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Insight into the origin of lithium/nickel ions exchange in layered Li (NixMnyCoz)O-2 cathode materials
Xiao, YG; Liu, TC; Liu, JJ; He, LH; Chen, J; Zhang, JR; Luo, P; Lu, HL; Wang, R; Zhu, WM; Hu, ZX; Teng, GF; Xin, C; Zheng, JX; Liang, TJ; Wang, FW; Chen, YB; Huang, QZ; Pan, F; Chen, HS; Chen J(陈洁); Zhang JR(张俊荣); Luo P(罗平); Lu HL(卢怀乐); Liang TJ(梁天骄); Chen YB(陈元柏); Chen HS(陈和生)
Source PublicationNANO ENERGY
AbstractIn 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.
KeywordCathode materials Li/Ni exchange Neutron diffraction Magnetic frustration Triangular lattice
Indexed BySCI ; EI
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000434829500010
EI Accession Number20181705046492
Citation statistics
Document Type期刊论文
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Xiao, YG,Liu, TC,Liu, JJ,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 Xiao, YG.,Liu, TC.,Liu, JJ.,He, LH.,Chen, J.,...&陈和生.(2018).Insight into the origin of lithium/nickel ions exchange in layered Li (NixMnyCoz)O-2 cathode materials.NANO ENERGY,49,77-85.
MLA Xiao, YG,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.
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