通过乙炔炭黑纳米复合材料操纵载流子浓度增强 Ag2Se 的热电特性

IF 4.4 2区 物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Dulyawich Palaporn , Ploychanok Iadrat , Tarabordin Yurata , Chuchawin Changtong , Supree Pinitsoontorn
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引用次数: 0

摘要

原始的 Ag2Se 在其塞贝克系数和电子热导率方面存在固有的局限性,因此需要通过载流子浓度控制来加以改进。虽然已利用其多孔结构来降低载流子浓度,但要达到最佳值仍具有挑战性。本研究探索用乙炔炭黑(ACB)纳米复合材料增强 Ag2Se,以进一步降低载流子浓度并改善热电(TE)特性。乙炔炭黑是一种替代其他碳材料的具有成本效益的材料,在提高各种复合材料的 TE 性能方面已显示出潜力。通过在溶液中分散不同重量的 ACB,然后进行烧结,合成了 Ag2Se 和 ACB 复合材料。利用 X 射线衍射(XRD)、透射和扫描电子显微镜(TEM 和 SEM)以及其他技术进行的表征证实了复合材料的相位、结构和形态。添加 ACB 后,Ag2Se 的电导率降低,塞贝克系数增加,尤其是当 ACB 浓度达到 5.0 wt% 时,平衡了功率因数 (PF)。总热导率降低主要是由于电子热导率降低。5.0 wt% ACB 样品在 383 K 时的 zT 值约为 0.8,与使用更昂贵的低维碳材料的复合材料性能相当。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhanced thermoelectric properties of Ag2Se by manipulation in carrier concentration via acetylene carbon black nanocomposites

Pristine Ag2Se has inherent limitations in its Seebeck coefficient and electronic thermal conductivity, necessitating improvements through carrier concentration manipulation. While its porous structure has been utilized to reduce carrier concentrations, achieving optimal values remains challenging. This study explores enhancing Ag2Se with acetylene carbon black (ACB) nanocomposites to further reduce carrier concentrations and improve thermoelectric (TE) properties. ACB, a cost-effective alternative to other carbon materials, has demonstrated potential in enhancing TE performance in various composites. Ag2Se and ACB composites were synthesized by dispersing different ACB weights in a solution, followed by sintering. Characterization using x-ray diffraction (XRD), Transmission and scanning electron microscopy (TEM and SEM), and other techniques confirmed the phase, structure, and morphology of the composites. The addition of ACB resulted in decreased electrical conductivity and increased Seebeck coefficient in Ag2Se, particularly at ACB concentrations up to 5.0 wt%, balancing the power factor (PF). The total thermal conductivity decreased due to mainly reduced electronic thermal conductivity. The 5.0 wt% ACB sample achieved a zT of approximately 0.8 at 383 K, comparable to the performance of composites using more expensive low-dimensional carbon materials.

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来源期刊
Results in Physics
Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY
CiteScore
8.70
自引率
9.40%
发文量
754
审稿时长
50 days
期刊介绍: Results in Physics is an open access journal offering authors the opportunity to publish in all fundamental and interdisciplinary areas of physics, materials science, and applied physics. Papers of a theoretical, computational, and experimental nature are all welcome. Results in Physics accepts papers that are scientifically sound, technically correct and provide valuable new knowledge to the physics community. Topics such as three-dimensional flow and magnetohydrodynamics are not within the scope of Results in Physics. Results in Physics welcomes three types of papers: 1. Full research papers 2. Microarticles: very short papers, no longer than two pages. They may consist of a single, but well-described piece of information, such as: - Data and/or a plot plus a description - Description of a new method or instrumentation - Negative results - Concept or design study 3. Letters to the Editor: Letters discussing a recent article published in Results in Physics are welcome. These are objective, constructive, or educational critiques of papers published in Results in Physics. Accepted letters will be sent to the author of the original paper for a response. Each letter and response is published together. Letters should be received within 8 weeks of the article''s publication. They should not exceed 750 words of text and 10 references.
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