期刊
NANO ENERGY
卷 90, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2021.106619
关键词
Lipoic acid; Cellulose; Melt; Ionogel; Triboelectric nanogenerator
类别
资金
- National Natural Science Foundation of China [21774036]
- Guangdong Province Science Foundation [2017GC010429]
- Science and Technology Program of Guangzhou [202002030329]
Ionogels are promising electrode materials for stretchable Triboelectric Nanogenerators (TENG), with a novel melt-polymerization technique using hydroxypropyl cellulose (HPC) in molten α-lipoic acid (LA) liquid. This results in ionogels with high transparency, strength, stretchability, conductivity, healability, UV resistance, thermal stability, strain-sensitivity, and recyclability. The developed TENG can harvest biomechanical energies generate electrical outputs, maintaining performance even after stretching, high temperature storage, long-term operation, mechanical damage, and recycling.
Ionogels are promising electrode materials of stretchable triboelectric nanogenerators (TENG). However, the development of ionogel materials that simultaneously meet the requirements of green start feedstock, simple fabrication, multifunction, and recyclable feature remains a challenging issue. Here, we try to address this by adopting novel melt-polymerization of hydroxypropyl cellulose (HPC) in molten a-lipoic acid (LA) liquid. This strategy is extremely simple, facile, based on biomass molecules, and offers a promising methodology to completely melt processing of cellulose materials. The HPC chains successfully forms the double-network structure with LA poly(disulfides) chains by multiple hydrogen bonding interactions. As result, the integrated merits of high transparency, high strength, fine stretchability, moderate conductivity, healability, ultraviolet resistance, thermal stability, strain-sensitivity, and full recyclability are realized in the obtained ionogels. Encouraging by these features, a versatile triboelectric nanogenerator (I-TENG) (3 cm x 3 cm) is fabricated using ionogels as functional electrodes. This nanogenerator can harvest biomechanical energies and convert them into electrical outputs of 80 V, 2 mu A, 27 nC, and the max power density of 67.9 mW m(-2) at a fixed frequency of 3 Hz, respectively. Beside transparent characteristic, this nanogenerator is able to maintain good energy harvesting performance after stretching, high temperature storage, long-term operation, mechanical damage, and even recycling. Notably, the I-TENG can not only work as green power supply to drive small electronics, but also as self-powered sensors to distinguish human motions and English letters.
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