Recent Advances in Conductor Materials for Energy Storage and Electrocaloric Applications

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Materials Processes".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 568

Special Issue Editor


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Guest Editor
Departamento de Química, Universidad Nacional del Sur (UNS), INQUISUR-CONICET, Av. Alem 1253, Bahía Blanca C.P. 8000, Argentina
Interests: ceramics and glasses; material characterization; experimental physics; materials processing; impedance spectroscopy; molecular dynamics simulation; solid state batteries

Special Issue Information

Dear Colleagues,

Solid ionic conductors are critical for the development of green energy storage technologies, such as solid-state batteries, fuel cells, and supercapacitors. These materials enable the efficient transport of ions within energy storage devices, which is essential for maintaining high energy density, fast charging times, and long cycle life.

In the context of solid-state batteries, solid ionic conductors replace traditional liquid electrolytes, offering several advantages. They are safer, reducing the risk of leakage, flammability, and thermal runaway. They also allow for the use of metal anodes, which significantly increases the energy density.

Moreover, solid ionic conductors are essential for improving the efficiency and sustainability of energy storage systems. They enable the development of batteries with longer lifespans and reduced environmental impact, which is crucial for integrating renewable energy sources like solar and wind into the grid. By advancing the performance and reliability of these materials, we can accelerate the transition to cleaner energy solutions, contributing to global efforts to reduce the overall environmental footprint.

Manufacturing ceramic and glassy ionic conductors for energy storage applications presents several challenges: achieving high purity and uniformity, impurities and/or defects significantly affect the overall performance; a proper densification during sintering is crucial to reduce grain boundary resistance; the sintering process must avoid cracks and structural defects; controlling the microstructure is essential to ensure mechanical stability; designing materials to achieve good interfacial contact with the electrodes to reduce mismatches in thermal expansion coefficients and chemical reactivity to minimize degradation; scalability and cost are a significant challenge; and last but not least, ensuring long-term stability under operating conditions is a major concern.

This Special Issue on “Recent Advances in Conductor Materials for Energy Storage and Electrocaloric Applications” is dedicated to exploring recent advancements in material development and application, with a focus on addressing the primary challenges related to ceramic and glassy materials, aiming to pave the way for the next generation of green energy storage devices.

Prof. Dr. Marisa A. Frechero
Guest Editor

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Keywords

  • green energy storage
  • ceramic and glassy ionic conductors
  • impedance/dielectric spectroscopy
  • ceramic and glassy structural characterization
  • electrode/electrolyte interfaces
  • grain boundary
  • solid state bateries
  • supercapacitors
  • traditional and cold sintering

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Published Papers (1 paper)

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Research

19 pages, 4506 KiB  
Article
A Novel Triethylammonium Tetrafluoroborate Electrolyte for Enhanced Supercapacitor Performance over a Wide Temperature Range
by Ezgi Yurttas, Yavuz Gokce, Nazife Isik Semerci, Emine Yagmur and Zeki Aktas
Processes 2025, 13(4), 1057; https://doi.org/10.3390/pr13041057 - 2 Apr 2025
Viewed by 358
Abstract
The wide operating temperature and voltage window are favourable properties that increase the practical applications of supercapacitors. Ionic liquids (IL) are suitable electrolytes that allow supercapacitors to be used in wide operating ranges. In this study, triethylammonium tetrafluoroborate (Et3NHBF4) [...] Read more.
The wide operating temperature and voltage window are favourable properties that increase the practical applications of supercapacitors. Ionic liquids (IL) are suitable electrolytes that allow supercapacitors to be used in wide operating ranges. In this study, triethylammonium tetrafluoroborate (Et3NHBF4) is tested as a new IL to operate supercapacitors in a wide temperature range (−40 °C, 25 °C, and 80 °C) in the presence of commercial activated carbon. The performance of Et3NHBF4 is compared to two different commercial ILs. This study also investigates the application of heat treatment to determine suitable activated carbon surface characteristics for ILs. The results indicate that heat treatment enhances the electrode–electrolyte interaction, and the electrochemical performances of the supercapacitors prepared from the heat-treated activated carbon are significantly higher than the original commercial activated carbon. Electrochemical tests show that the synthesised Et3NHBF4 (with propylene carbonate) can be used over a wide temperature range and has a better energy storage performance, especially at −40 °C (specific capacitance of 42.12 F/g at 2 A/g), compared to the other two commercial ionic liquids. Full article
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