Boosting piezoelectric and triboelectric effects of PVDF nanofiber through carbon-coated piezoelectric nanoparticles for highly sensitive wearable sensors
May 16, 2021
Publication
- May 16, 2021
- Boosting piezoelectric and triboelectric effects of PVDF nanofiber through carbon-coated piezoelectric nanoparticles for highly sensitive wearable sensors
Piezoelectric and triboelectric effects are vital mechanisms in motion sensing. Improving both the piezoelectric
performance and triboelectric effect for a single material is an important approach to further improve the
sensitivity of the sensor. Herein, we achieve the enhancement of both effects in electrospun polyvinylidene
fluoride (PVDF) nanofiber by simply adding carbon-coated zinc oxide (ZnO@C) nanoparticles as additive. We
found that ZnO@C can not only increase the β-phase in PVDF, resulting in an enhanced piezoelectric coefficient.
It also negatively shifted the surface potential of PVDF to a high value of 740 mV, thereby modifying the
triboelectric effect. The fabricated ZnO@C/PVDF nanogenerator exhibits 4 times enhancement in the voltage
output, thus resulting in high sensitivity of 0.98 V kPa 1 when used as wearable sensors. Due to the good mechanical
properties of nanofibers, we also demonstrated the application of ZnO@C/PVDF nanogenerator as body
motion sensor with excellent deformation stability. Therefore, adding carbon-coated piezoelectric nanoparticles
provides an effective approach to simultaneously enhance the piezoelectric and triboelectric effects of ferroelectric
polymer for highly sensitive wearable sensors.
Researcher/Author: Xiaoxia Li, Dongxiao Ji, Bingxue Yu, Rituparna Ghosh, Jihuan He, Xiaohong Qin, Seeram Ramakrishna
Chemical Engineering Journal 426 (2021) 130345; https://doi.org/10.1016/j.cej.2021.130345
Researcher/Author: Xiaoxia Li, Dongxiao Ji, Bingxue Yu, Rituparna Ghosh, Jihuan He, Xiaohong Qin, Seeram Ramakrishna
Chemical Engineering Journal 426 (2021) 130345; https://doi.org/10.1016/j.cej.2021.130345