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Mixed-Dimensional van der Waals Heterostructures for Boosting Electricity Generation
ACS Nano ( IF 15.8 ) Pub Date : 2023-09-12 , DOI: 10.1021/acsnano.3c06080
Haoran Kong 1, 2 , Huiying Yao 3 , Yuting Li 1, 2 , Qinhuan Wang 1 , Xiaopan Qiu 1 , Jin Yan 1, 2 , Jia Zhu 4 , Yu Wang 1
Affiliation  

The emerging technology of harvesting environmental energy using hydrovoltaic devices enriches the conversion forms of renewable energy. It provides more concepts for power supply in micro/nano systems, and hydrovoltaic technology with high performance, usability, and integration is essential for achieving sustainable green energy. Comparing the discovery of multiscale nanomaterials, working layers with innovative microstructures have gradually become the dominant trend in the construction of graphene-based hydrovoltaic devices. However, reports on promoting ion/electron redistribution at the solid–liquid interface through the substrate effect of graphene are accompanied by tedious procedures, nondiverse substrates, and monolithic regulation of enhancement mechanisms. Here, the electrophoretic deposition (EPD)-driven SiC whiskers (SiCw)-assisted graphene transfer process is adopted to alleviate the complexity of the device fabrication caused by graphene transfer. The resulting output performance of the graphene/SiCw (GS) mesh films is significantly boosted. The high integrity of graphene and prominent negative surface charge near the graphene–droplet interface are derived from the overlayer and underlayer inside the graphene-based mixed-dimensional van der Waals (vdW) heterostructures, respectively. Additionally, a self-powered desalination–monitoring system is designed based on integrated hydrovoltaic devices. Electricity harvested from the ionic solutions is reused for deionization, representing an efficient strategy for energy conversion and utilization.

中文翻译:

用于促进发电的混合维范德华异质结构

利用水力发电装置收集环境能源的新兴技术丰富了可再生能源的转换形式。它为微纳米系统的供电提供了更多的概念,而高性能、可用​​性和集成性的水力发电技术对于实现可持续的绿色能源至关重要。相比多尺度纳米材料的发现,具有创新微结构的工作层已逐渐成为石墨烯基水力发电装置构建的主导趋势。然而,通过石墨烯的基质效应促进固液界面上的离子/电子重新分布的报道伴随着繁琐的程序、单一的基质和增强机制的单一调节。这里,采用电泳沉积(EPD)驱动的碳化硅晶须(SiC w)辅助石墨烯转移工艺来减轻石墨烯转移引起的器件制造的复杂性。石墨烯/SiC w (GS) 网状薄膜的输出性能显着提高。石墨烯的高度完整性和石墨烯-液滴界面附近突出的负表面电荷分别源自基于石墨烯的混合维范德华(vdW)异质结构内的上层和下层。此外,还设计了基于集成水力发电装置的自供电海水淡化监测系统。从离子溶液中收集的电力可重新用于去离子,代表了能量转换和利用的有效策略。
更新日期:2023-09-12
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