the periodic and sustained motion of a second-order ferromagnetic material in temperature gradients below 30 degrees C. This mechanical motion is then converted into electrical energy using a low-cost triboelectric nanogenerator (TENG). The applicability of this concept is demonstrated in a broad range of operating temperatures in both the cold (15 to 37 degrees C) and hot (60 to 90 degrees C) sides. It is further shown that the electrical power generated by the hybrid TENG is more than 35x higher than that obtained by a conventional thermomagnetic generator driven by magnetic induction. The obtained results show that this implementation is a feasible thermal energy conversion technology, further expanding the applicability of triboelectricity into the realm of room temperature thermal harvesting.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8