Journal article
Investigating the Correlation between Electrolyte Concentration and Electrochemical Properties of Ionogels
Molecules, Vol.28(13), pp.1-19
2023
PMID: 37446854
Abstract
Ionogels are hybrid materials comprising an ionic liquid confined within a polymer matrix. They have garnered significant interest due to their unique properties, such as high ionic conductivity, mechanical stability, and wide electrochemical stability. These properties make ionogels suitable for various applications, including energy storage devices, sensors, and solar cells. However, optimizing the electrochemical performance of ionogels remains a challenge, as the relationship between specific capacitance, ionic conductivity, and electrolyte solution concentration is yet to be fully understood. In this study, we investigate the impact of electrolyte solution concentration on the electrochemical properties of ionogels to identify the correlation for enhanced performance. Our findings demonstrate a clear relationship between the specific capacitance and ionic conductivity of ionogels, which depends on the availability of mobile ions. The reduced number of ions at low electrolyte solution concentrations leads to decreased ionic conductivity and specific capacitance due to the scarcity of a double layer, constraining charge storage capacity. However, at a 31 vol% electrolyte solution concentration, an ample quantity of ions becomes accessible, resulting in increased ionic conductivity and specific capacitance, reaching maximum values of 58 ± 1.48 μS/cm and 45.74 F/g, respectively. Furthermore, the synthesized ionogel demonstrates a wide electrochemical stability of 3.5 V, enabling diverse practical applications. This study provides valuable insights into determining the optimal electrolyte solution concentration for enhancing ionogel electrochemical performance for energy applications. It highlights the impact of ion pairs and aggregates on ion mobility within ionogels, subsequently affecting their resultant electrochemical properties.
Details
- Title
- Investigating the Correlation between Electrolyte Concentration and Electrochemical Properties of Ionogels
- Authors
- Ji Wei Suen - Curtin University SarawakNaveen Elumalai (Corresponding Author) - Charles Darwin UniversitySujan Debnath - Curtin University SarawakNabisab Mubarak - Universiti Teknologi BruneiChye ing Lim - Curtin University SarawakMohan Reddy Moola - Curtin UniversityYee Seng Tan - Sunway UniversityMohammad Khalid - Lovely Professional University
- Publication details
- Molecules, Vol.28(13), pp.1-19
- Publisher
- MDPI AG
- Date published
- 2023
- DOI
- 10.3390/molecules28135192
- ISSN
- 1420-3049
- PMID
- 37446854
- Copyright note
- © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
- Data Availability
- Not applicable.
- Grant note
- This research was funded by the Fundamental Research Grant Scheme (grant number FRGS/1/2020/TK0/CURTIN/03/2; Project ID: 18019) from the Ministry of Higher Education (MOHE) Malaysia.
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 991216649202621
- Output Type
- Journal article
Metrics
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Biochemistry & Molecular Biology
- Chemistry, Multidisciplinary