posted on 2022-12-15, 18:40authored byZehua Peng, Xiao Xiao, Jianxin Song, Alberto Libanori, Ching Lee, Keda Chen, Yuan Gao, Yunsheng Fang, Juan Wang, Zuankai Wang, Jun Chen, Michael K. H. Leung
High relative permittivity and low dielectric loss are
two desired
parameters of a triboelectric layer to enhance its mechanical-to-electrical
energy conversion efficiency in a triboelectric nanogenerator (TENG).
However, the elevated permittivity of the triboelectric layer is always
accompanied by increasing dielectric loss, limiting further improvement
or even reducing the electrical output. Herein, we report a method
for improving the relative permittivity and suppressing the dielectric
loss of the triboelectric layer via nanoscale design at the particle–polymer
interface. When incorporated with 2 wt % Ag@C, the triboelectric-layer-enhanced
TENG (TLE-TENG) presents a 2.6-fold increment in relative permittivity
and a 302% current enhancement. An instantaneous peak power density
of 1.22 W m–2, an excellent pressure sensitivity
of 90.95 V kPa–1, and an optimized sheet resistance
(∼0.14 Ω/sq) are attributes of this
greatly enhanced device. Such improvements bode well for the implementation
of these enhancing strategies to help position TLE-TENGs as pervasive
and sustainable power sources and active self-powered sensors in the
era of the Internet of Things.