1. Visualization and standardized quantification of surface charge density for triboelectric materials.
- Author
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Li, Yi, Luo, Yi, Xiao, Song, Zhang, Cheng, Pan, Cheng, Zeng, Fuping, Cui, Zhaolun, Huang, Bangdou, Tang, Ju, Shao, Tao, Zhang, Xiaoxing, Xiong, Jiaqing, and Wang, Zhong Lin
- Subjects
ELECTROSTATIC induction ,SURFACE charges ,NANOGENERATORS ,TRIBOELECTRICITY ,SURFACE potential ,CORONA discharge ,POLYTEF - Abstract
Triboelectric nanogenerator (TENG) operates on the principle of utilizing contact electrification and electrostatic induction. However, visualization and standardized quantification of surface charges for triboelectric materials remain challenging. Here, we report a surface charge visualization and standardized quantification method using electrostatic surface potential measured by Kevin probe and the iterative regularization strategy. Moreover, a tuning strategy on surface charge is demonstrated based on the corona discharge with a three-electrode design. The long-term stability and dissipation mechanisms of the injected negative or positive charges demonstrate high dependence on deep carrier traps in triboelectric materials. Typically, we achieved a 70-fold enhancement on the output voltage (~135.7 V) for the identical polytetrafluoroethylene (PTFE) based TENG (neg-PTFE/PTFE or posi-PTFE/PTFE triboelectric pair) with stable surface charge density (5% decay after 140 days). The charged PTFE was demonstrated as a robot e-skins for non-contact perception of object geometrics. This work provides valuable tools for surface charge visualization and quantification, giving a new strategy for a deeper understanding of contact electrification. A surface charge visualization and standardized quantification method and surface charge tuning is achieved for triboelectric materials, delivering essential tools for contact electrification and high-performance triboelectric nanogenerators. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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