Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.296
Publication date: 16th December 2024
Nowadays, lithium-ion batteries (LIBs) remain the most widely used and manufactured energy storage technology due to their high energy density, long cycle life, and versatility across various applications, including consumer electronics, electric vehicles, and renewable energy systems. However, LIBs face challenges due to limited lithium reserves, toxic cathode materials like cobalt, and unethical mining practices in developing countries, causing environmental and social concerns. Sodium-ion batteries (SIBs) are considered highly promising to replace lithium in storing electrochemical energy from renewable sources and enabling long-range electric vehicles, as sodium is more abundant and widely available. Indeed, sodium-ion batteries face challenges due to the limited availability of suitable cathode materials capable of efficiently hosting sodium ions. Among the promising candidates, covalent organic frameworks (COFs), a class of crystalline porous organic polymers, stand out for their tunable structure, high surface area, and potential to enable reversible sodium-ion storage through redox-active sites.[1] COFs are suitable as electrodes for SIBs due to their insolubility in electrolyte, the possibility to introduce numerous redox-active sites and tunable porosity to facilitate ion diffusion.[2],[3] Herein, we will present the electrochemical performance of an anthraquinone-based COF cathode material in sodium batteries, encompassing cyclic voltammetry, long cycling stability, and analysis of the sodium-ion diffusion mechanism within the material.
Keywords: Sodium-ion batteries, covalent organic framework, organic batteries, electroactive porous materials.
Acknowledgments
This work has received funding from the European Research Council (ERC) under the European Union’s Horizon Europe Framework Programme (ERC-2021-Starting Grant, grant agreement no. 101039748-ELECTROCOFS). This study was also funded by the PRR─Plano de Recuperação e Resiliência and by the NextGenerationEU funds at the University of Aveiro through the scope of the Agenda for Business Innovation “New Generation Storage” (project no. 58 with the application C644936001–00000045).
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