Structural study on nickel doped Li2FeSiO4

Jaén, Juan A.; Jiménez, M. J. Quiroz; Flores, Eibar; Muñóz, Alcides; Tabares, J. A.; Alcázar, G. A. Pérez

doi:10.1007/s10751-015-1176-2

Cited by 5 publications

(2 citation statements)

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“…These characteristic vibrational modes are in agreement with the observed results in literature. [23][24][25][26] The presence of carbon can noticed from the C-O vibrational modes near 1500 cm À1 for both orthorhombic and monoclinic LMS samples, which is not seen for solid state orthorhombic LMS material. These observations conrm the presence of carbon coating in sol-gel synthesized nanostructured materials.…”

Section: Resultsmentioning

confidence: 99%

Charge/discharge characteristics of Jahn–Teller distorted nanostructured orthorhombic and monoclinic Li₂MnSiO₄cathode materials

et al. 2017

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Li 2 MnSiO 4 is a promising cathode material for lithium ion rechargeable batteries, however, synthesizing the desired crystallographic phase is challenging. We report the synthesis and electrochemical charge/ discharge studies of carbon coated nanostructured Li 2 MnSiO 4 in orthorhombic and monoclinic crystallographic phases. Li 2 MnSiO 4 has been synthesized using solid state and sol-gel processes in bulk and nano-geometries without and with carbon coatings. The electrochemical performance of these Li 2 MnSiO 4 samples was measured at a C/20 charge/discharge rate within 1.

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Section: Resultsmentioning

confidence: 99%

Charge/discharge characteristics of Jahn–Teller distorted nanostructured orthorhombic and monoclinic Li₂MnSiO₄cathode materials

et al. 2017

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“…Several options for positive electrodes have been explored in the last few decades, motivated by safety concerns and cost. The field is highly dominated by Li-based compounds [7][8][9][10][11][12][13] . The high mobility of Li and the high energy density of these compounds make them ideal candidates for battery materials [14][15][16][17][18][19][20] .…”

Section: Introductionmentioning

confidence: 99%

Role of phonons in negative thermal expansion and high pressure phase transitions in β-eucryptite: An ab-initio lattice dynamics and inelastic neutron scattering study

Singh

Gupta

Mittal

et al. 2017

Journal of Applied Physics

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β-eucryptite (LiAlSiO 4 ) shows one-dimensional super-ionic conductivity as well as anisotropic thermal expansion behavior. We have performed inelastic neutron scattering measurements in β-eucryptite over 300-900 K and calculated the phonon spectrum using ab-initio density functional theory method. The calculated energy profile for cooperative lithium ion displacements indicates preferential movement of Li ion along the hexagonal c-axis in the high temperature phase. However, the energy barrier for Li ion diffusion is significantly reduced when a Schottky defect is introduced in the crystal. Further, the anisotropic stress dependence of the phonon spectrum is calculated to obtain the thermal expansion behavior along various axes. The calculations show that the Grüneisen parameters of the low-energy phonon modes around 10 meV have large negative values and govern the negative thermal expansion behavior both along the a-and c-axes. On the other hand, anisotropic elasticity along with anisotropic positive values of the Grüneisen parameters of the high-energy modes in the range 30 to 70 meV are responsible for positive thermal expansion in the a-b plane and negative expansion along the c-axis. The analysis of the polarization vectors of the phonon modes sheds light on the mechanism of the anomalous thermal expansion behavior. We extend the study to discuss the relationship of the soft phonons in the Brillouin zone with the observed high-pressure and high-temperature phase transitions as reported in the literature.

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Lattice dynamics of Li2FeSiO4/C from 57Fe Mössbauer spectroscopy

Jaén

Pino

2019

Hyperfine Interact

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Structural study on nickel doped Li2FeSiO4

Cited by 5 publications

References 46 publications

Charge/discharge characteristics of Jahn–Teller distorted nanostructured orthorhombic and monoclinic Li₂MnSiO₄cathode materials

Charge/discharge characteristics of Jahn–Teller distorted nanostructured orthorhombic and monoclinic Li₂MnSiO₄cathode materials

Role of phonons in negative thermal expansion and high pressure phase transitions in β-eucryptite: An ab-initio lattice dynamics and inelastic neutron scattering study

Lattice dynamics of Li2FeSiO4/C from 57Fe Mössbauer spectroscopy

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Structural study on nickel doped Li2FeSiO4

Cited by 5 publications

References 46 publications

Charge/discharge characteristics of Jahn–Teller distorted nanostructured orthorhombic and monoclinic Li2MnSiO4cathode materials

Charge/discharge characteristics of Jahn–Teller distorted nanostructured orthorhombic and monoclinic Li2MnSiO4cathode materials

Role of phonons in negative thermal expansion and high pressure phase transitions in β-eucryptite: An ab-initio lattice dynamics and inelastic neutron scattering study

Lattice dynamics of Li2FeSiO4/C from 57Fe Mössbauer spectroscopy

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Charge/discharge characteristics of Jahn–Teller distorted nanostructured orthorhombic and monoclinic Li₂MnSiO₄cathode materials

Charge/discharge characteristics of Jahn–Teller distorted nanostructured orthorhombic and monoclinic Li₂MnSiO₄cathode materials