Electronic Spin Transition in Nanosize Stoichiometric Lithium Cobalt Oxide

Electronic spin transition in nanosize stoichiometric lithium cobalt oxide.

A change in the electronic spin state of the surfaces relevant to Li (de)intercalation of nanosized stoichiometric lithium cobalt oxide LiCo(III)O(2) from low-spin to intermediate and high spin is observed for the first time. These surfaces are the ones that are relevant for Li (de)intercalation. From density functional theory calculations with a Hubbard U correction, the surface energies of th...

42 4 SURFACE SPIN TRANSITION IN NANO-SIZE STOICHIOMETRIC LiCoO2 AND ITS APPLICATIONS IN OXYGEN EVOLUTION REACTION / OXYGEN REDUCTION REACTION (OER/ORR) CATALYTIC PROCESS 4.1 Electronic Spin Transition in Nano-size Stoichiometric Lithium Cobalt Oxide

Spin-orbital superstructure in strained ferrimagnetic perovskite cobalt oxide.

We have investigated the Co-3d spin-orbital state in a thin film of perovskite LaCoO3 to clarify the origin of strain induced spontaneous magnetization (T(C)=94 K) by means of x-ray diffraction, optical spectroscopy, and magnetization measurements. A lattice distortion with the propagation vector (1/4 -1/4 1/4) and an anomalous activation of optical phonons coupled to Co-3d orbital are observed...

Pressure-Induced Antifluorite-to-Anticotunnite Phase Transition in Lithium Oxide

Using synchrotron angle-dispersive x-ray diffraction (ADXD) and Raman spectroscopy on samples of Li2O pressurized in a diamond anvil cell, we observed a reversible phase change from the cubic antifluorite (α, Fm3m) to orthorhombic anticotunnite (β, Pnma) phase at 50(±5) GPa at ambient temperature. This transition is accompanied by a relatively large volume collapse of 5.4 (±0.8) % and large hys...

Electronic Transport in Lithium Nickel Manganese Oxide , a High - Voltage Cathode Material for Lithium -

Potential routes by which the energy densities of lithium-ion batteries may be improved abound. However, the introduction of Lithium Nickel Manganese Oxide (LixNi1i/2Mn3/2O4, or LNMO) as a positive electrode material appears to be one of the shortest. LNMO is a high-voltage material, with a voltage of 4.7V, and thus offers a significant energy density boost without straying far outside of the s...