Electrochemical Performance of Co[sub 3]O[sub 4]–C Composite Anode Materials

Abstract

composite powder has been synthesized via spray pyrolysis of cobalt nitrate-sugar solution at and assessed for application as anode materials in Li-ion batteries. Microstructural characterization by scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy confirm an even distribution of carbon throughout particles, as well as the presence of a carbon-based surface sheath surrounding particle agglomerates. Charge-discharge cycling of half-cells indicates a stable reversible discharge capacity above . Equivalent circuit modeling of Nyquist plots show the electrode has significant kinetic advantages over non-composite transition metal oxide electrodes.