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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.

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