TY - JOUR
T1 - Silk and Silk Composite Aerogel-Based Biocompatible Triboelectric Nanogenerators for Efficient Energy Harvesting
AU - Mi, Hao Yang
AU - Li, Heng
AU - Jing, Xin
AU - He, Ping
AU - Feng, Pei Yong
AU - Tao, Xiaoming
AU - Liu, Yuejun
AU - Liu, Chuntai
AU - Shen, Changyu
N1 - Funding Information:
The authors would like to acknowledge the financial support of the National Natural Science Foundation of China (51603075; 21604026) and the support of the following two grants from the Research Grants Council of Hong Kong: (1) “Proactive monitoring of work-related MSD risk factors and fall risks of construction workers using wearable insoles” (PolyU 152099/18E) and (2) in search of a suitable tool for proactive physical fatigue assessment: an invasive to noninvasive approach. (PolyU 15204719/18E); Sichuan Science and Technology Program (2020YFH0124).
Funding Information:
The authors would like to acknowledge the financial support of the National Natural Science Foundation of China (51603075; 21604026) and the support of the following two grants from the Research Grants Council of Hong Kong: (1) ?Proactive monitoring of work-related MSD risk factors and fall risks of construction workers using wearable insoles? (PolyU 152099/18E) and (2) in search of a suitable tool for proactive physical fatigue assessment: an invasive to noninvasive approach. (PolyU 15204719/18E); Sichuan Science and Technology Program (2020YFH0124).
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/7/8
Y1 - 2020/7/8
N2 - Triboelectric nanogenerators (TENGs) with high performance and biocompatibility are of demand for the development of novel medical devices and wearable electronics. Herein, a highly porous silk aerogel-based TENG (STENG) with high output performance was developed using silk fibroins extracted from silk cocoons. The silk aerogel made of 2% silk fibroin solution showed a nanofibrillated porous structure and the highest surface area, which contributed to the high triboelectric output performance of the STENG based on it. The rough surface and highly porous structure facilitated charge generation of the aerogels. The optimized STENG achieved an open circuit voltage of 52.8 V and a short circuit current of 5.2 μA, and a maximum power density of 0.37 W/m2 was reached on a 1 Mω external resistor. The STENG possesses high stability under different operation frequencies and in long term, and it could act as a power source for small electronics. Moreover, the excellent biocompatibility of silk aerogels to human cells makes the STENG possible to be used as implantable energy harvesters. In addition, because of its high tribopositivity, silk can be used as additives to fabricate composite aerogels. With an addition of 20% silk, the power of cellulose nanofibril-based TENGs improved by 3.1 times.
AB - Triboelectric nanogenerators (TENGs) with high performance and biocompatibility are of demand for the development of novel medical devices and wearable electronics. Herein, a highly porous silk aerogel-based TENG (STENG) with high output performance was developed using silk fibroins extracted from silk cocoons. The silk aerogel made of 2% silk fibroin solution showed a nanofibrillated porous structure and the highest surface area, which contributed to the high triboelectric output performance of the STENG based on it. The rough surface and highly porous structure facilitated charge generation of the aerogels. The optimized STENG achieved an open circuit voltage of 52.8 V and a short circuit current of 5.2 μA, and a maximum power density of 0.37 W/m2 was reached on a 1 Mω external resistor. The STENG possesses high stability under different operation frequencies and in long term, and it could act as a power source for small electronics. Moreover, the excellent biocompatibility of silk aerogels to human cells makes the STENG possible to be used as implantable energy harvesters. In addition, because of its high tribopositivity, silk can be used as additives to fabricate composite aerogels. With an addition of 20% silk, the power of cellulose nanofibril-based TENGs improved by 3.1 times.
UR - http://www.scopus.com/inward/record.url?scp=85088522337&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.0c01117
DO - 10.1021/acs.iecr.0c01117
M3 - Journal article
AN - SCOPUS:85088522337
SN - 0888-5885
VL - 59
SP - 12399
EP - 12408
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 27
ER -