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Meeting MS&T25: Materials Science & Technology
Symposium Energy Materials for Sustainable Development
Presentation Title Design, Physicochemical Characterization, and Electrochemical Evaluation of Choline Chloride- and Betaine-Based Deep Eutectic Solvents for energy storage applications
Author(s) Maria Priscila Quiñonez-Angulo, José M. Diaz-Arriaga, Evelyn Johana Olivares Rodríguez, Mara Beltrán-Gastélum, Sergio Pérez-Sicairos, Davita L. Watkins , Moisés Israel Salazar-Gastelum
On-Site Speaker (Planned) Maria Priscila Quiñonez-Angulo
Abstract Scope Electrochemical energy storage and conversion systems, such as supercapacitors, offer a promising solution to mitigate the intermittency of renewable energy sources. A key challenge is developing high-performance, low-cost, and environmentally friendly electrolytes. Deep eutectic solvents (DES) are green alternatives to traditional ionic liquids, formed by mixing a hydrogen bond acceptor (HBA) with a donor (HBD), typically through simple heating without complex synthesis steps. Compared to imidazolium-based ionic liquids, DES offer lower toxicity, ease of preparation, and cost-effective scalability. In this work, we explore DES formulations using choline chloride (ChCl) and betaine (BET) as HBAs, combined with various carbohydrates, carboxylic acids, and amides as HBDs. The resulting DES will be evaluated for their physicochemical and electrochemical properties, with a focus on energy storage capacity. Additionally, selected systems will be processed into solid-state electrolytes and tested under variable temperature conditions to assess their suitability for practical energy storage applications.

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