TY - JOUR
T1 - Natural Silkworm Cocoon-Based Hierarchically Architected Composite Triboelectric Nanogenerators for Biomechanical Energy Harvesting
AU - Wang, Qian
AU - Xu, Bingang
AU - Huang, Junxian
AU - Tan, Di
N1 - Funding Information:
The authors would like to acknowledge the Research Institute for Intelligent Wearable Systems of The Hong Kong Polytechnic University for funding support (project no. 1-CD43) of this work. Wang Qian would also like to thank The Hong Kong Polytechnic University for providing her with a postgraduate scholarship.
Publisher Copyright:
© 2023 American Chemical Society.
PY - 2023/2/8
Y1 - 2023/2/8
N2 - Silk-based triboelectric nanogenerators (TENGs) have been demonstrated as an ideal platform for self-powered systems. The source of silk, Bombyx mori, entails a valuable ingredient, sericin (SS), viewed as a binder in composites. Interestingly, SS is rich in amorphous region when subject to external pressure. However, most researchers remove the SS component when designing silk-TENGs to eliminate immunological responses as implantation in vivo through complicated degumming, rehydration, and dialysis procedures. Herein, integral SS retention was utilized to fabricate silk-TENGs without affecting the output performance. We designed, for the first time, an ultra-robust and natural silkworm cocoon layer (SCL)/polydimethylsiloxane (PDMS)-TENG as an energy harvester to scavenge waste energy from human motions. The working mechanisms and influence of operational parameters are explored and studied. Working in the contact-separation mode, the electrical outputs of the SCL/PDMS-TENG in terms of open-circuit voltage, short-circuit current, and power density reaches 126 V, 3 μA, and 216 mW/m2, respectively. The integrated self-charging TENG is demonstrated to power small electronic electronics and monitor human motions. This work widens a new dielectric material selection with SS retention to boost the output performance of TENGs for practical applications.
AB - Silk-based triboelectric nanogenerators (TENGs) have been demonstrated as an ideal platform for self-powered systems. The source of silk, Bombyx mori, entails a valuable ingredient, sericin (SS), viewed as a binder in composites. Interestingly, SS is rich in amorphous region when subject to external pressure. However, most researchers remove the SS component when designing silk-TENGs to eliminate immunological responses as implantation in vivo through complicated degumming, rehydration, and dialysis procedures. Herein, integral SS retention was utilized to fabricate silk-TENGs without affecting the output performance. We designed, for the first time, an ultra-robust and natural silkworm cocoon layer (SCL)/polydimethylsiloxane (PDMS)-TENG as an energy harvester to scavenge waste energy from human motions. The working mechanisms and influence of operational parameters are explored and studied. Working in the contact-separation mode, the electrical outputs of the SCL/PDMS-TENG in terms of open-circuit voltage, short-circuit current, and power density reaches 126 V, 3 μA, and 216 mW/m2, respectively. The integrated self-charging TENG is demonstrated to power small electronic electronics and monitor human motions. This work widens a new dielectric material selection with SS retention to boost the output performance of TENGs for practical applications.
KW - energy harvesting
KW - hierarchical structure
KW - silkworm cocoon
KW - stacked effect
KW - triboelectric nanogenerator
UR - http://www.scopus.com/inward/record.url?scp=85147807371&partnerID=8YFLogxK
U2 - 10.1021/acsami.2c19233
DO - 10.1021/acsami.2c19233
M3 - Journal article
AN - SCOPUS:85147807371
SN - 1944-8244
VL - 15
SP - 9182
EP - 9192
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 7
ER -