Akintola Oluseun, Gerlach Patrick, Plass Christian T, Balducci Andrea, Plass Winfried
Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Jena, Germany.
Institut für Technische Chemie und Umweltchemie, Friedrich-Schiller-Universität Jena, Jena, Germany.
Front Chem. 2022 Mar 4;10:836325. doi: 10.3389/fchem.2022.836325. eCollection 2022.
In this study we report on the characterization and use of the anionic metal-organic framework (MOF) JUMP-1, [(MeNH)[Co(ntb)(bdc)]] , 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 vs. 164 mA∙h∙g and 83 mA∙h∙g vs. 73 mA∙h∙g 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.
在本研究中，我们报告了阴离子金属有机框架（MOF）JUMP-1，即[(MeNH)[Co(ntb)(bdc)]]，及其碱金属离子交换类似物JUMP-1(Li)和JUMP-1(Na)作为锂和钠电池电极材料的表征和应用。制备了含有这些阴离子MOF的复合电极，并在碳酸丙烯酯（PC）中的1 M双（三氟甲基磺酰）亚胺锂（LiTFSI）和/或PC中的1 M TFSI钠（NaTFSI）中进行了测试。我们发现，与原始制备的化合物JJJUMP-1相比，离子交换材料JUMP-1(Li)和JUMP-1(Na)具有更高的容量（在基于锂和钠的电解质中，分别为490 mA∙h∙g对164 mA∙h∙g和83 mA∙h∙g对73 mA∙h∙g）。此外，我们还发现，含有离子交换材料的电极的稳定性高于JUMP-1，这表明一种化学预碱化形式在循环之前起到了稳定它们的作用。这些研究结果表明，使用设计的阴离子MOF是实现适用于储能装置的高性能电极的一种有前景的策略。
