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Design, Synthesis, and Electrochemical Application of Nanomaterial
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Design, Synthesis, and Electrochemical Application of Nanomaterial

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Nanotechnology and Applied Nanosciences".

Deadline for manuscript submissions: closed (20 February 2024) | Viewed by 2700

Special Issue Editor

Dr. Yuewu Zhao

E-Mail Website
Guest Editor
CAS Key Laboratory of Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
Interests: MOF nanomaterials; photodynamic therapy of tumors; microneural electrode of the brain–computer interface
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanomaterials have attracted extensive attention due to their diverse structures, large specific surface areas, and numerous functions. MOF and carbon nitride materials have great potential in a variety of fields, such as supercapacitors, lithium-ion batteries, and catalysis. Therefore, based on the suitable characteristics of these materials, they can be used in design, synthesis, and electrochemical applications.

Dr. Yuewu Zhao
Guest Editors

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Keywords

  • nanomaterials
  • design
  • synthesis
  • electrochemical
  • application

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Published Papers (2 papers)

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Research

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14 pages, 1586 KiB  
Article
Microheater Topology for Advanced Gas Sensor Applications with Carbyne-Enriched Nanomaterials
by Mariya Aleksandrova, Belgina Ustova, Tsvetozar Tsanev, Ioannis Raptis, Angeliki Tserepi, Evangelos Gogolides and Georgi Kolev
Appl. Sci. 2024, 14(5), 1728; https://doi.org/10.3390/app14051728 - 21 Feb 2024
Cited by 1 | Viewed by 950
Abstract
The response characteristics of carbyne-enriched surface-acoustic-wave (SAW)-based gas sensors utilizing meander and rectangular microheater topologies were investigated to assess their desorption and recovery properties. Comparative analysis of contact resistance and interface capacitance before and after heating revealed minimal deviation in contact resistance, signifying [...] Read more.
The response characteristics of carbyne-enriched surface-acoustic-wave (SAW)-based gas sensors utilizing meander and rectangular microheater topologies were investigated to assess their desorption and recovery properties. Comparative analysis of contact resistance and interface capacitance before and after heating revealed minimal deviation in contact resistance, signifying strong thermal stability in the carbyne-enriched layer. However, the interface capacitance varied with the microheater size. Our analysis reveals that a small meander microheater configuration (line width: 300 µm) facilitates efficient sensor recovery at ethanol concentration measurements in the range of 180–680 ppm, maintaining a low deviation in time delay across different concentrations (~2.3%), resulting in a narrow hysteresis and linear sensor response. Conversely, the large meander microheater (line width: 450 µm) and rectangular dense microheater induce irreversible changes in the sensing structure, leading to a widened hysteresis at higher concentrations and increased power consumption. Recovery patterns display substantial deviations from initial values at different concentration levels. Higher concentrations exhibit broader hysteresis, while lower concentrations show narrower hysteresis loops, compared to the small meander microheater. The study offers insights into desorption rates, power consumption variations, and recovery behaviors related to different microheater configurations. It demonstrates the importance of microheater topology selection in tailoring recovery properties and response characteristics, contributing to the advancement of carbyne-based sensor technology. Full article
(This article belongs to the Special Issue Design, Synthesis, and Electrochemical Application of Nanomaterial)
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Review

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34 pages, 8633 KiB  
Review
Effect of MXene Nanosheet Sticking on Supercapacitor Device Performance
by Mariya Aleksandrova, Nikolay Kurtev and Ivailo Pandiev
Appl. Sci. 2024, 14(6), 2452; https://doi.org/10.3390/app14062452 - 14 Mar 2024
Viewed by 1470
Abstract
Supercapacitors have garnered significant interest in recent years due to their high power density, rapid charge/discharge rates, and long cycle life. MXenes, a family of two-dimensional (2D) transition metal carbides/nitrides, have emerged as promising electrode materials for supercapacitors. However, one major challenge associated [...] Read more.
Supercapacitors have garnered significant interest in recent years due to their high power density, rapid charge/discharge rates, and long cycle life. MXenes, a family of two-dimensional (2D) transition metal carbides/nitrides, have emerged as promising electrode materials for supercapacitors. However, one major challenge associated with incorporating MXenes in supercapacitor structures is the occurrence of sticking, wherein individual MXene flakes agglomerate, leading to reduced electrode performance. This review paper discusses various causes of sticking and approaches to preventing it, offering insights into the design and development of high-performance MXene-based supercapacitors. The morphology and size of MXene flakes, flake surface chemistry, thickness, surface area/volume ratio, electrode processing techniques (including solvent selection, additives incorporation, and deposition technology), and environmental factors were shown to be the basic factors resulting in sticking of MXene sheets. Among the strategies to mitigate this challenge, surface functionalization and passivation, integration with polymer matrices or carbon nanomaterials, and electrode processing optimization were considered. Possible paths for optimization and future directions of study, such as novel MXene compositions, understanding of interfaces and electrode–electrolyte interactions, development of advanced electrode architectures, and integration of energy storage systems, were assumed. Full article
(This article belongs to the Special Issue Design, Synthesis, and Electrochemical Application of Nanomaterial)
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