A Study on the Electrochemical Kinetics of Electrowinning Process of Valuable Metals Recovered from Lithium-ion Batteries

S. C. Park, Yong Hwan Kim, Man-Seung Lee, S. Son
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Abstract

To investigate the rate-determining step of nickel, cobalt and copper electrowinning, experiments were conducted by varying the electrolyte temperature and agitation speed using a rotating disc electrode. Analyzing the rate-determining step by calculating the activation energy in the electrowinning process, it was found that nickel electrowinning is controlled by a mixed mechanism (partly by chemical reaction and partly by mass transport), cobalt is controlled by chemical reaction, and copper is controlled by mass transfer. Electrowinning of nickel, cobalt and copper was performed by varying the electrolyte temperature and agitation speed, and the comparison of the current efficiencies was used the determine the rate-determining step.
锂离子电池回收有价金属电积过程的电化学动力学研究
为了研究电积镍、钴和铜的速率决定步骤,在旋转圆盘电极上进行了改变电解液温度和搅拌速度的实验。通过计算电积过程的活化能,分析电积过程的速率决定步骤,发现镍电积过程受混合机制控制(部分受化学反应控制,部分受传质控制),钴电积过程受化学反应控制,铜电积过程受传质控制。通过改变电解液温度和搅拌速度对镍、钴和铜进行电积,并通过比较电流效率来确定速率决定步骤。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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