Bio-triboelectric
nanogenerators have attracted much attention
due to their applications in wearable and implantable electronic devices.
Recently, cellulose-based nanogenerators have become a competing research
topic, while the low output performance limits their application.
In this work, an eco-friendly and recyclable bacterial cellulose-based
triboelectric nanogenerator (BC-TENG) with enhanced output performance
was represented. The surface potential of BC film was controlled by
dip-coating hydroxyethyl cellulose (HEC) solution. After dip-coating,
the maximum short-circuit current, open-circuit voltage, and transferred
charge of 8.68 μA, 76.61 V, and 26.92 nC of the BC/HEC-TENG
were achieved, respectively, much higher than those of pure BC-TENG.
Additionally, the TENG demonstrated outstanding electrical output
stability and durability, and it is effectively capable of serving
as a self-powered sensor to detect human movement posture and power
electronics. This work confirms the feasibility of manipulating the
surface potential as an effective way of developing high-performance
TENGs and offers insights for designing novel bio-tribomaterial in
the advancement of eco-friendly TENGs.