▎ 摘　　要

In this study, we have introduced a simple method for developing the lithium cobalt iron oxide (Li0.3CoFe2O4, LCFO) nanoparticles by sol-gel and solid-state sintering methods using lithium nitrate, cobalt nitrate hexahydrate, and iron oxide as precursors. The electrochemical performance of LCFO was further improved by combining graphene (LCFO-Gr). The synthesized LCFO-Gr nanocomposite exhibited cubic face-centered structure with an average particle-size distribution of 26 nm as estimated from XRD, FESEM, and TEM studies. A novel electrochemical sensor was fabricated by placing LCFO-Gr nanocomposite on the surface of glassy carbon electrode by drop-casting method, which demonstrated superior electrocatalytic activity, sensitivity, and selectivity towards the determination of dopamine. Additionally, as a cathode material, it delivered high discharge capacity of 153 mAh g(-1) with good cycling stability, suggesting LCFO-Gr nanocomposite as a prominent material for the next-generation lithium-ion batteries. [GRAPHICS]