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

doi:10.1016/j.ssi.2019.05.018

	Chemistry evolution of LiNi1/3Co1/3Mn1/3O2-NaHSO4·H2O system during roasting
	Zhang, Xiaodong 1; Wang, Dahui 1; Chen, Huaijing 2; Yang, Lixin 1; Yu, Yueshan 1; Xu, Li 1
刊名	Solid State Ionics
	2019-10-15
卷号	339
关键词	Calcination Differential scanning calorimetry Lithium-ion batteries Manganese Manganese oxide Nickel sulfates Sodium sulfate Sulfur compounds Thermogravimetric analysis X ray diffraction X ray photoelectron spectroscopy Acidic aqueous solution Element occurrence In-situ X-ray diffraction In-situ XRD LiNi1/3Co1/3Mn1/3O2 Original structures Power lithium ion batteries Roasting
ISSN号	01672738
DOI	10.1016/j.ssi.2019.05.018
英文摘要	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·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 °C, the original structure of LiNi1/3Co1/3Mn1/3O2 is completely destroyed due to the lack of Li in the α-NaFeO2 layered structure, and the bimetallic sulfates were transformed and existed in the form of Na2M(SO4)2 (M = Ni, Co, Mn) from 425 °C to 550 °C. The occurrence of Li, Ni, Co, and Mn elements evolves as follows: LiNi1/3Co1/3Mn1/3O2 → Li2SO4 → LiNaSO4, LiNi1/3Co1/3Mn1/3O2 → NiSO4 → 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: 12LiNi1/3Co1/3Mn1/3O2 + 36NaHSO4·H2O → 18Na2SO4 + 6Li2SO4 + 4NiSO4 + 4CoSO4 + 4MnSO4 + 54H2O + 3O2, Li2SO4 + Na2SO4 → 2LiNaSO4, MeSO4 + 3Na2SO4 → Na6Me(SO4)4 (Me = Ni, Co), Na6Me(SO4)4 → Na2Me(SO4)2 + 2Na2SO4, MnSO4 + Na2SO4 = Na2Mn(SO4)2. © 2019 Elsevier B.V.
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	Elsevier B.V., Netherlands
WOS记录号	WOS:000493213000012
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113846]
专题	材料科学与工程学院理学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.College of Science, Lanzhou University of Technology, Lanzhou; 730050, China
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·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·H2O system during roasting.Solid State Ionics,339.
MLA	Zhang, Xiaodong,et al."Chemistry evolution of LiNi1/3Co1/3Mn1/3O2-NaHSO4·H2O system during roasting".Solid State Ionics 339(2019).