Optimization and kinetics of leaching valuable metals from cathode materials of spent ternary lithium ion batteries with starch as reducing agent

被引：0

作者：

Lai Y.-Q. ^{[1
]}

Yang J. ^{[1
]}

Zhang G. ^{[2
]}

Tang Y.-W. ^{[3
]}

Jiang L.-X. ^{[1
]}

Yang S.-H. ^{[1
]}

Li J. ^{[1
]}

机构：

[1] School of Metallurgy and Environment, Central South University, Changsha

[2] Zhongtian New Material Co., Ltd., Nantong

[3] Guangdong Jiana Energy Technology Co., Ltd., Guangzhou

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2019年 / 29卷 / 01期

关键词：

Acid leaching; Cathode material; Leaching kinetics; Spent lithium ion battery; Starch; Valuable metal;

D O I：

10.19476/j.ysxb.1004.0609.2019.01.18

中图分类号：

学科分类号：

摘要：

Based on the properties that starch can be hydrolyzed into reduced monosaccharide under dilute acid or heating conditions, starch was used as a reducing agent by acid leaching method for recovering Li, Ni, Co, Mn from cathode materials of spent ternary lithium ion battery. The effects of acid concentration, starch concentration, solid to liquid ratio, leaching temperature and leaching time on the leaching rate of four valuable metals were investigated. The results show that the leaching rates of Li, Ni, Co and Mn reach 98.55%, 97.6%, 96.73% and 91.92%, respectively under the optimum conditions of 2 mol/L H2SO4, 4 g/L starch, solid-liquid ratio at 50 g/L, leaching temperature at 80 ℃ and leaching time at 120 min. In addition, a good linear correlation is shown by fitting the kinetic parameters of leaching based on the logarithmic law equation, and the apparent activation energies of Li, Ni, Co and Mn are 14.8 kJ/mol, 21.3 kJ/mol, 24 kJ/mol and 26.4 kJ/mol, respectively. The analysis results of XRD and SEM show that the main phases of the leaching residue was C and MnO2. © 2019, Science Press. All right reserved.

引用

页码：153 / 160

页数：7

共 24 条

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