Vibrational and impedance spectroscopic studies on lithium vanadate prepared by solid-state reaction

Vijayakumar, M.; Selvasekarapandian, S.; Kesavamoorthy, R.; Nakamura, Kōichi; Kanashiro, Tatsuo

doi:10.1016/s0167-577x(03)00137-x

Cited by 23 publications

(15 citation statements)

References 19 publications

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“…The average force constant also increased with Ni substitution, which is consistent with the variation of the A 1g Raman shift. This indicates that Ni substitution gave rise to more stabled [Mn(Ni)O 6 ] octahedron in spinel LiNi x Mn 2 À x O 4 .The force constant can be related to the average Mn(Ni) -O bond length (r) by the equation[32],f ¼ 17=r 3 ð3ÞFig. 9 shows the variation of the average Mn(Ni) -O bond length as a function of Ni content in LiNi x Mn 2 À x O 4 .…”

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Spectroscopic studies of the structural properties of Ni substituted spinel LiMn2O4

et al. 2006

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“…It should be noted that in this study, the A 1g mode only gave average information on the [Mn(Ni)O 6 ] octahedron because the Mn 4+ -O, Mn 3+ -O and Ni -O Raman bands are difficult to separate due to the similar Raman scattering of the three bonds. The vibrational frequency of the A 1g symmetrical stretching is determined by the equation[32] …”

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Spectroscopic studies of the structural properties of Ni substituted spinel LiMn2O4

et al. 2006

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“…Moreover, the VO stretching vibration of Bis‐VPF at 941 cm −1 and the bending vibration of VO bonds in Bis‐VPF at 649, 607, and 435 cm −1 are not observed in the spectrum of Bis‐PF. Due to a strong VO bond at 822 cm −1 is overlapped with the peak of para CH substitutions on the phenolic ring, the peak at 822 cm −1 in the spectrum of Bis‐VPF became large as it compared with the peak at 756 cm −1 . Therefore, the differences between the two spectra of Bis‐VPF and Bis‐PF confirm the formation of VO bonds in Bis‐VPF and the consumption of OH groups in Bis‐PF due to the reaction between Bis‐PF and vanadate.…”

Section: Resultsmentioning

confidence: 99%

Preparation of vanadium-modified phenolic resin/modified zirconia composites and its applied properties in cubic boron nitride (cBN) grinding wheels

2015

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In this work, novolac bisphenol‐F‐based vanadium–phenolic resin/modified zirconia (Bis‐VPF/m‐ZrO) composites were obtained successfully. In the preparation process, ammonium vanadate reacted with Bis‐PF resin to form Bis‐VPF resin with the VO chemical bonds. Simultaneously, zirconia (ZrO2) was modified with N‐(2‐aminoethyl‐3‐aminopropyl)trimethoxysilane (AEAPTMS). Then, this modified zirconia (m‐ZrO) was fully mixed with Bis‐VPF to form Bis‐VPF/m‐ZrO composites. The thermal properties and mechanical strength of Bis‐VPF are higher than those of Bis‐PF. When the m‐ZrO was additionally incorporated into Bis‐VPF, the well‐dispersed and well‐adhered m‐ZrO can further promote all the above‐mentioned properties of the composites. Furthermore, Bis‐VPF/m‐ZrO was compared with Bis‐PF in the performance as a binder for cBN grinding wheels. The results of grinding experiments indicated that Bis‐VPF/m‐ZrO is a better binding resin than Bis‐PF, and so the grinding wheels made from the Bis‐VPF/m‐ZrO composites have better grinding effect and quality. POLYM. COMPOS., 37:3354–3364, 2016. © 2015 Society of Plastics Engineers

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“…Laser Raman spectra were recorded using Renishaw inVia Raman microscope instrument in the range 200-1400 cm -1 . The appearance of the intensity peak at 948 cm -1 arises from the symmetric vibration of the V=O double bond contains contribution of oxygen atom since they show low intensity upon lithium substitution [6]. In Figure 2 shows a strong broad band in the 700-850 cm -1 region is ascribable to the stretching frequencies of the VO 4 tetrahedral stretching frequencies [4].…”

Section: Methodsmentioning

confidence: 93%

Synthesis and Characterization of LiMVO[sub 4] Cathode Material Produced by Sol-gel Method

Prakash¹,

Jayachandran²,

Sanjeeviraja³

et al. 2011

AIP Conference Proceedings

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Articles you may be interested inEffects of lithium doping on microstructure, electrical properties, and chemical bonds of sol-gel derived NKN thin films J. Appl. Phys. 117, 085307 (2015); 10.1063/1.4913708 Sol-gel auto-combustion synthesis of Li3xMnFe2−xO4 and their characterizations J. Appl. Phys. 112, 043902 (2012); 10.1063/1.4746746 Preparation and characterization of Eu: Ti codoped LiNbO 3 films prepared by the sol-gel method Epitaxial growth and characterization of stoichiometric Li Nb O 3 films prepared by the sol-gel methodAbstract. Lithium manganese vanadate (LiMnVO 4 ) has been prepared by a sol-gel method. XRD analysis reveals that the prepared sample possess orthorhombic structure. Laser Raman spectrum shows the local environment of cations vibrational modes with respect to neighboring oxygen atom. The ionic conductivity of the sample is found to be 8.5 X 10 -5 Scm -1 at 350 °C.

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Vibrational and impedance spectroscopic studies on lithium vanadate prepared by solid-state reaction

Cited by 23 publications

References 19 publications

Spectroscopic studies of the structural properties of Ni substituted spinel LiMn2O4

Spectroscopic studies of the structural properties of Ni substituted spinel LiMn2O4

Preparation of vanadium-modified phenolic resin/modified zirconia composites and its applied properties in cubic boron nitride (cBN) grinding wheels

Synthesis and Characterization of LiMVO[sub 4] Cathode Material Produced by Sol-gel Method

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