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Efficient sulfuric acid-Vitamin C leaching system: Towards enhanced extraction of cobalt from spent lithium-ion batteries

文献类型： 外文期刊

作者： Gao, Guilan 1 ; Luo, Xingmin 2 ; Lou, Xiaoyi 3 ; Guo, Yaoguang 2 ; Su, Ruijng 2 ; Guan, Jie 2 ; Li, Yingshun 5 ; Yuan, Ha 1 ;

作者机构： 1.Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China

2.Shanghai Polytech Univ, Sch Environm & Mat Engn, Res Ctr Resource Recycling Sci & Engn, Shanghai 201209, Peoples R China

3.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Minist Agr, Key Lab Control Qual & Safety Aquat Prod, Shanghai 200090, Peoples R China

4.Shanghai Pudong Shuguang Res Ctr High Environm Tr, Shanghai 201209, Peoples R China

5.Shanghai Xin Jinqiao Environm Protect Co Ltd, Shanghai 201201, Peoples R China

关键词： Spent lithium-ion batteries; Lithium cobalt oxide; Leaching; Orthogonal design

期刊名称：JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT （ 影响因子：2.863； 五年影响因子：2.9 ）

ISSN： 1438-4957

年卷期： 2019 年 21 卷 4 期

页码：

收录情况： SCI

摘要： Cobalt (Co), a rare and valuable metal, is used extensively to prepare lithium cobalt oxide (LiCoO2) employed in lithium-ion batteries (LIBs). Developing an effective method to recover Co from spent LIBs is of great economic significance. In the present study, we designed an efficient sulfuric acid-vitamin C system for the extraction of Co from spent LIBs and determined the effects of operational parameters on the extraction of Co. The results showed that there were optimum values for the concentration of sulfuric acid and leaching temperature in promoting leaching. For vitamin C, its effectiveness increased with concentration to a maximal value, but raising the concentration further was without significant effect. The leaching time hardly affected the extraction of Co. Although changes in solid-liquid ratios at low value did not greatly influence recovery, high ratios significantly decreased it. The final optimized experimental scheme was derived from a simulation using the Design-Expert 8.0.6.1 software. Optimal reaction conditions, under which 95.5% of Co was recovered, contained 3 molL(-1) sulfuric acid and 0.56 molL(-1) vitamin C with S/L ratio at 15 gL(-1) and leaching temperature of 70 degrees C. The present work describes a potentially promising technology for the recovery of cobalt from spent LIBs.

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