Abstract
An advanced solid-state kinetic analysis was used to investigate the thermal decomposition kinetic modeling of the cobalt hydroxide nanoplates synthesized from spent lithium-ion batteries (LIBs). The as-synthesized and calcined products were characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermal analysis (DSC-DTA-TGA), and scanning electronic microscopy (SEM). Kinetic analysis showed that complex decomposition of β-Co(OH)2 in air occurred through two consecutive reactions in the 120–260°C temperature interval. The reaction mechanism of the whole process can be kinetically characterized by two successive reactions: a phase boundary contracting reaction followed by a Prout-Tompkins autocatalytic equation. Mechanistic information obtained by the kinetic study was found in good agreement with FT-IR and SEM results.
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