具有多通道离子凝胶电解质和 Ti3C2Tx MXene 复合电极协同效应的高塞贝克系数热充电超级电容器

IF 13 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Energy & Environmental Materials Pub Date : 2024-05-11 DOI:10.1002/eem2.12756
Zhongming Chen, Zhijian Du, La Li, Kai Jiang, Di Chen, Guozhen Shen
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引用次数: 0

摘要

热充电超级电容器可以收集人体产生的低品位热量,并将其转化为电能,作为可穿戴电子设备的供电装置。然而,较低的塞贝克系数和热电转换效率阻碍了其进一步应用。本文设计了一种由 ZnMn2O4@Ti3C2Tx MXene 复合材料(ZMO@Ti3C2Tx MXene)电极和 UIO-66 金属有机框架掺杂多通道聚偏氟乙烯-六氟丙烯离子凝胶电解质组成的高性能热充超级电容器装置,实现了热电转换和电能存储的同时进行。该热充超级电容器装置的塞贝克系数高达 55.4 mV K-1,热电压为 243 mV,在温差为 4.4 K 时的热电转换效率高达 6.48%。此外,该装置在高温温差(3 K)和低温温差(1 K)下分别表现出优异的充放电循环稳定性。将两个可热充电的超级电容器单元串联起来,产生的 500 mV 输出电压进一步证实了器件的稳定性。将单个装置佩戴在手臂上时,可获得 208.3 mV 的热电压,这表明该装置可应用于可穿戴电子设备。
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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High Seebeck Coefficient Thermally Chargeable Supercapacitor with Synergistic Effect of Multichannel Ionogel Electrolyte and Ti3C2Tx MXene-Based Composite Electrode

Thermally chargeable supercapacitors can collect low-grade heat generated by the human body and convert it into electricity as a power supply unit for wearable electronics. However, the low Seebeck coefficient and heat-to-electricity conversion efficiency hinder further application. In this paper, we designed a high-performance thermally chargeable supercapacitor device composed of ZnMn2O4@Ti3C2Tx MXene composites (ZMO@Ti3C2Tx MXene) electrode and UIO-66 metal–organic framework doped multichannel polyvinylidene fluoridehexafluoro-propylene ionogel electrolyte, which realized the thermoelectric conversion and electrical energy storage at the same time. This thermally chargeable supercapacitor device exhibited a high Seebeck coefficient of 55.4 mV K−1, thermal voltage of 243 mV, and outstanding heat-to-electricity conversion efficiency of up to 6.48% at the temperature difference of 4.4 K. In addition, this device showed excellent charge–discharge cycling stability at high-temperature differences (3 K) and low-temperature differences (1 K), respectively. Connecting two thermally chargeable supercapacitor units in series, the generated output voltage of 500 mV further confirmed the stability of devices. When a single device was worn on the arm, a thermal voltage of 208.3 mV was obtained indicating the possibility of application in wearable electronics.

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来源期刊
Energy & Environmental Materials
Energy & Environmental Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
17.60
自引率
6.00%
发文量
66
期刊介绍: Energy & Environmental Materials (EEM) is an international journal published by Zhengzhou University in collaboration with John Wiley & Sons, Inc. The journal aims to publish high quality research related to materials for energy harvesting, conversion, storage, and transport, as well as for creating a cleaner environment. EEM welcomes research work of significant general interest that has a high impact on society-relevant technological advances. The scope of the journal is intentionally broad, recognizing the complexity of issues and challenges related to energy and environmental materials. Therefore, interdisciplinary work across basic science and engineering disciplines is particularly encouraged. The areas covered by the journal include, but are not limited to, materials and composites for photovoltaics and photoelectrochemistry, bioprocessing, batteries, fuel cells, supercapacitors, clean air, and devices with multifunctionality. The readership of the journal includes chemical, physical, biological, materials, and environmental scientists and engineers from academia, industry, and policy-making.
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