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Area of Science:

  • Materials Science
  • Energy Harvesting
  • Nanotechnology

Background:

  • Triboelectric nanogenerators (TENGs) are effective for ambient energy harvesting but are sensitive to environmental factors.
  • Traditional TENGs face limitations in application range due to environmental susceptibility.

Purpose of the Study:

  • To develop flexible TENGs with stable output performance (SOP-TENGs) by introducing a new coupling mechanism.
  • To utilize natural materials for enhanced TENG functionality and environmental resilience.

Main Methods:

  • A novel coupling mechanism combining electrostatic induction and ion conduction was proposed.
  • Calcium chloride doped-cellulose nanofibril (CaCl2-CNF) film derived from carrots was synthesized and utilized.
  • Electrical measurements were conducted to investigate the effects of moisture, humidity, and electrode size.

Main Results:

  • The CaCl2-CNF film acted as both a triboelectric layer and an electrode, enabling a compound transfer mechanism of ions and electrons.
  • The SOP-TENG demonstrated super-stable electrical output under varying moisture content and relative humidity.
  • Performance was superior to conventional hydrogel ionotronic TENGs that rely solely on moisture for ion transfer.

Conclusions:

  • The proposed SOP-TENG design overcomes environmental limitations of traditional TENGs.
  • The coupling of electrostatic induction and ion conduction in natural hydrogel-based devices broadens applications for energy harvesting.
  • This technology enables reliable power supply for low-power electronics in complex environments.