Enhancing Capacity and Stability of Anionic MOFs as Electrode Material by Cation Exchange.

Autor: Akintola O; Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Jena, Germany., Gerlach P; Institut für Technische Chemie und Umweltchemie, Friedrich-Schiller-Universität Jena, Jena, Germany.; Center for Energy and Environmental Chemistry Jena (CEEC Jena), Jena, Germany., Plass CT; Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Jena, Germany., Balducci A; Institut für Technische Chemie und Umweltchemie, Friedrich-Schiller-Universität Jena, Jena, Germany.; Center for Energy and Environmental Chemistry Jena (CEEC Jena), Jena, Germany., Plass W; Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Jena, Germany.
Jazyk: angličtina
Zdroj: Frontiers in chemistry [Front Chem] 2022 Mar 04; Vol. 10, pp. 836325. Date of Electronic Publication: 2022 Mar 04 (Print Publication: 2022).
DOI: 10.3389/fchem.2022.836325
Abstrakt: In this study we report on the characterization and use of the anionic metal-organic framework (MOF) JUMP-1, [(Me 2 NH 2 ) 2 [Co 3 (ntb) 2 (bdc)]] n , alongside with its alkali-metal ion-exchanged analogs JUMP-1(Li) and JUMP-1(Na), as electrode materials for lithium and sodium batteries. Composite electrodes containing these anionic-MOFs were prepared and tested in 1 M lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) in propylene carbonate (PC) and/or 1 M sodium TFSI (NaTFSI) in PC. We showed that the ion-exchanged materials JUMP-1(Li) and JUMP-1(Na) display higher capacities in comparison with the original as-prepared compound JUMP-1 (490 mA∙h∙g -1 vs. 164 mA∙h∙g -1 and 83 mA∙h∙g -1 vs. 73 mA∙h∙g -1 in Li and Na based electrolytes, respectively). Additionally, we showed that the stability of the electrodes containing the ion-exchanged materials is higher than that of JUMP-1, suggesting a form of chemical pre-alkalation works to stabilize them prior to cycling. The results of these studies indicate that the use of designed anionic-MOFs represents a promising strategy for the realization of high performance electrodes suitable for energy storage devices.
Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
(Copyright © 2022 Akintola, Gerlach, Plass, Balducci and Plass.)
Databáze: MEDLINE
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