ArticleJournal of materials chemistry. A2026
Influence of arylene diimide linker aromaticity on the electrochemical performance of redox-active metal-organic framework cathodes for lithium-ion storage.
Article in Journal of materials chemistry. A, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Organic electrode materials represent an attractive alternative to inorganic cathodes because they are based on abundant elements and offer tunable electrochemical performance through molecular design. Among them, metal-organic frameworks (MOFs) incorporating redox-active organic linkers have attracted considerable attention as electrode materials for metal-ion batteries. Herein, a series of isoreticular redox-active MOFs based on pyromellitic diimide (PMDI), naphthalene diimide (NDI), and perylene diimide (PDI) linkers were investigated as cathode materials for lithium-ion storage to elucidate the influence of arylene diimide aromaticity on electrochemical performance. Among the Zn-XDI (XDI = PMDI, NDI, PDI) MOFs, Zn-PDI and Zn-NDI exhibited excellent cycling stability, retaining 98% and 87% of their initial capacities after 500 cycles at 2C, respectively, whereas Zn-PMDI showed poor capacity retention, highlighting the importance of the aromatic core in stabilizing reduced states. Post-mortem X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction and Raman studies confirmed the preservation of the framework structure of Zn-PDI and Zn-NDI after extended cycling. Density functional theory (DFT) calculations revealed that increasing the aromatic core size in the Zn-XDI series stabilizes the reduced states, lowers the LUMO energy, enhances electron affinity, and facilitates Li
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