期刊
NANO ENERGY
卷 100, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2022.107495
关键词
Triboelectric nanogenerator; Hydrovoltaic device; Silicon nanowires; Integrated device; Water energy
类别
资金
- National Natural Science Foundation of China [61974098]
- China Postdoctoral Science Foundation [2020M681703, 2020TQ0220]
- 111 Program and Collaborative Innovation Center of Suzhou Nano Science and Technology
- Collaborative Innovation Center of Suzhou Nano Science and Technology [AM2021014]
- Collaborative Innovation Center of Suzhou Nano Science & Technology, Jiangsu Postdoctoral Research Funding Program [2021K319C]
- Science and Technology Development Fund, Macau SAR [AM2021014]
- Macau Young Scholars Program [2021K319C]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Collaborative Innovation Center of Suzhou Nano Science Technology
- Jiangsu Postdoctoral Research Funding Program [0044/2021/A]
This research proposes an integrated device that can collect energy from both impinging water droplets and evaporation to generate electricity. The device utilizes a Triboelectric nanogenerator (TENG) to convert water droplets into electrical power and a hydrovoltaic device (HD) to harvest energy from water evaporation. By using microstructures and specific materials, the energy output is greatly increased, providing an alternative way to efficiently harness water energy.
Extensive efforts have been made to collect energy from water to generate electricity. However, producing a high density of electrical power for small mobile electronics is challenging. Triboelectric nanogenerator (TENG), which can convert droplet water into electricity, provides sustainable electrical power for small electronics. In addition, hydrovoltaic device (HD) can harvest energy from water evaporation into electricity for small electronics. Herein, an integrated device aimed at collecting energy from both impinging water droplets and evaporation is proposed by combining a TENG with an HD. An architecture that comprises a fluorinated ethylene propylene (FEP) film as a triboelectric layer with an aluminum electrode is used to collect energy from impinging water droplets. A silicon-based HD with an asymmetrical structure where nanostructured silicon plus hierarchical nanofabric carbon electrode is used to harvest energy from vaporizing water droplets. Silver is used as a mutual electrode to integrate the TENG and the HD to generate electricity by fully using falling water droplet energy. The microstructure is built on the FEP film surface to enlarge the contact area between the droplets and FEP, greatly boosting the output of the TENG with an open-circuit voltage of 200 V and a short circuit current of 60 mu A in pulsed mode, respectively. Meanwhile, the HD device yields a consistent open-circuit voltage of 550 mV and a short circuit current density of 30 mu A/cm2. This integrated device provides a smart strategy to generate electricity by fully collecting energy from impinging water droplets and evaporation, paving an alternative way to efficiently harvest water energy.
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