AI Article Synopsis
- Three types of metal-organic frameworks (DS-MOFs) with disulfide ligands and two nonporous coordination polymers (DS-CPs) were tested as cathodes in lithium batteries, showcasing varying structural dimensions.
- Only the porous DS-MOFs exhibited near-theoretical battery capacities due to effective electrolyte ion insertion, with their 3D structures outperforming 1D and 2D variants in cycling performance.
- The use of disulfide ligands facilitated dual redox reactions, enhancing capacity and stability, suggesting that integrating S-S bonds in MOFs can guide the development of advanced lithium-sulfur batteries.
Article Abstract
Three porous disulfide-ligand-containing metal-organic frameworks (DS-MOFs) and two nonporous coordination polymers with disulfide ligands (DS-CPs) with various structural dimensionalities were used as cathode active materials in lithium batteries. Charge/discharge performance examinations revealed that only porous DS-MOF-based batteries exhibited significant capacities close to the theoretical values, which was ascribed to the insertion of electrolyte ions into the DS-MOFs. The insolubility of porous 3 D DS-MOFs in the electrolyte resulted in cycling performances superior to that of their 1 D and 2 D porous counterparts. Battery reactions were probed by instrumental analyses. The dual redox reactions of metal ions and disulfide ligands in the MOFs resulted in higher capacities, and the presence of reversible electrochemically dynamic S-S bonds stabilized the cycling performance. Thus, the strategy of S-S moiety trapping in MOFs and the obtained correlation between the structural features and battery performance could contribute to the design of high-performance MOF-based batteries and the practical realization of Li-S batteries.
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| http://dx.doi.org/10.1002/cssc.201903471 | DOI Listing |
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