TY - JOUR
T1 - Interfacial Polarization and Dual Charge Transfer Induced High Permittivity of Carbon Dots-Based Composite as Humidity-Resistant Tribomaterial for Efficient Biomechanical Energy Harvesting
AU - Li, Zihua
AU - Xu, Bingang
AU - Han, Jing
AU - Huang, Junxian
AU - Chung, King Yan
N1 - Funding Information:
The authors would like to acknowledge the funding support from the Hong Kong Polytechnic University (Project No. G‐YZ4H and G‐YWA2) for the work reported here.
Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021/8/12
Y1 - 2021/8/12
N2 - Tribopositive, scalable, and biocompatible materials are highly desired for high-performance triboelectric nanogenerators (TENGs). In this study, polyethylenimine (PEI) functionalized N-doped carbon dots (NCDs-PEI) are synthesized and a novel approach to develop high-output TENGs by incorporating high permittivity NCDs-PEI into polyvinyl alcohol (PVA) as the tribopositive composite (CPP composite) is proposed for the first time. By systematically manipulating the mass ratio of NCDs/PVA and PEI-functionalized concentration, the optimized CPP composite-based TENGs (CPP-TENGs) reveal a remarkable enhancement in power density by 28.5 times as compared with pure PVA-based TENGs. The considerable electric outputs of CPP-TENGs can be attributed to the synergistic effect of interfacial polarization enhanced permittivity of CPP composite and boosted surface charge density induced by dual charge transfer pathways. Moreover, CPP-TENGs present superior high-output stability, durability, and humidity-resistance, and can also effectively drive electronics at different humidity and monitor human body movements. This work renders a simple, feasible, and scalable pathway to boost the electrical performance of TENGs for biomotion energy harvesting as well as providing insights for exploiting novel tribomaterials in the development of high-output TENGs.
AB - Tribopositive, scalable, and biocompatible materials are highly desired for high-performance triboelectric nanogenerators (TENGs). In this study, polyethylenimine (PEI) functionalized N-doped carbon dots (NCDs-PEI) are synthesized and a novel approach to develop high-output TENGs by incorporating high permittivity NCDs-PEI into polyvinyl alcohol (PVA) as the tribopositive composite (CPP composite) is proposed for the first time. By systematically manipulating the mass ratio of NCDs/PVA and PEI-functionalized concentration, the optimized CPP composite-based TENGs (CPP-TENGs) reveal a remarkable enhancement in power density by 28.5 times as compared with pure PVA-based TENGs. The considerable electric outputs of CPP-TENGs can be attributed to the synergistic effect of interfacial polarization enhanced permittivity of CPP composite and boosted surface charge density induced by dual charge transfer pathways. Moreover, CPP-TENGs present superior high-output stability, durability, and humidity-resistance, and can also effectively drive electronics at different humidity and monitor human body movements. This work renders a simple, feasible, and scalable pathway to boost the electrical performance of TENGs for biomotion energy harvesting as well as providing insights for exploiting novel tribomaterials in the development of high-output TENGs.
KW - carbon dots
KW - dual charge transfer
KW - interfacial polarization
KW - polyvinyl alcohol
KW - triboelectric nanogenerators
UR - http://www.scopus.com/inward/record.url?scp=85108289891&partnerID=8YFLogxK
U2 - 10.1002/aenm.202101294
DO - 10.1002/aenm.202101294
M3 - Journal article
AN - SCOPUS:85108289891
SN - 1614-6832
VL - 11
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 30
M1 - 2101294
ER -