从工业废料制备的单壁碳纳米管碱激活纳米复合材料中进行热电能量收集。

Thermoelectric Energy Harvesting from Single-Walled Carbon Nanotube Alkali-Activated Nanocomposites Produced from Industrial Waste Materials.

作者信息

Davoodabadi Maliheh, Vareli Ioanna, Liebscher Marco, Tzounis Lazaros, Sgarzi Massimo, Paipetis Alkiviadis S, Yang Jian, Cuniberti Gianaurelio, Mechtcherine Viktor

机构信息

Institute of Construction Materials, Faculty of Civil Engineering, Dresden University of Technology, 01069 Dresden, Germany.

Institute for Materials Science and Max Bergmann Centre of Biomaterials, Dresden University of Technology, 01069 Dresden, Germany.

出版信息

Nanomaterials (Basel). 2021 Apr 23;11(5):1095. doi: 10.3390/nano11051095.

DOI:10.3390/nano11051095

PMID:33922586

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8145496/

Abstract

A waste-originated one-part alkali-activated nanocomposite is introduced herein as a novel thermoelectric material. For this purpose, single-walled carbon nanotubes (SWCNTs) were utilized as nanoinclusions to create an electrically conductive network within the investigated alkali-activated construction material. Thermoelectric and microstructure characteristics of SWCNT-alkali-activated nanocomposites were assessed after 28 days. Nanocomposites with 1.0 wt.% SWCNTs exhibited a multifunctional behavior, a combination of structural load-bearing, electrical conductivity, and thermoelectric response. These nanocomposites (1.0 wt.%) achieved the highest thermoelectric performance in terms of power factor (PF), compared to the lower SWCNTs' incorporations, namely 0.1 and 0.5 wt.%. The measured electrical conductivity () and Seebeck coefficient () were 1660 S·m and 15.8 µV·K, respectively, which led to a power factor of 0.414 μW·m·K. Consequently, they have been utilized as the building block of a thermoelectric generator (TEG) device, which demonstrated a maximum power output () of 0.695 µW, with a power density (PD) of 372 nW·m, upon exposure to a temperature gradient of 60 K. The presented SWCNT-alkali-activated nanocomposites could establish the pathway towards waste thermal energy harvesting and future sustainable civil engineering structures.

摘要

本文介绍了一种源自废物的单组分碱激发纳米复合材料，作为一种新型热电材料。为此，使用单壁碳纳米管（SWCNT）作为纳米夹杂物，以在研究的碱激发建筑材料中创建导电网络。在28天后评估了SWCNT-碱激发纳米复合材料的热电和微观结构特性。含有1.0 wt.% SWCNT的纳米复合材料表现出多功能行为，即结构承载、导电性和热电响应的组合。与较低SWCNT掺入量（即0.1和0.5 wt.%）相比，这些纳米复合材料（1.0 wt.%）在功率因数（PF）方面实现了最高的热电性能。测得的电导率（σ）和塞贝克系数（S）分别为1660 S·m⁻¹和15.8 μV·K⁻¹，这导致功率因数为0.414 μW·m⁻¹·K⁻²。因此，它们被用作热电发电机（TEG）装置的构建块，在暴露于60 K的温度梯度下，该装置表现出最大输出功率（Pmax）为0.695 μW，功率密度（PD）为372 nW·m⁻²。所提出的SWCNT-碱激发纳米复合材料可以为废热能量收集和未来可持续土木工程结构开辟道路。