Lithium recycling and cathode material regeneration from acid leach liquor of spent lithium-ion battery via facile co-extraction and co-precipitation processes.
A novel process for extracting transition metals, recovering lithium and regenerating cathode materials based on facile co-extraction and co-precipitation processes has been developed. 100% manganese, 99% cobalt and 85% nickel are co-extracted and separated from lithium by D2EHPA in kerosene. Then, Li is recovered from the raffinate as Li2CO3with the purity of 99.2% by precipitation method. Finally, organic load phase is stripped with 0.5M H2SO4, and the cathode material LiNi1/3Co1/3Mn1/3O2is directly regenerated from stripping liquor without separating metal individually by co-precipitation method. The regenerative cathode material LiNi1/3Co1/3Mn1/3O2is miro spherical morphology without any impurities, which can meet with LiNi1/3Co1/3Mn1/3O2production standard of China and exhibits good electrochemical performance. Moreover, a waste battery management model is introduced to guarantee the material supply for spent battery recycling.
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
Yue
Y
Yang
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China; Beijing Key Lab of Radioactive Wastes Treatment, Tsinghua University, Beijing 100084, China. Electronic address: smxu@tsinghua.edu.cn.
Shengming
S
Xu
College of Science, Technology and Engineering, James Cook University, Douglas, Queensland 4811, Australia.
Yinghe
Y
He
D002681:China; D011211:Electric Power Supplies; D004566:Electrodes; D008094:Lithium; D059027:Recycling; D012038:Regeneration
D008094:Lithium
Co-extraction; Regeneration; Spent lithium-ion battery; Valuable metals