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Suen JW, Elumalai NK, Debnath S, Mubarak NM, Lim CI, Reddy Moola M, Tan YS, Khalid M. Investigating the Correlation between Electrolyte Concentration and Electrochemical Properties of Ionogels. Molecules 2023; 28:5192. [PMID: 37446854 DOI: 10.3390/molecules28135192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 06/29/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023] Open
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.
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Affiliation(s)
- Ji Wei Suen
- Department of Mechanical Engineering, Faculty of Engineering and Science, Curtin University, Miri 98009, Malaysia
| | - Naveen Kumar Elumalai
- Energy and Resources Institute, Faculty of Science and Technology, Charles Darwin University, Darwin, NT 0909, Australia
| | - Sujan Debnath
- Department of Mechanical Engineering, Faculty of Engineering and Science, Curtin University, Miri 98009, Malaysia
| | - Nabisab Mujawar Mubarak
- Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri Begawan BE1410, Brunei
| | - Chye Ing Lim
- Department of Mechanical Engineering, Faculty of Engineering and Science, Curtin University, Miri 98009, Malaysia
| | - Mohan Reddy Moola
- Department of Mechanical Engineering, Faculty of Engineering and Science, Curtin University, Miri 98009, Malaysia
| | - Yee Seng Tan
- Research Centre for Crystalline Materials, School of Medical and Life Sciences, Sunway University, Bandar Sunway, Petaling Jaya 47500, Malaysia
| | - Mohammad Khalid
- Sunway Centre for Electrochemical Energy and Sustainable Technology (SCEEST), School of Engineering and Technology, Sunway University, Bandar Sunway, Petaling Jaya 47500, Malaysia
- Division of Research and Development, Lovely Professional University, Phagwara 144411, Punjab, India
- School of Applied and Life Sciences, Uttaranchal University, Dehradun 248007, Uttarakhand, India
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A. M. Babakir B, Abd Ali LI, Ismail HK. Rapid removal of anionic organic dye from contaminated water using a poly(3-aminobenzoic acid/graphene oxide/cobalt ferrite) nanocomposite low-cost adsorbent via adsorption techniques. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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