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Electron Transfer as a Liquid Droplet Contacting a Polymer Surface.

Fei Zhan1,2, Aurelia C Wang3, Liang Xu1,2

  • 1Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.

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|November 24, 2020
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Summary

Researchers investigated electrification mechanisms in liquid-based triboelectric nanogenerators (TENGs). They discovered a hybrid charge transfer model involving electron transfer and ion adsorption at the liquid-solid interface.

Keywords:
Wang’s hybrid layercontact electrificationelectric double layerelectron transferliquid−solidtriboelectric nanogenerator

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Area of Science:

  • Energy Harvesting
  • Materials Science
  • Physical Chemistry

Background:

  • Liquid-based triboelectric nanogenerators (TENGs) show potential for significant electric power generation.
  • The fundamental mechanisms of electrification between liquid and solid surfaces require further investigation.

Purpose of the Study:

  • To elucidate the working mechanism of a droplet-TENG.
  • To identify and verify the charge-transfer mechanisms at the liquid-solid interface.

Main Methods:

  • Studied the dynamic saturation process of a droplet-TENG.
  • Employed a method to verify the charge-transfer mechanism at the liquid-solid interface.

Main Results:

  • Proposed a working mechanism for droplet-TENGs based on dynamic saturation.
  • Verified charge transfer as a hybrid of electron transfer and ion adsorption.
  • Introduced 'Wang's hybrid layer' model for liquid-solid interface charge distribution.

Conclusions:

  • TENGs can serve as probes for studying charge transfer across various interfaces (solid-solid, liquid-solid).
  • Findings have implications for water energy harvesting.
  • This work may reshape the understanding of liquid-solid interfaces in diverse scientific fields.