Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.369
Publication date: 16th December 2024
Improving the efficiency of the renewable energy conversion and storage devices is one of the main challenges in order to reduce the energy consumption and mitigate climate
change. Redox-active metal-organic (MOFs) and covalent organic frameworks (COFs) have emerged in recent years as auspicious electrode materials towards energy storage applications due to their high stability, porosity to facilitate ion diffusion, and huge chemical and structural versatility [1,2] Besides their inherent porosity, MOFs and COFs may also incorporate electronic functionalities, such as electrical conductivity, becoming attractive for their implementation as integral components in electronic devices [3]. Such porous materials present other advantages, including the easy modulation of physical properties by post-synthetic modifications, and the fine-tuning of their electronic properties is easily accomplished. In this sense, the design of mixed ionic-electronic conductors is highly desirable for energy storage applications. In the first part of the talk, I will present a proton-electron dual-conductive MOF based on tetrathiafulvalene(TTF)-phosphonate linkers and lanthanum ions. The formation of regular, partially oxidized TTF stacks with short S···S interactions facilitate electron transport via a hopping mechanism. Additionally, the material exhibits a proton conductivity of 4.9 x 10-5 S cm–1 at 95% relative humidity conditions due to the presence of free -POH groups, enabling efficient proton transport pathways [under review]. In the second part of the talk, I will present an approach to improve the electrochemical performance of an anthraquinone-based COF (DAAQ-TFP-COF) cathode material in metal anode (Li, Mg) based batteries [4]. Finally, the synthesis and electrochemical properties of a series of redox-active TTF-based COFs that were explored as high-voltage organic cathodes for lithium batteries will be discussed [5]
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), from the FCT/MEC (CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020, LA/P/0006/2020), FCT (PTDC/QUI-ELT/2593/2021) and from the PRR─Plano de Recuperação e Resiliência (NextGenerationEU funds) through the scope of the Agenda for Business Innovation “New Generation Storage” (project no. 58 with the application C644936001–00000045). This work has also received financial support from the Xunta de Galicia (Centro singular de investigación de Galicia accreditation 2023–2027, ED431G 2023/03) and the Oportunius program (Gain).
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