期刊
ADVANCED ENERGY MATERIALS
卷 11, 期 30, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202101294
关键词
carbon dots; dual charge transfer; interfacial polarization; polyvinyl alcohol; triboelectric nanogenerators
类别
资金
- Hong Kong Polytechnic University [G-YZ4H, G-YWA2]
This study proposed a novel approach for developing high-output TENGs by synthesizing PEI-functionalized NCDs-PEI and incorporating them into PVA to form CPP composites. By optimizing the composition of CPP composites, a significant enhancement in power density of TENGs was achieved.
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.
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