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HIGH PERFORMANCE TRIBOELECTRIC NANOGENERATOR AND ITS APPLICATIONS

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HIGH PERFORMANCE TRIBOELECTRIC NANOGENERATOR AND ITS APPLICATIONS ( high-performance-triboelectric-nanogenerator-and-its-applica )

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CHAPTER 6. CONCLUSION In this dissertation, my major research achievements as a Ph.D. student at Georgia Tech have been presented. One major goal of my research is to develop high performance TENG with desired merits including higher power density and energy efficiency, better mechanical property, and versatile functionality. The other major goal is to find novel applications of TENG that can provide affordable, safe, and convenient solutions for energy challenges in IoT. In this chapter, I will briefly summarize my achievements and propose a roadmap of TENG research that provides a guideline for future endeavors in the field. 6.1 High Performance TENG High performance TENG with targeted merits including higher power density, better mechanical property, and versatile functionality, has been pursued. A method for increasing triboelectric charge density and thus power density by coupling surface polarization from triboelectrification and hysteretic dielectric polarization from ferroelectric material in vacuum (P ~ 10-6 torr) was reported. Without the constraint of air breakdown, a record-high triboelectric charge density of 1003 μC/m2, which is one magnitude higher than previously reported values and close to the limit of dielectric breakdown, has been attained. The concept of spring-based mechanical amplifier was introduced into the emerging field of TENG to improve its performance in harvesting low- frequency vibration energy, and the resulted features of amplified frequency and displacement achieved a performance boost up to 10 times in terms of average output power, which is of great importance for future progress towards the highly anticipated 160

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