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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Mussel-inspired surface functionalization of porous carbon nanosheets using polydopamine and Fe3+/tannic acid layers for high-performance electrochemical capacitors
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Mussel-inspired surface functionalization of porous carbon nanosheets using polydopamine and Fe3+/tannic acid layers for high-performance electrochemical capacitors

机译：多孔碳纳米液对高性能电化学电容器的多碳胺和Fe3 + /单宁酸层的多孔碳纳米片的贻贝式官能化

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摘要

A facilemussel-inspired surfacemodification of interconnected porous carbon nanosheet (IPCN) electrodes is demonstrated through the formation of a polydopamine coating and the subsequent layer-by-layer deposition of ferric ions (Fe3+) and tannic acid, with the aim of developing high-performance electrochemical capacitors. After the deposition of the polydopamine coating, the specific capacitance increases by similar to 40% as compared to that of an unmodified IPCN electrode. This increase in the capacitance can be explained based on the pseudocapacitance induced by the catechol groups of polydopamine. Furthermore, the electrodes coated with both polydopamine and layers of Fe3+ and tannic acid exhibit an additional increase in the capacitance to similar to 244 Fg(-1) at 5 mV s(-1), which is similar to 83% higher than that of the unmodified IPCN electrode. This is attributable to the presence of many redox moieties, which are introduced by polydopamine and tannic acid. Furthermore, the strong interactions between the Fe3+ ions and the catechol groups result in improved capacitance retention even after 1000 cycles. The musselinspired surface modification of IPCN electrodes demonstrated in this work can potentially be exploited for developing novel pseudocapacitive electrode materials with excellent performances.
机译：通过形成聚德莫胺涂层和逐层依次沉积铁离子（Fe3 +）和单宁酸的逐层沉积来证明互连多孔碳纳米片（IPCN）电极的Facilemussel鼓发的表面释放。目的是开发高性能电化学电容器。与未改性的IPCN电极的电极相比，在多碳胺涂层沉积之后，比电容相比，比40％增加。可以基于由多元多胺的儿茶酚基团诱导的假偶数来解释电容的这种增加。此外，涂有两种多斑胺和Fe3 +和鞣酸层的电极表现出在5mV S（-1）的244 fg（-1）的电容上的额外增加，其类似于比其更高的83％未修改的IPCN电极。这归因于许多氧化还原部分的存在，其由多胺和单宁酸引入。此外，甚至在1000次循环之后，Fe3 +离子和儿茶醇组之间的强相互作用也会导致电容保留改善。在该工作中所示的IPCN电极的Musselinspired表面改性可能被利用用于开发具有优异性能的新型假偶联电极材料。

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