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Gels
Special Issues
Research Progress and Application Prospects of Gel Electrolytes
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Research Progress and Application Prospects of Gel Electrolytes

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

Deadline for manuscript submissions: 31 May 2024 | Viewed by 2155

Special Issue Editors

Dr. Ana Isabel Ribeiro

E-Mail Website
Guest Editor
Centro de Ciência e Tecnologia Têxtil, Universidade do Minho, 4800-058 Guimarães, Portugal
Interests: gel electrolytes; nanomaterials; functional textiles; medicinal chemistry
Special Issues, Collections and Topics in MDPI journals
Dr. Andrea Zille

E-Mail Website
Guest Editor
Centro de Ciência e Tecnologia Têxtil, Universidade do Minho, 4800-058 Guimarães, Portugal
Interests: gel electrolytes; textile coating and functionalization; medical textiles; biomaterials; nanomaterials; plasma functionalization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your work to a Special Issue of the MDPI journal Gels, entitled “Research Progress and Application Prospects of Gel Electrolytes”.

Gel electrolytes have been notable in several applications due to their unique properties. Some of these applications include batteries and energy storage systems, supercapacitors, wearable electronics, sensors, electrochromic devices, electrolytes for dye-sensitized solar cells, electrochemical capacitors, bioelectronics, medical devices, electrochemical analysis, portable electronics and so on. They can combine the advantages of liquid electrolytes and solid components in a single system. They present improved safety since they are less prone to leakage, flammability and evaporation. Moreover, they have higher mechanical stability and flexibility owing to the gel consistency, enabling the shape and integrity to be maintained, allowing more innovative and compact device designs. In addition, gel electrolytes have enhanced electrochemical performance and stability by supporting ion transport, leading to a higher energy density and lifespan without dendritic growth. Lastly, they can have superior biocompatibility and tend to be more environmentally friendly than their alternatives. Despite their advantages, gel electrolytes also pose challenges related to cost-effectiveness, long-term conductivity, and scalability. Research efforts have been directed towards addressing these challenges to make gel electrolytes more competitive with traditional electrolytes.

Thus, the main objective of this Special Issue is to highlight the research works focused on gel-based electrolytes for their different applications.

Dr. Ana Isabel Ribeiro
Dr. Andrea Zille
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Gels is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • gel electrolytes
  • safer electrolytes
  • flexible electronics
  • environmentally friendly electrolytes
  • capacitors
  • batteries
  • conductive materials

Published Papers (2 papers)

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Research

23 pages, 6923 KiB  
Article
Boosting the Sensitivity and Hysteresis of a Gel Polymer Electrolyte by Embedding SiO2 Nanoparticles and PVP for Humidity Applications
by Michelle Cedeño Mata, Albert Orpella, Manuel Dominguez-Pumar and Sandra Bermejo
Gels 2024, 10(1), 50; https://0-doi-org.brum.beds.ac.uk/10.3390/gels10010050 - 10 Jan 2024
Cited by 1 | Viewed by 933
Abstract
Enhancing sensitivity and hysteresis in capacitance humidity sensors is vital for precise, reliable, and consistent humidity control. This study explores this concern by incorporating polyvinylpyrrolidone (PVP) and SiO2 nanoparticles into a polyvinyl alcohol (PVA)-based ionic liquid gel polymer electrolyte (ILGPE), studying two [...] Read more.
Enhancing sensitivity and hysteresis in capacitance humidity sensors is vital for precise, reliable, and consistent humidity control. This study explores this concern by incorporating polyvinylpyrrolidone (PVP) and SiO2 nanoparticles into a polyvinyl alcohol (PVA)-based ionic liquid gel polymer electrolyte (ILGPE), studying two capacitor types: ILGPE and SiO2 composite ILGPE (CILGPE) capacitors. These novel electrolytes use ammonium acetate as a plasticiser, 1-butyl-3-methylimidazolium bromide as an ionic liquid, SiO2 nanoparticles as a composite, and PVA and PVP as host polymers. Capacitors were characterised and modelled using impedance spectroscopy (IS), providing an electrophysical insight into their working principle. Sensitivity and hysteresis were evaluated within a 20–90% relative humidity (RH) range at 25 °C. The SiO2 CILGPE capacitor with PVP presented superior sensitivity and hysteresis, revealing the beneficial combination of SiO2 nanoparticles and PVP. These benefits are due to the creation of pathways that facilitate water molecule diffusion and crystallinity reduction in PVA-ILGPE. In particular, at 10 kHz, it demonstrates a calibrated capacitance sensitivity of 2660 pF/%RH and a hysteresis of 3.28 %RH. This optimised capacitor outperforms some previous humidity capacitive sensors in sensitivity while exhibiting low hysteresis. Full article
(This article belongs to the Special Issue Research Progress and Application Prospects of Gel Electrolytes)
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15 pages, 4860 KiB  
Article
Bidirectional Long Short-Term Memory Model of SoH Prediction for Gelled-Electrolyte Batteries under Charging Conditions
by Ting-Jung Kuo and Wei-Ting Chao
Gels 2023, 9(12), 989; https://0-doi-org.brum.beds.ac.uk/10.3390/gels9120989 - 17 Dec 2023
Viewed by 949
Abstract
The impact of different charging currents and surrounding temperatures has always been an important aspect of battery lifetime for various electric vehicles and energy storage equipment. This paper proposes a bidirectional long short-term memory model to quantify these impacts on the aging of [...] Read more.
The impact of different charging currents and surrounding temperatures has always been an important aspect of battery lifetime for various electric vehicles and energy storage equipment. This paper proposes a bidirectional long short-term memory model to quantify these impacts on the aging of gel batteries and calculate their state of health. The training data set of the bidirectional long short-term memory model is collected by charging and discharging the gel battery for 300 cycles in a temperature-controlled box and an automated charge and discharge device under different operating conditions. The testing set is generated by a small energy storage device equipped with small solar panels. Data for 220 cycles at different temperatures and charging currents were collected during the experiment. The results show that the mean absolute error (MAE) and root-mean-square error (RMSE) between the training set and testing set are 0.0133 and 0.0251, respectively. In addition to the proposed model providing high accuracy, the gel battery proved to be stable and long-lasting, which makes the gel battery an ideal energy storage solution for renewable energy. Full article
(This article belongs to the Special Issue Research Progress and Application Prospects of Gel Electrolytes)
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