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Fabricating van der Waals Heterostructures with Precise Rotational Alignment
Published on: July 5, 2019
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Mixed-Dimensional van der Waals Heterostructures for Boosting Electricity Generation.
Haoran Kong1,2, Huiying Yao3, Yuting Li1,2
1State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China.
ACS Nano
|September 12, 2023
Summary
This study introduces a novel graphene-based hydrovoltaic device using SiC whiskers for enhanced energy harvesting. The developed device efficiently converts environmental energy and powers a self-sufficient desalination system.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Hydrovoltaic devices offer a promising avenue for renewable energy harvesting, crucial for micro/nano power systems.
- Graphene-based hydrovoltaic devices with innovative microstructures are trending, but face challenges in fabrication and performance enhancement.
- Existing methods for improving ion/electron redistribution in graphene hydrovoltaics are complex and offer limited control.
Purpose of the Study:
- To develop a simplified fabrication process for high-performance graphene-based hydrovoltaic devices.
- To enhance the output performance of hydrovoltaic devices through novel material integration.
- To demonstrate a practical application of these devices in a self-powered desalination system.
Main Methods:
- Utilized electrophoretic deposition (EPD) for SiC whiskers (SiCw)-assisted graphene transfer.
- Fabricated graphene/SiCw (GS) mesh films with mixed-dimensional van der Waals (vdW) heterostructures.
- Designed and integrated hydrovoltaic devices into a self-powered desalination-monitoring system.
Main Results:
- Significantly boosted output performance of the graphene/SiCw hydrovoltaic devices.
- Achieved high graphene integrity and prominent negative surface charge via vdW heterostructures.
- Successfully demonstrated electricity generation from ionic solutions to power a deionization process.
Conclusions:
- The EPD-driven SiCw-assisted graphene transfer simplifies device fabrication and enhances hydrovoltaic performance.
- The developed graphene/SiCw heterostructures effectively promote ion/electron redistribution for improved energy conversion.
- Integrated hydrovoltaic devices offer an efficient strategy for sustainable energy harvesting and utilization, exemplified by the desalination system.
Keywords:
electricity generationelectrophoretic depositiongrapheneintegrated devicesmixed-dimensional van der Waals heterostructuressilicon carbide whiskersMore Related Videos
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