Design of Bipolar Organic Matrices for Rechargeable Redox Reactions in Non-Aqueous Electrolytes
Yanislav Danchovski, Hristo Rasheev, Delyana Marinova, Yulian Zagranyarski, Radostina Stoyanova, Alia Tadjer
Abstarct: Organic electrode materials (OEMs) combine high-energy density with cost-effectiveness and environmental compatibility which makes them currently a target of intense research. Depending on the ease of reduction and oxidation, OEMs are used either as cathodes or as anodes in metal-ion batteries but the bipolar OEMs contain both reducible and oxidizable fragments and thus can serve as symmetric electrodes.
Naphthalimide derivatives occupy a special place among OEMs due to their intriguing redox–switchable properties [1]. Recently, peri-disulfo derivatives were synthesized and tested as successful bipolar OEMs for Li-ion batteries [2]. Given that selenium is a better nucleophile than sulfur [3], peri-diselenolo analogues were designed and their implementation in electrochemical cells with LiTFSI in ionic liquid as electrolyte was analyzed both experimentally (by ex-situ XRD, SEM/EDS and EPR analyses) and computationally (by means of molecular modelling with DFT). Structural, electronic and
electrochemical characteristics were quantified to supplement and interpret the experimental findings. Comparison with the performance of previously designed coordination polymers is made.
Raferences:
[1] A. Bhardwaj, Ch. Hussain, P. Dewangan and P. Mukhopadhyay. “Naphthalene diimide–Annulated Heterocyclic Acenes: Synthesis, Electrochemical and Semiconductor Properties and their Multifaceted Applications”. Chem. Eur. Journal (2024) 30, e202400208. https://doi.org /10.1002/chem.202400208
[2] M. Mutovska et al. “Naphthalene Monoimides with Peri-Annulated Disulfide Bridge – Synthesis and Electrochemical Redox Activity”. MDPI Materials (2023) 16, 7471. https://doi.org/10.3390/ma16237471
[3] H. Reich and R. Hondal. “Why Nature Chose Selenium”. ACS Chem. Biol. (2016) 11, 821-841. https://doi.org/ 10.1021/acschembio.6b00031
The research was funded by the Bulgarian Science Fund, project CARiM/VIHREN, КП-06-ДВ-6/2019 and project КП-06-Н69/1/2023
The authors from CARiM’s Research Team are bolded.
VIHREN-CARiM 2019 