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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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S&M2953 Research Paper of Special Issue

Recovery of Cobalt Metal from Waste Lithium Batteries as Sensor Materials

Jian-Zhi Wang, Yi-Chin Tang, and Yun-Hwei Shen

(Received November 25, 2021; Accepted February 17, 2022)

Keywords: waste lithium-ion batteries, Taguchi methods, recovery, hydrometallurgy, electrochemical sensors

In this study, tartaric acid was used to extract the valuable metals lithium, cobalt, nickel, and manganese from the anodes of waste lithium batteries. The effects of various factors, namely, acid concentration, reducing agent addition, temperature, solid-to-liquid ratio, and time, on the leaching efficiency were explored in order to determine the best conditions for metal recovery. First, the Taguchi methods were used to obtain the initial parameters and the factor weights affecting leaching efficiency. Finally, the optimal leaching parameters were obtained through confirmation experiments. For optimal leaching rates, the acid concentration is 2 mol L−1, time is 30 min, solid-to-liquid ratio is 10 g L−1, temperature is 90 ℃, and hydrogen peroxide addition amount is 1.0 vol%, resulting in leaching efficiencies of Li, Co, Ni, and Mn of 87.29, 80.51, 95.78, and 99.99%, respectively. The valuable metal cobalt can be used as a sensor material.

Corresponding author: Jian-Zhi Wang




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