Ferrocene-based metal-organic framework as a promising cathode in lithium-ion battery

Here, a ferrocene-based metal–organic framework, Iron (III) 1,1′-Ferrocenedicarboxylate (Fe2(DFc)3), was successfully synthesized and employed as an efficient and stable cathode for lithium-ion battery (LIB). Benefiting from its unique structure and low solubility as well as the reversible redox shuttle of Fe2+/Fe3+, LIBs with Fe2(DFc)3 as cathodes showed a high energy density of 549 Wh kg−1 (vs. lithium anode) and superior electrochemical performance including the relatively high operation potential of 3.55 V (vs. Li+/Li), the high specific capacity of 172 mAh g−1 at 50 mA g−1, and the high average specific capacity of 70 mAh g−1 at the current density of 2000 mA g−1 for 10,000 cycles.