Mechanism of Lithium and Cobalt Recovery from Spent Lithium-ion Batteries by Sulfation Roasting Process
Mechanism of Lithium and Cobalt Recovery from Spent Lithium-ion Batteries by Sulfation Roasting Process
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硫酸化焙烧工艺从废旧锂离子电池中回收锂和钴的机理
DOI：
10.1007/s40242-019-0010-9
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发表时间：
2019-12
影响因子：
3.1
通讯作者：
Yang Lixin
中科院分区：
文献类型：
--
作者：
Yu Yueshan;Wang Dahui;Chen Huaijing;Zhang Xiaodong;Xu Li;Yang Lixin
Different from the traditional pyrometallurgical recovery process of Li and Co from spent lithium-ion batteries, a new recovery method for Li and Co was established by converting LiCoO_2 into water-soluble metal sul-fates by roasting a mixture of LiCoO_2 and NaHSO_4·H_2O. The evolution law of the mixture with increased roasting temperature was investigated by thermogravimetry-differential scanning calorimetry(TG-DSC), in situ X-ray diffraction(XRD), XRD, and X-ray photoelectron spectroscopy(XPS). The results show that the phase transition of LiCoO_2 mixed with NaHSO_4·H_2O with increased temperature proceeded as follows: LiCoO_2, NaHSO_4·H_2O→LiCoO_2, NaHSO_4→Li_(1-x)CoO_2, LiNaSO_4, Na_2S_2O_7, Na_2SO_4→Li_(1-x)CoO_2, Co_3O_4, LiNaSO_4, Na_2SO_4→Co_3O_4, LiNaSO_4. The reaction mechanism of this roasting process may be as follows: LiCoO_2+NaHSO_4·H_2O→1/2Li_2SO_4+ 1/2Na_2SO_4+1/3Co_3O_4+1/12O_2+3/2H_2O, Li_2SO_4+Na_2SO_4=2LiNaSO_4.
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