Chemistry evolution of LiNi1/3Co1/3Mn1/3O2-NaHSO4 center dot H2O system during roasting
Zhang, Xiaodong1; Wang, Dahui1; Chen, Huaijing2; Yang, Lixin1; Yu, Yueshan1; Xu, Li1
2019-10-15
Source PublicationSOLID STATE IONICS
ISSN0167-2738
Volume339
AbstractLiNi1/3Co1/3Mn1/3O2 is one of the key materials used in power lithium-ion batteries. At present, much attention is put on the study of chemical properties of LiNi1/3Co1/3Mn1/3O2 in acidic aqueous solutions. Different from the acidic aqueous solutions reaction system, this paper presents a study on the chemistry evolution of LiNi1/3Co1/3Mn1/3O2-NaHSO4 center dot H2O system with stoichiometric mass ratio of 1:4.30 during roasting process, which is studied by thermogravimetry-differential scanning calorimetry, in-situ X-ray diffraction, X-ray diffraction and X-ray photoelectron spectroscopy. The experimental results show that the quondam phase composition of the mixture is disappeared and transformed to its corresponding sulfates (LiNaSO4 and Na2Ni(SO4)(2) etc.). In the temperature range under 425 degrees C, the original structure of LiNi1/3Co1/3Mn1/3O2 is completely destroyed due to the lack of Li in the alpha-NaFeO2 layered structure, and the bimetallic sulfates were transformed and existed in the form of Na2M (SO4)(2) = Ni, Co, Mn) from 425 degrees C to 550 degrees C. The occurrence of Li, Ni, Co, and Mn elements evolves as follows: LiNi(1/3)Co(1/3)Mn(1/3)o(2) -> Li2SO4 -> LiNaSO4, LiNi1/3Co1/3Mn1/3O2 -> Na6Ni(SO4)(4) -> Na2Ni(SO4)(2), LiNi1/3Co1/3Mn1/3O2 -> CoSO4 -> Na6Co(SO4)(4) -> Na2Co(SO4)(2), LiNi1/3Co1/3Mn1/3O2 -> MnO2 -> Mn2O3 MnSO4 -> Na2Mn(SO4)(2), and the change of valence state of Co and Mn is +3 -> +2 and + 4 -> +3 -> +2, respectively. The chemistry reaction mechanism of this roasting process might be reactions as follows: 12LiNi(1/3)Co(1/3)Mm(1/3)O(2) + 36NaHSO(4)center dot H2O -> 18Na(2)SO(4) + 6Li(2)SO(4) + 4NiSO(4) + 4CoSO(4) + 4MnSO(4) + 54H(2)O + 3O(2), Li2SO4 + Na2SO4 -> 2LiNaSO(4), MeSO4 + 3Na(2)SO(4) -> Na6Me(SO4)(4) (Me = Ni, Co), Na6Me(SO4)(4) -> Na2Me (SO4)(2) + 2Na(2)SO(4), MnSO4 + Na2SO4 = Na2Mn(SO4)(2).
KeywordLiNi1/3Co1/3Mn1/3O2 Chemistry evolution Element occurrence Roasting In-situ XRD
DOI10.1016/j.ssi.2019.05.018
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51864032] ; Shenyang National Laboratory for Materials Science[18LHZD002] ; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals[18LHZD002]
WOS Research AreaChemistry ; Physics
WOS SubjectChemistry, Physical ; Physics, Condensed Matter
WOS IDWOS:000493213000012
PublisherELSEVIER
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64264
Collection省部共建有色金属先进加工与再利用国家重点实验室
材料科学与工程学院
理学院
Corresponding AuthorWang, Dahui
Affiliation1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
2.Lanzhou Univ Technol, Coll Sci, Lanzhou 730050, Gansu, Peoples R China
First Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Corresponding Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
First Signature AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Recommended Citation
GB/T 7714
Zhang, Xiaodong,Wang, Dahui,Chen, Huaijing,et al. Chemistry evolution of LiNi1/3Co1/3Mn1/3O2-NaHSO4 center dot H2O system during roasting[J]. SOLID STATE IONICS,2019,339.
APA Zhang, Xiaodong,Wang, Dahui,Chen, Huaijing,Yang, Lixin,Yu, Yueshan,&Xu, Li.(2019).Chemistry evolution of LiNi1/3Co1/3Mn1/3O2-NaHSO4 center dot H2O system during roasting.SOLID STATE IONICS,339.
MLA Zhang, Xiaodong,et al."Chemistry evolution of LiNi1/3Co1/3Mn1/3O2-NaHSO4 center dot H2O system during roasting".SOLID STATE IONICS 339(2019).
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