氨基酸基生物复合材料的结构特征和电化学行为

IF 9 1区 工程技术 Q1 ENERGY & FUELS
Andrii Hrubiak , Asfaw Beyene , Yurii Yavorskyi , Irine Gotsiride , Bogdan Ostafiychuk
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引用次数: 0

摘要

在电极组合物的形成中使用活性有机成分的方法是改进混合电化学系统的一种新的和有前途的解决方案。在这篇论文中,我们的目的是确定在机械合成过程中碳模板的类型和组分的结构顺序对氨基酸基生物复合材料的电导率和电化学性能的影响。为了实现这一目标,我们制作并测试了一系列基于热膨胀石墨(TEG)、碳纳米管(CNTs)和氨基酸(如天冬氨酸和甘氨酸)的生物复合材料。阻抗谱分析表明,所有合成的生物复合材料都表现出电子传导机制,其导电性主要来自碳模板。直接观察表明,在TEG生物复合材料的情况下,模板经历了显著的开裂和分散,导致TEG和氨基酸颗粒的混合物的形成。对于含有碳纳米管的生物复合材料,分散相对较少,氨基酸颗粒均匀地覆盖在致密的纳米管聚集体上。生物复合材料中组分的不同结构组织决定了它们在质子KOH电解质下的三电极电池中的电化学行为。含有碳纳米管的生物复合材料,由于存在表面定位的氨基酸作为电化学反应的中心,表现出假电容电荷积累。对于基于TEG的生物复合材料,组分的无序排列以及氨基酸与模板之间缺乏稳定的电导率接触导致电容电荷通过形成双电层而积累。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structural features and electrochemical behavior of amino acid-based biocomposites
The approach associated with the use of active organic components in the formation of the electrode composition is a new and promising solution for improving hybrid electrochemical systems. In this manuscript, we aim to determine the influence of the type of carbon template and the structural ordering of components during mechanosynthesison the manifestation of the electroconductivity and electrochemical properties of amino acid-based biocomposites. To achieve this, a series of biocomposites based on thermally expanded graphite (TEG) and carbon nanotubes (CNTs) and amino acids, like aspartate and glycine were fabricated and tested. Impedance spectroscopy has revealed that all the synthesized biocomposites exhibit an electronic conduction mechanism, with primary contribution to conductivity originating from the carbon templates. Direct observations have revealed that in the case of biocomposites with TEG, the template undergoes significant cracking and dispersion, leading to the formation of a mixture of TEG and amino acid particles. For biocomposites with CNTs, dispersion is comparatively less and uniform covering of compacted nanotube aggregates by amino acid particles is observed. The different structural organization of components in the biocomposites determines their electrochemical behavior in a three-electrode cell with a proton KOH electrolyte. Biocomposites with CNTs, due to the presence of surface-localized amino acids as centers of electrochemical reactions, exhibit pseudocapacitive charge accumulation. For biocomposites based on TEG, the disordered arrangement of components and the lack of stable conductivity contacts between amino acids and the template leads to capacitive charge accumulation through the formation ofthe electrical double layer.
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来源期刊
Renewable Energy
Renewable Energy 工程技术-能源与燃料
CiteScore
18.40
自引率
9.20%
发文量
1955
审稿时长
6.6 months
期刊介绍: Renewable Energy journal is dedicated to advancing knowledge and disseminating insights on various topics and technologies within renewable energy systems and components. Our mission is to support researchers, engineers, economists, manufacturers, NGOs, associations, and societies in staying updated on new developments in their respective fields and applying alternative energy solutions to current practices. As an international, multidisciplinary journal in renewable energy engineering and research, we strive to be a premier peer-reviewed platform and a trusted source of original research and reviews in the field of renewable energy. Join us in our endeavor to drive innovation and progress in sustainable energy solutions.
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