通过具有成本效益、易于放大的 MnO2 基柔性膜同时进行太阳能驱动蒸汽和发电,Energy & Environmental Materials

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通过具有成本效益、易于放大的 MnO2 基柔性膜同时进行太阳能驱动蒸汽和发电
Energy & Environmental Materials ( IF 13.0 ) Pub Date : 2022-03-09 , DOI: 10.1002/eem2.12376
Jiaxin Ren ₁ , Yang Ding ₁ , Jiang Gong ₁ , Jinping Qu _{1,

2} , Ran Niu ₁

Affiliation

以有效的方式收集太阳能用于蒸汽和发电是同时应对能源和水危机的一项很有前途的技术。然而，构建用于蒸汽和电力热电联产的高效且易于放大的光热材料仍然具有挑战性。在此，我们报告了一种简便且具有成本效益的策略来制备 MnO ₂装饰棉布 (MC x )。原位形成的MnO ₂纳米粒子具有宽广的吸附光谱和优异的光热转化能力，使MC x成为先进的光热材料。因此，与 MC x集成的混合设备作为光热层和用于电能转换的热电（TE）模块，在1 kW m ^{-2辐照下表现出2.24 kg m}^-2 h ^-1的极高蒸发率，跻身于最强大的太阳能蒸发器之列。更重要的是，在太阳能蒸发过程中，该混合装置在 3 Sun 照射下产生 0.3 V 的开路电压和 1.6 W m ^-2的功率输出，优于大多数先前报道的太阳能驱动发电装置。因此，具有协同太阳能热利用的集成设备为偏远和资源受限地区的同时太阳能蒸汽和发电开辟了一条绿色途径。

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Simultaneous Solar-driven Steam and Electricity Generation by Cost-effective, Easy Scale-up MnO2-based Flexible Membranes

Harvesting solar energy in an effective manner for steam and electricity generation is a promising technique to simultaneously cope with the energy and water crises. However, the construction of efficient and easy scale-up photothermal materials for steam and electricity cogeneration remains challenging. Herein, we report a facile and cost-effective strategy to prepare MnO₂-decorated cotton cloth (MCx). The wide adsorption spectrum and excellent photothermal conversion ability of the in situ-formed MnO₂ nanoparticles make the MCx to be advanced photothermal materials. Consequently, the hybrid device integrated with MCx as the photothermal layer and the thermoelectric (TE) module for electricity power conversion exhibits an extremely high evaporation rate of 2.24 kg m⁻² h⁻¹ under 1 kW m⁻² irradiation, which is ranked among the most powerful solar evaporators. More importantly, during solar evaporation, the hybrid device produces an open-circuit voltage of 0.3 V and a power output of 1.6 W m⁻² under 3 Sun irradiation, and outperforms most of the previously reported solar-driven electricity generation devices. Therefore, the integrated device with synergistic solar-thermal utilization opens up a green way toward simultaneous solar vapor and electric power generation in remote and resource-constrained areas.

更新日期：2022-03-09

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