Journal
NANO ENERGY
Volume 85, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2021.106021
Keywords
Triboelectric nanogenerator; Sponge structure; Fluorination; Humidity-stability; Wearable bioelectronics
Categories
Funding
- National Natural Science Foundation of China, China (NSFC) [21875200]
- Hong Kong Research Grants Council/General Research Fund, Hong Kong, China [11206520]
- Henry Samueli School of Engineering & Applied Science
- Department of Bioengineering at the University of California, Los Angeles, United States
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We have developed a fluorinated polymer sponge based triboelectric nanogenerator (FPS-TENG) that provides stable electrical output and high durability, outperforming traditional TENG. When assembled with hydrophobic copper contact electrodes, FPS-TENG retains almost 90% electrical output over 20-85% relative humidity.
Human body contains various biomechanical energy, which emerges as a pervasive and sustainable energy resource for wearable electronics in the era of Internet of Things. We have developed a fluorinated polymer sponge based triboelectric nanogenerator (FPS-TENG) that provides stable electrical output over a wide range of ambient humidity. The humidity resistance due to excellent hydrophobic property of the fluorinated polymer sponge can overcome the adverse effects of moisture. The FPS-TENG also exhibits high durability even after enduring heavy abrasion. The output voltage of the FPS-TENG is three times higher than that of the pristine polymer film (PPF) based TENG. When assembled with hydrophobic copper (HC) contact electrodes, the FPS-TENG retains almost 90% electrical output over 20-85% relative humidity. Moreover, super durability is achieved by quasi-bulk-phase functionalization. After 1 mm-thickness abrasion of the fluorinated polymer sponge, the output voltage is degraded by only 10%. Under the optimal operating conditions, the FPS-TENG delivers a maximum power density of 0.89 W m(-2) at a load resistance of 10 MO. The fluorination enhanced tribo-electrification and the surface superhydrophobicity induced humidity-stability make the FPS-TENG a sustainable power source for the wearable bioelectronics in the era of Internet of Things.
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