Applications of Gels in Energy Materials and Devices

A special issue of Gels (ISSN 2310-2861). This special issue belongs to the section "Gel Analysis and Characterization".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 792

Special Issue Editor


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Guest Editor
Department of Energy and Materials Engineering, Dongguk University, Seoul 04620, Republic of Korea
Interests: lithium and sodium-ion batteries, lithium-air batteries, energy storage materials synthesis, and advanced characterization; electrocatalyst; electrochemistry; nanomaterials; X-ray absorption spectroscopy (XAS); ultra-small-angle X-ray scattering; X-ray nano imaging
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Special Issue Information

Dear Colleagues,

Gels are solid three-dimensional networks that entrap a liquid medium through surface tension. Different types of gels range from soft to weak to hard and robust. Some gels form when two or more substances are mixed with heating, while others form when a liquid is cooled down to a certain temperature. Their unique properties, such as their ability to hold large quantities of liquid in a concentrated form and their stability and inertness, lead to their use in various products, from food to cosmetics. However, Gels are prevalent in pharmaceuticals, environmental and bio-related fields and are highly desirable in materials and devices that generate, convert, and store energy.

Energy is the lifeblood of industry and drives the wheels of progress in modern society. Energy is also essential for our daily lives, powering our homes and businesses and providing essential services such as transportation, communications, and health care. Without access to energy, we would be unable to live as we do today. There has been a global surge in interest in energy conversion and storage. This is driven by the need to reduce carbon emissions and the demand for renewable energy sources. Companies invest heavily in researching and developing new technologies such as batteries, fuel cells, and renewable energy sources. Notably, Gels can also exhibit considerable properties at the electronic, optoelectronic, and electrochemical levels. Gels can provide a high surface area while being flexible and lightweight. Gels can also store and release energy when exposed to heat and pressure. These properties make them suitable for various applications, such as energy storage, sensors, optoelectronic devices, and fuel cells. Since the number of publications for these lines of research is rising, I believe this is an ideal opportunity to announce a Special Issue more focused on these new applications (electronics, energy capturing, energy storage, and harvesting) for gels.

As the title suggests, this Special Issue focuses on the synthesis and characterization of diverse gel-based materials for use as energy-producing devices (solar or fuel cells), energy reconversion systems (hydrogen peroxide production, CO2 capture, etc.), and energy storage devices (supercapacitors, batteries). I hope the Special Issue will unite researchers from diverse backgrounds to exchange knowledge, ideas, and views on the latest advancements in gel-based materials for energy applications.

In this Special Issue, theoretical and experimental contributions in the form of literature reviews, full-length original research articles, and short communications are welcome.

Dr. Mobinul Islam
Guest Editor

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Keywords

  • polymer gel
  • gel precursor
  • hydrogels
  • gel membrane
  • solar cell
  • batteries
  • sol–gel method
  • energy devices
  • energy conversion
  • energy harvesting
  • supercapacitor
  • flexible batteries
  • H2O2 production

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Published Papers (2 papers)

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Review

30 pages, 5265 KiB  
Review
Conducting Polymer-Based Gel Materials: Synthesis, Morphology, Thermal Properties, and Applications in Supercapacitors
by Mohammad Mizanur Rahman Khan and Nilave Chakraborty
Gels 2024, 10(9), 553; https://doi.org/10.3390/gels10090553 - 26 Aug 2024
Viewed by 378
Abstract
Despite the numerous ongoing research studies in the area of conducting polymer-based electrode materials for supercapacitors, the implementation has been inadequate for commercialization. Further understanding is required for the design and synthesis of suitable materials like conducting polymer-based gels as electrode materials for [...] Read more.
Despite the numerous ongoing research studies in the area of conducting polymer-based electrode materials for supercapacitors, the implementation has been inadequate for commercialization. Further understanding is required for the design and synthesis of suitable materials like conducting polymer-based gels as electrode materials for supercapacitor applications. Among the polymers, conductive polymer gels (CPGs) have generated great curiosity for their use as supercapacitors, owing to their attractive qualities like integrated 3D porous nanostructures, softness features, very good conductivity, greater pseudo capacitance, and environmental friendliness. In this review, we describe the current progress on the synthesis of CPGs for supercapacitor applications along with their morphological behaviors and thermal properties. We clearly explain the synthesis approaches and related phenomena, including electrochemical approaches for supercapacitors, especially their potential applications as supercapacitors based on these materials. Focus is also given to the recent advances of CPG-based electrodes for supercapacitors, and the electrochemical performances of CP-based promising composites with CNT, graphene oxides, and metal oxides is discussed. This review may provide an extensive reference for forthcoming insights into CPG-based supercapacitors for large-scale applications. Full article
(This article belongs to the Special Issue Applications of Gels in Energy Materials and Devices)
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32 pages, 6972 KiB  
Review
Gels/Hydrogels in Different Devices/Instruments—A Review
by Md Murshed Bhuyan and Jae-Ho Jeong
Gels 2024, 10(9), 548; https://doi.org/10.3390/gels10090548 - 23 Aug 2024
Viewed by 281
Abstract
Owing to their physical and chemical properties and stimuli-responsive nature, gels and hydrogels play vital roles in diverse application fields. The three-dimensional polymeric network structure of hydrogels is considered an alternative to many materials, such as conductors, ordinary films, constituent components of machines [...] Read more.
Owing to their physical and chemical properties and stimuli-responsive nature, gels and hydrogels play vital roles in diverse application fields. The three-dimensional polymeric network structure of hydrogels is considered an alternative to many materials, such as conductors, ordinary films, constituent components of machines and robots, etc. The most recent applications of gels are in different devices like sensors, actuators, flexible screens, touch panels, flexible storage, solar cells, batteries, and electronic skin. This review article addresses the devices where gels are used, the progress of research, the working mechanisms of hydrogels in those devices, and future prospects. Preparation methods are also important for obtaining a suitable hydrogel. This review discusses different methods of hydrogel preparation from the respective raw materials. Moreover, the mechanism by which gels act as a part of electronic devices is described. Full article
(This article belongs to the Special Issue Applications of Gels in Energy Materials and Devices)
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