文献类型：期刊文献

英文题名：Leaching process for recovering valuable metals from the LiNi1/3Co1/3Mn1/3O2 cathode of lithium-ion batteries

作者：He, Li-Po[1];Sun, Shu-Ying[1];Song, Xing-Fu[1];Yu, Jian-Guo[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China

年份：2017

卷号：64

起止页码：171

外文期刊名：WASTE MANAGEMENT

收录：;EI(收录号：20171203473218);WOS:【SCI-EXPANDED(收录号:WOS:000403862100019)】；

基金：This work was financially supported by the National Natural Science Foundation of China (U1407120) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Lithium-ion batteries; Recycling; LiNi1/3Co1/3Mn1/3O2; Leaching; Kinetics

摘要：In view of the importance of environmental protection and resource recovery, recycling of spent lithium ion batteries (LIBs) and electrode scraps generated during manufacturing processes is quite necessary. An environmentally sound leaching process for the recovery of Li, Ni, Co, and Mn from spent LiNi1/3Co1/3Mn1/2O2-based LIBs and cathode scraps was investigated in this study. Eh-pH diagrams were used to determine suitable leaching conditions. Operating variables affecting the leaching efficiencies for Li, Ni, Co, and Mn from LiNi1/3Co1/3Mn1/3O2, such as the H2SO4 concentration, temperature, H2O2 concentration, stirring speed, and pulp density, were investigated to determine the most efficient conditions for leaching. The leaching efficiencies for Li, Ni, Co, and Mn reached 99.7% under the optimized conditions of 1 M H2SO4, 1 vol% H2O2, 400 rpm stirring speed, 40 pulp density, and 60 min leaching time at 40 degrees C. The leaching kinetics of LiNi1/3Co1/3Mn1/2O2 were found to be significantly faster than those of LiCoO2. Based on the variation in the weight fraction of the metal in the residue, the "cubic rate law" was revised as follows: theta(1 -f)(1/3) = (1 - kt/r(0)rho), which could characterize the leaching kinetics optimally. The activation energies were determined to be 64.98, 65.16, 66.12, and 66.04 kJ/mol for Li, Ni, Co, and Mn, respectively, indicating that the leaching process was controlled by the rate of surface chemical reactions. Finally, a simple process was proposed for the recovery of valuable metals from spent LiNi1/3Co1/3Mn1/2O2-based LIBs and cathode scraps. (C) 2017 Elsevier Ltd. All rights reserved.