Abstract
hanks to their excellent capacity, affordability, and eco-friendly character-istics, transition metal oxides (TMOs) hold promise as lithium-ion batteryanodes. Nevertheless, serious challenges, including low electrical conductivityand considerable volume variation during charge–discharge cycles, hinder theircommercial viability. Here, Zn-Co bimetallic metal–organic frameworks (MOFs)precursors with distinct morphologies were fabricated through a solvothermalapproach by employing three different organic ligands (2-aminoterephthalicacid, 2-methylimidazole, and terephthalic acid). After calcination, the obtainedZnCo2 O 4 nanocomposites retained the morphology and porous features of theirMOF precursors. Notably, the ZnCo 2 O 4 derived from terephthalic acid (BDC-ZCO) exhibited an ultrathin lamellar structure, which effectively shortenedion/electron transport paths, facilitated charge transport kinetics and accel-erated ionic migration, and mitigated volume variation. Benefiting from thisunique structure, the BDC-ZCO electrode maintained 695.1 mAh g−1 after 200cycles at 0.1 A g−1 , and 510.9 mAh g−1 after 300 cycles at 0.5 A g−1 , along withexcellent rate performance and cycling stability. This study demonstrates thatstructure-oriented regulation through ligand selection is an effective strategyfor optimizing the anode characteristics of MOFs-derived TMOs for advancedlithium storage.