Insight into the origin of lithium/nickel ions exchange in layered Li (NixMnyCoz)O-2 cathode materials

doi:10.1016/j.nanoen.2018.04.020

	Insight into the origin of lithium/nickel ions exchange in layered Li (NixMnyCoz)O-2 cathode materials
	Liu, JJ; Liu, TC; Xiao, YG; Wang, FW; Liang, TJ; Zheng, JX; Xin, C; Teng, GF; Hu, ZX; Zhu, WM
刊名	NANO ENERGY
	2018
卷号	49 页码:77-85
关键词	Cathode materials Li/Ni exchange Neutron diffraction Magnetic frustration Triangular lattice
ISSN号	2211-2855
DOI	10.1016/j.nanoen.2018.04.020
文献子类	Article
英文摘要	In layered LiNixMnyCozO2 cathode material for lithium-ion batteries, the spins of transition metal (TM) ions construct a two-dimensional triangular networks, which can be considered as a simple case of geometrical frustration. By performing neutron powder diffraction experiments and magnetization measurements, we find that long-range magnetic order cannot be established in LiNixMnyCozO2 even at low temperature of 3 K. Remarkably, the frustration parameters of these compounds are estimated to be larger than 30, indicating the existence of strongly frustrated magnetic interactions between spins of TM ions. As frustration will inevitably give rise to lattice instability, the formation of Li/Ni exchange in LiNixMnyCozO2 will help to partially relieve the degeneracy of the frustrated magnetic lattice by forming a stable antiferromagnetic state in hexagonal sublattice with nonmagnetic ions located in centers of the hexagons. Moreover, Li/Ni exchange will introduce 180 degrees superexchange interaction, which further relieves the magnetic frustration through bringing in new exchange paths. Thus, the variation of Li/Ni exchange ratio vs. TM mole fraction in LiNixMnyCozO2 with different compositions can be well understood and predicted in terms of magnetic frustration and superexchange interactions. This provides a unique viewpoint to study the Li/Ni ions exchange in layered Li(NixMnyCoz)O-2 cathode materials.
电子版国际标准刊号	2211-3282
WOS关键词	ELECTROCHEMICAL PERFORMANCE ; THERMAL-STABILITY ; BATTERIES ; CHALLENGES ; LI(NIXMNYCOZ)O-2 ; SUBSTITUTION ; DIFFRACTION ; BEHAVIOR ; NI
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:000434829500010
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286034]
专题	高能物理研究所_东莞分部高能物理研究所_实验物理中心中国科学院高能物理研究所_中国散裂中子源
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Liu, JJ,Liu, TC,Xiao, YG,et al. Insight into the origin of lithium/nickel ions exchange in layered Li (NixMnyCoz)O-2 cathode materials[J]. NANO ENERGY,2018,49:77-85.
APA	Liu, JJ.,Liu, TC.,Xiao, YG.,Wang, FW.,Liang, TJ.,...&Chen, YB.(2018).Insight into the origin of lithium/nickel ions exchange in layered Li (NixMnyCoz)O-2 cathode materials.NANO ENERGY,49,77-85.
MLA	Liu, JJ,et al."Insight into the origin of lithium/nickel ions exchange in layered Li (NixMnyCoz)O-2 cathode materials".NANO ENERGY 49(2018):77-85.