Synergistic effect of Co3O4/Fe2O3 nanoparticles encapsulated with MOFs-derived nitrogen-doped porous carbon for high-performance lithium-ion battery

Using efficient and stable electrode materials for lithium-ion batteries (LIBs) is critical for cleaner and more sustainable energy systems. Choosing a reasonable composite is also critical for obtaining LIBs anode with enhanced performance and stability [1] . Herein, an effective approach for encapsulating Fe 2 O 3 and Co 3 O 4 into nitrogen-doped porous carbon (Fe 2 O 3 -Co 3 O 4 /NPC) using metal organic frameworks as sacrificial templates is reported. Due to the good conductivity of the carbon material and the synergistic effect stemming from the two components, the electrode had good electron transfer rate, was rich in accessible active sites, and had excellent reaction kinetics. Based on these properties, the electrode was used as an anode for LIBs and found to have long-term stability of 621 mA h g −1 at 1 A g −1 after 1000 cycles, and superior rate performance of 406 mA h g −1 at 2.0 A g −1 . Further, the work presents the assessment of synergistic effect of transition metal oxide anodes on the increase of LIBs performances. • Encapsulate Fe 2 O 3 into N-containing porous carbon coated Co 3 O 4 composite. • The MOFs derived carbon can provide a shorter ion diffusion path improve conductivity. • The synergy of Co 3 O 4 and Fe 2 O 3 can effectively inhibit volume expansion.