基于Cu3Se2和废铅笔芯复合材料的高性能环保柔性热电发电机

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-05-05 DOI:10.1016/j.coco.2025.102444

M. Lakshmikanth , Ramakrishna Nayak , Prakasha Shetty , Mohammad Saquib , M. Selvakumar , Shilpa Shetty , Sandeep S , Ashwatha Narayana Prabhu , Vinod Kamath , Ashok Rao , Sandeep Nayak

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引用次数: 0

摘要

废铅笔芯用于柔性热电应用的新特性，以及提高柔性热电发电机用于低温应用的热电功率密度的需要，推动了这项工作。本文采用生物可降解的粘合剂，将广泛使用的低毒硒化铜与HB、2B和4B铅笔芯按99:1的比例配制成可丝网印刷的新型复合材料油墨。在三种铅笔芯中，2B铅笔芯复合墨水基柔性热电发电机表现出优异的热电性能。通过优化2B铅笔芯在硒化铜中的浓度（0.5-2.0 wt%），观察到1 wt%的2B铅笔芯比纯硒化铜的输出功率高1970 %。在外部负载下，在100°C温度梯度下，2B铅笔芯的最佳结构、成分和热性能使其输出功率、功率因数和功率密度分别为135.34 nW、56.39 nW/m2K2和77.25 mW/m2，优于许多已报道的新型热电发电机。这项工作展示了一种环保、可持续、低成本的方法来制造性能优异的柔性热电发电机。

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High-performance and eco-friendly flexible thermoelectric generators based on Cu3Se2 and waste pencil lead composites

The novel properties of waste pencils lead for flexible thermoelectric applications, along with the need to enhance the thermoelectric power density of flexible thermoelectric generators for low-temperature applications, have motivated this work. Here, screen printable novel inks of the composites consisting of widely available and low toxic copper selenide with HB, 2B, and 4B pencil lead in a ratio of 99:1 were formulated using a bio-degradable binder. Among three pencil leads, 2B lead composite ink-based flexible thermoelectric generators exhibited superior thermoelectric performance. On optimizing the concentration of 2B pencil lead (0.5–2.0 wt%) in copper selenide, it was observed that 1 wt% of 2B pencil lead was found to exhibit 1970 % higher power output than pure copper selenide. Under external load, the optimum structural, compositional, and thermal properties of 2B pencil lead resulted in power output, power factor, and power density of 135.34 nW, 56.39 nW/m²K², and 77.25 mW/m², respectively, at 100 °C temperature gradient, which is superior to many reported novel thermoelectric generators. This work demonstrates an eco-friendly, sustainable, low-cost approach for fabricating a flexible thermoelectric generator with excellent performance.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.