Crystal growth and magnetic characterization of a tetragonal polymorph of NiNb2O6

Munsie, Timothy; Millington, A.; Dube, Paul A.; Dąbkowska, H. A.; Britten, James F.; Luke, G. M.; Greedan, John E.

doi:10.1016/j.jssc.2015.07.048

Cited by 12 publications

(2 citation statements)

References 21 publications

(22 reference statements)

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“…where F is the internal field, T is the temperature, T C is the transition (critical) temperature and β is the critical exponent for the order parameter. A value of T N = 14.5(3) K was determined from the fit, which agrees well with previous measurements 23 . The fit also yielded a value for the critical exponent β = 0.25 (3), which is lower than typical values for 3D universality classes.…”

Section: B Zero Field µSr On the β-Ninb2o6 Polymorphsupporting

confidence: 90%

“…All the Ni ions are ordered in the Γ 1 and Γ 5 models, while for Γ 3 and Γ 7 only Ni ions in every other layer are ordered. The Γ 3 and Γ 7 , taken separately, seems physically unreasonable as well; there is no experimental evidence that half of the spins remain either paramagnetic or in a two-dimensional correlated state at 3.5 K. For example, there is no low temperature Curie-Weiss tail in the measured susceptibility 23 and the peak shape of the magnetic reflections, Fig. 5, shows no Warren-like feature.…”

Section: A Magnetic Structure Of the β-Ninb2o6 Polymorphmentioning

confidence: 95%

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Neutron diffraction and μSR studies of two polymorphs of nickel niobate NiNb2O6

et al. 2017

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Neutron diffraction and muon spin relaxation (µSR) studies are presented for the newly characterized polymorph of NiNb2O6 (β-NiNb2O6) with space group P42/n and µSR data only for the previously known columbite structure polymorph with space group Pbcn. The magnetic structure of the P42/n form was determined from neutron diffraction using both powder and single crystal data. Powder neutron diffraction determined an ordering wave vector k = ( 1 2 , 1 2 , 1 2 ). Single crystal data confirmed the same k-vector and showed that the correct magnetic structure consists of antiferromagnetically-coupled chains running along the a or b-axes in adjacent Ni 2+ layers perpendicular to the c-axis, which is consistent with the expected exchange interaction hierarchy in this system. The refined magnetic structure is compared with the known magnetic structures of the closely related tri-rutile phases, NiSb2O6 and NiTa2O6. µSR data finds a transition temperature of TN ∼ 15 K for this system, while the columbite polymorph exhibits a lower TN = 5.7(3) K. Our µSR measurements also allowed us to estimate the critical exponent of the order parameter β for each polymorph. We found β = 0.25(3) and 0.16(2) for the β and columbite polymorphs respectively. The single crystal neutron scattering data gives a value for the critical exponent β = 0.28(3) for β-NiNb2O6, in agreement with the µSR value. While both systems have β values less than 0.3, which is indicative of reduced dimensionality, this effect appears to be much stronger for the columbite system. In other words, although both systems appear to well-described by S = 1 spin chains, the interchain interactions in the β-polymorph are likely much larger.

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Section: B Zero Field µSr On the β-Ninb2o6 Polymorphsupporting

confidence: 90%

Section: A Magnetic Structure Of the β-Ninb2o6 Polymorphmentioning

confidence: 95%

Neutron diffraction and μSR studies of two polymorphs of nickel niobate NiNb2O6

et al. 2017

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Nickel Niobate Anodes for High Rate Lithium‐Ion Batteries

Xia

Zhao

Kuo

et al. 2021

Advanced Energy Materials

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Nowadays, fast charging ability of energy storage devices is essential for applications in electric vehicles and electrical power grids. The fast charging performance of batteries is enabled by highrate electrode materials. which have been realized through various methods such as nanosizing, porous structures, carboncoatings, and conductive materials-based hierarchical structures. [1] Nanosizing and porous structures can enhance the lithium-ion transport as they reduce the distance lithium ions have to diffuse in the solid electrode, and they also enlarge the contact area between the liquid electrolyte and the electrode material. [2] Carbon-coatings and conductive materials (e.g., graphene or Mxene) based hierarchical structures can enhance the electrical conductivity of the electrodes to enable higher current densities. [3] However, nanosizing and porous structures lead to a reduction of the specific volumetric capacity, while composites with carbon-based conductive materials require the electrode to discharge down to 0.01 V resulting in lithium dendrite formation under high current densities. [4][5][6] The formation of nanostructures can even result in a reduced electrochemical performance at high C rates as compared to their bulk materials due to possible morphology change, nanostructure collapse, and higher first-cycle capacity loss. [7][8][9] Furthermore, the fabrication of these delicate nano-architectures, porous structures, and composites usually require harsh synthesis environments, expensive reactants, and multiple synthesis steps, which results in a complex and expensive synthesis process. Additionally, such synthesis methods often provide either relatively low yields or significant amounts of chemical waste.Recent studies increasingly focus on the development of electrode materials with an intrinsic high-rate performance by combining the advantages of exhibiting 1) a suitable host structure for fast lithium-ion intercalation, 2) a lower bandgap to enhance the electrical conductivity, and 3) a higher working voltage to avoid lithium dendrite formation. Titanium-based oxides, such as Li 4 Ti 5 O 12 and anatase TiO 2 , are well known as interesting electrode materials, while they exhibit working voltages of 1.55 and 1.8 V, [10,11] respectively, preventing lithium plating. However, in order to obtain high rate performance,

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ChemInform Abstract: Crystal Growth and Magnetic Characterization of a Tetragonal Polymorph of NiNb₂O₆.

et al. 2016

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Crystal growth and magnetic characterization of a tetragonal polymorph of NiNb2O6

Cited by 12 publications

References 21 publications

Neutron diffraction and μSR studies of two polymorphs of nickel niobate NiNb2O6

Neutron diffraction and μSR studies of two polymorphs of nickel niobate NiNb2O6

Nickel Niobate Anodes for High Rate Lithium‐Ion Batteries

ChemInform Abstract: Crystal Growth and Magnetic Characterization of a Tetragonal Polymorph of NiNb₂O₆.

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Crystal growth and magnetic characterization of a tetragonal polymorph of NiNb2O6

Cited by 12 publications

References 21 publications

Neutron diffraction and μSR studies of two polymorphs of nickel niobate NiNb2O6

Neutron diffraction and μSR studies of two polymorphs of nickel niobate NiNb2O6

Nickel Niobate Anodes for High Rate Lithium‐Ion Batteries

ChemInform Abstract: Crystal Growth and Magnetic Characterization of a Tetragonal Polymorph of NiNb2O6.

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ChemInform Abstract: Crystal Growth and Magnetic Characterization of a Tetragonal Polymorph of NiNb₂O₆.