利用牛皮纸木质素衍生硬碳作为电化学电容器中的创新生物电极

IF 2.4 4区 化学 Q3 CHEMISTRY, PHYSICAL
Ionics Pub Date : 2024-08-20 DOI:10.1007/s11581-024-05770-4
Beata Kurc, Marita Pigłowska, Paweł Fuć, Natalia Szymlet, Xymena Gross, Adam Piasecki
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引用次数: 0

摘要

近年来,由于人们对储能设备更加绿色、安全的需求越来越高,生物材料越来越受到人们的青睐。经过碳化处理后,木质素具有稍大的比表面和多孔结构,可提供显著的电化学双层容量。牛皮纸木质素作为粘合剂,有助于保持电极结构的完整性,与之结合后,可提高活性材料的使用效率。粘合剂有助于碳化木质素颗粒更好地分散,减少团聚,确保电解质离子有更多的活性位点。这项研究的目的是提出一种新型木质素基硬碳,作为电极材料应用于电化学电容器。为此,我们进行了详细的物理化学和电化学分析。牛皮纸木质素在 600 至 1000 °C 的温度下进行碳化。得到的材料具有热稳定性、低多分散指数(PDI)和中疏度的特点。热重(TG)分析用于确定结构的变化,而官能团则使用傅立叶变换红外光谱(FTIR)进行分析。在电化学应用中,该材料具有很高的循环稳定性,不会发生氧化还原反应,电荷积累的主要机制是基于电化学双电层。此外,低电阻也有助于改善电荷存储。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Utilizing kraft lignin–derived hard carbon as an innovative bio-electrode in electrochemical capacitors

Utilizing kraft lignin–derived hard carbon as an innovative bio-electrode in electrochemical capacitors

In recent years, biomaterials are gaining popularity due to high need to make energy storage devices greener and safer. After the carbonization process, lignin has a slightly larger specific surface and a porous structure, which can provide a significant electrochemical double-layer capacity. When combined with kraft lignin as a binder, which helps maintain the structural integrity of the electrode, the efficient use of the active material can be enhanced. The binder facilitates better dispersion of carbonized lignin particles, reducing agglomeration and ensuring greater availability of active sites for electrolyte ions. The aim of this work is to present a novel lignin-based hard carbon as an electrode material for applications in electrochemical capacitors. To this end, a detailed physicochemical and electrochemical analysis was conducted. Kraft lignin was carbonized at temperatures ranging from 600 to 1000 °C. The resulting material is characterized by thermal stability, a low polydispersion index (PDI), and mesoporosity. Thermogravimetric (TG) analysis was used to determine changes in structure, while functional groups were analyzed using Fourier-transform infrared spectroscopy (FTIR). In electrochemical applications, the material exhibits high cyclic stability and no redox reactions, with the primary mechanism of charge accumulation being based on the electrochemical double layer. Additionally, low resistances contribute to improved charge storage.

Graphical abstract

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来源期刊
Ionics
Ionics 化学-电化学
CiteScore
5.30
自引率
7.10%
发文量
427
审稿时长
2.2 months
期刊介绍: Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.
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