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arXiv 2501.01739cond-mat.mtrl-scicond-mat.mes-hall
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结构能否影响水伏能量产生?来自MoS$_2$金属1T'相和半导体2H相的见解

Can structure influence hydrovoltaic energy generation? Insights from the metallic 1T' and semiconducting 2H phases of MoS$_2$

Kaushik Suvigya, Saini Lalita, Siva Nemala Sankar, Andrea Capasso, Li-Hsien Yeh, Kalon Gopinadhan

AI总结:

本文通过对比MoS₂金属1T'相和半导体2H相层压膜,揭示亲水性、层间通道和结构对水伏性能的关键影响,发现1T'相凭借6埃通道实现2.0 mW m⁻²峰值功率密度,远超2H相,为二维材料水伏技术提供新见解。

摘要:

利用液态水和环境湿度进行水伏发电已吸引了大量研究投入。然而,关于实现最大功率输出所需的最优材料性质,目前仍未形成明确共识。在此,我们以层状MoS$_2$的两种不同相——金属1T'相和半导体2H相——的层压膜作为代表性体系,研究亲水性、层间通道和结构等特定特性对水伏性能的关键影响。金属1T'相通过化学剥离工艺合成并组装成层压膜,随后可通过热退火将其转化为半导体2H相。在液态水条件下,通道尺寸为6埃的1T'层压膜实现了2.0 mW m$^{-2}$的峰值功率密度,显著优于缺乏明确通道的2H相,后者产生的功率为2.4 microW m$^{-2}$。我们的理论分析表明,这些亲水材料中的能量产生主要源于动电效应和表面扩散机制。这些发现凸显了相工程MoS$_2$的关键作用,并强调了二维材料层压膜在推进水伏能源技术方面的潜力。

英文摘要:

Hydrovoltaic power generation from liquid water and ambient moisture has attracted considerable research efforts. However, there is still limited consensus on the optimal material properties required to maximize the power output. Here, we used laminates of two different phases of layered MoS$_2$ -- metallic 1T' and semiconducting 2H -- as representative systems to investigate the critical influence of specific characteristics, such as hydrophilicity, interlayer channels, and structure, on the hydrovoltaic performance. The metallic 1T' phase was synthesized via a chemical exfoliation process and assembled into laminates, which can then be converted to the semiconducting 2H phase by thermal annealing. Under liquid water conditions, the 1T' laminates, having a channel size of 6 angstroms, achieved a peak power density of 2.0 mW m$^{-2}$, significantly outperforming the 2H phase, lacking defined channels, that produced a power of 2.4 microW m$^{-2}$. Our theoretical analysis suggests that energy generation in these hydrophilic materials primarily arises from electro-kinetic and surface diffusion mechanisms. These findings highlight the crucial role of phase-engineered MoS$_2$ and underscore the potential of 2D material laminates in advancing hydrovoltaic energy technologies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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