MOF‐Derived Onion‐Like Carbon with Superior Surface Area and Porosity for High Performance Lithium‐Ion Capacitors

Lithium-ion capacitors (LICs), potentially bring together the advantages of batteries and supercapacitors. For faradaic anodes, nanostructured carbonaceous materials hold immense potential, in contrast to graphite where limitations Li-ion diffusivity exist. Herein, onion-like carbons (OLCs), synthesized from Fe-BTC metal-organic framework (MOF), is implemented as LIC anode, owing its high charge storage capacity rate capability compared graphite. The enhanced transference OLCs was understood be due hierarchical porosity with accessible inner voids along defect concentration. Therefore, full-LIC cells OLC anodes exhibited a markedly higher specific capacitance an than graphite-LIC. OLC-LIC achieved outstanding maximum energy density 224 Wh kg−1 at 122 W power 14436 80 kg−1. Thus, MOF-derived distinctive morphology presented highly attractive anode for practical systems.