School of Resources and Materials University 530004;
Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials 530004;
Key Laboratory of New Low-carbon Green Chemical Technology Department of Guangxi Zhuang Autonomous Region 530004;
School of Nuclear Science and Technology of South China 421000;
School of Nuclear Science and Engineering Jiao Tong University 200240;
COBALT; N263; sodium nitrite; EXTRACTION; iso-propyl alcohol; spent lithium-ion battery;