Tuning Infrared Emissivity of Multilayer Graphene using Ionic Liquid Gel Electrolytes

IF 5.8 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale Pub Date : 2025-03-20 DOI:10.1039/d5nr00322a

Ying Cao, Kaiyu Yang, Haibo Ke, Lishi Fu, Xitong Yan, Jinghuan Xian, Mingyuan Lin, Rui Mu, Yufeng Zhang, Weiwei Cai, Xueao Zhang

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Abstract

Actively controlling the infrared (IR) emissivity of materials is critical for numerous applications, such as radiative cooling and thermal camouflage. Multilayer graphene (MLG) has shown significant potential as a functional material with tunable IR emissivity. However, the poor long-term stability of currently reported MLG-based IR modulators greatly limits their practical applications. Herein, ionic liquid gel electrolytes (ILGPEs) are prepared and used as doping sources to assemble MLG-based IR modulators with a sandwich-like structure. The modulator lifetime is dramatically improved, while the modulation depth and dynamic response are retained at levels comparable to those using pure ionic liquids. Microscopic structural analyses, including Raman spectroscopy and X-ray diffraction, are correlated with the ionic conductivity of the ILGPE and the IR radiation of the MLG. The results indicate that the improvement in device performance is likely due to an improved interface between the ILGPE and MLG, as well as limited ion diffusion within the ILGPE, which preserves the structural integrity of the MLG. These findings shed light on the optimization of IR modulator based on ion intercalation.

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积极控制材料的红外线（IR）发射率对于辐射冷却和热伪装等众多应用至关重要。多层石墨烯（MLG）作为一种具有可调红外发射率的功能材料，已经显示出巨大的潜力。然而，目前报道的基于多层石墨烯的红外调制器的长期稳定性较差，极大地限制了其实际应用。本文制备了离子液体凝胶电解质（ILGPEs），并将其用作掺杂源，以组装具有类似三明治结构的基于 MLG 的红外调制器。调制器的寿命显著提高，而调制深度和动态响应则保持在与使用纯离子液体相当的水平。包括拉曼光谱和 X 射线衍射在内的微观结构分析与 ILGPE 的离子电导率和 MLG 的红外辐射相关联。结果表明，器件性能的提高可能是由于 ILGPE 和 MLG 之间的界面得到了改善，以及 ILGPE 内部的离子扩散受到了限制，从而保持了 MLG 的结构完整性。这些发现为基于离子插层的红外调制器的优化提供了启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

12.10

自引率

3.00%

发文量

1628

审稿时长

1.6 months

期刊介绍： Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.