In this study, Co/Ni-MOF-74-derived CoNi2S4 nanoparticles embedded in porous carbon (CoNi2S4@C) were successfully prepared using Co/Ni-MOF-74 as precursor. And, CoNi2S4@C exhibits excellent electrochemical performance as an anode material for sodium ion batteries.
Spinifex grass derived hard carbon is used as anodes for sodium-ion batteries. Extraordinary stability and capacity retention of ∼300 mA h g−1 on prolonged cycling against sodium was observed. The eco-friendly and low-cost synthesis procedure make the biomass derived carbon material promising for energy storage applications.