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Now showing items 11-20 of 83
Li-Ni-Mn-Co-Ti-O Voltage Profile
(2014-08-11)
The performance enhancements associated with Ti substitution of Co in the layered cathode material Li1(NixMnxCo1-2x)O2 were investigated using density functional theory calculations. Examining the structural and electronic ...
NaCl–KCl: The role of excess vibrational entropy
(2013-04-08)
First principles phase diagram calculations were performed for the system NaCl–KCl. Plane-wave pseudopotential calculations of formation energies were used as a basis for fitting cluster expansion Hamiltonians, both with ...
NaNbO3–KNbO3: Can spinodal decomposition generate relaxor ferroelectricity?
(2013-04-08)
First principles based phase diagram calculations were performed for the system (1−X) NaNbO3–(X) KNbO3. Plane wave pseudopotential calculations of formation energies were used as a basis for fitting a cluster expansion ...
CaCO3-MgCO3 and CdCO3-MgCO3
(2014-11-20)
Planewave pseudopotential calculations of supercell total energies were used as bases for firstprinciples calculations of the CaCO3–MgCO3 and CdCO3–MgCO3 phase diagrams. Calculated phase diagrams are in qualitative to ...
Hf-Ox First principles phase diagram calculations for the octahedral-interstitial system
(2013-04-03)
The group IV hexagonal closest packed (hcp) suboxides MOX (M = Ti, Zr or Hf) all exhibit octahedral interstitial ordering of oxygen, O, and vacancies, in solid solutions of the form View the MathML source, 0≤X≤1/2. By far, ...
First principles phase diagram calculations for the wurtzite-structure systems AlN-GaN, GaN-InN, and AlN-InN
(2014-11-20)
First principles phase diagram calculations were performed for the wurtzite-structure quasibinary systems AlN–GaN, GaN–InN, and AlN–InN. Cluster expansion Hamiltonians that excluded, and included, excess vibrational ...
Np incorporation into metal organic frameworks
(2014-08-11)
Elemental vacancy diffusion for fcc and hcp structures
(2014-08-08)
This work demonstrates how databases of diffusion-related properties can be developed from high-throughput ab initio calculations. The formation and migration energies for vacancies of all adequately stable pure elements ...
GeTe-PbTe PbS-PbTe PbSe-PbS PbTe-PbSe PbTe-SnTe SnTe-GeTe mixing and coherency strain energies
(2012-10-15)
Nanostructures formed by phase separation improve the thermoelectric figure of merit in lead chalcogenide semiconductor alloys, with coherent nanostructures giving larger improvements than incoherent nanostructures. However, ...