TY - JOUR
T1 - Mechanism of Lithium and Cobalt Recovery from Spent Lithium-ion Batteries by Sulfation Roasting Process
AU - Yu, Yueshan
AU - Wang, Dahui
AU - Chen, Huaijing
AU - Zhang, Xiaodong
AU - Xu, Li
AU - Yang, Lixin
N1 - Publisher Copyright:
© 2019, Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - 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 LiCoO2 into water-soluble metal sulfates by roasting a mixture of LiCoO2 and NaHSO4·H2O. 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 LiCoO2 mixed with NaHSO4·H2O with increased temperature proceeded as follows: LiCoO2, NaHSO4H2O→LiCoO2, NaHSO4→Li1−xCoO2, LiNaSO4, Na2S2O7, Na2SO4→Li1−xCoO2, Co3O4, LiNaSO4, Na2SO4→Co3O4, LiNaSO4. The reaction mechanism of this roasting process may be as follows: LiCoO2+NaHSO4·H2O→1/2Li2SO4+ 1/2Na2SO4+1/3Co3O4+1/12O2+3/2H2O, Li2SO4+Na2SO4=2LiNaSO4.
AB - 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 LiCoO2 into water-soluble metal sulfates by roasting a mixture of LiCoO2 and NaHSO4·H2O. 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 LiCoO2 mixed with NaHSO4·H2O with increased temperature proceeded as follows: LiCoO2, NaHSO4H2O→LiCoO2, NaHSO4→Li1−xCoO2, LiNaSO4, Na2S2O7, Na2SO4→Li1−xCoO2, Co3O4, LiNaSO4, Na2SO4→Co3O4, LiNaSO4. The reaction mechanism of this roasting process may be as follows: LiCoO2+NaHSO4·H2O→1/2Li2SO4+ 1/2Na2SO4+1/3Co3O4+1/12O2+3/2H2O, Li2SO4+Na2SO4=2LiNaSO4.
KW - Chemical evolution
KW - In situ XRD
KW - LiCoO
KW - Roasting
UR - http://www.scopus.com/inward/record.url?scp=85076750568&partnerID=8YFLogxK
U2 - 10.1007/s40242-019-0010-9
DO - 10.1007/s40242-019-0010-9
M3 - Article
AN - SCOPUS:85076750568
SN - 1005-9040
VL - 36
SP - 908
EP - 914
JO - Chemical Research in Chinese Universities
JF - Chemical Research in Chinese Universities
IS - 5
ER -
