Chemistry evolution of LiNi1/3Co1/3Mn1/3O2-NaHSO4 center dot H2O system during roasting

doi:10.1016/j.ssi.2019.05.018

	Chemistry evolution of LiNi1/3Co1/3Mn1/3O2-NaHSO4 center dot H2O system during roasting
	Zhang, Xiaodong 1; Wang, Dahui1 ; Chen, Huaijing2 ; Yang, Lixin 1; Yu, Yueshan 1; Xu, Li 1
	2019-10-15
发表期刊	SOLID STATE IONICS
ISSN	0167-2738
卷号	339
摘要	LiNi1/3Co1/3Mn1/3O2 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).
关键词	LiNi1/3Co1/3Mn1/3O2 Chemistry evolution Element occurrence Roasting In-situ XRD
DOI	10.1016/j.ssi.2019.05.018
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Chemistry ; Physics
WOS类目	Chemistry, Physical ; Physics, Condensed Matter
WOS记录号	WOS:000493213000012
出版者	ELSEVIER
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/64264
专题	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
通讯作者	Wang, Dahui
作者单位	1.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
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 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).