A classic example of cobaltites with a low-spin configuration of cobalt ions is lithium cobaltite LiCoO 2 that is a well-known material for power source cathodes. The nature of holes in defective cobaltites of the Li x CoO 2 (x < 1) type is considered. It is shown that holes arising from defects in the lithium sublattice are of an oxygen nature.

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Reddish silver white, Violet steel gray, Black. Density: 6.33. Diaphaneity: Opaque. Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals. Habit: Granular …

Nickel cobaltite: This Minireview gives an overview of the recent research activities dedicated to NiCo2O4 and its composites to assemble high-performance hybrid supercapacitors.

Cobalt usually occurs in the form of sulfite or with arsenic. Cobalt minerals are cobaltite CoAsS, linnaeite Co3 S 4, smaltite (Co,Ni)As, and carrolite CuCo 2 S 4. Cobalt can have a valence from − 1 to + 4, but in water it appears as the ion Co 2+. In anthropogenically contaminated water, Co can bind with cyanide or ammonia as K 4 [Co (CN) 6] and K 3 …

We have reviewed the research progress of transition metal cobaltite materials and their composites in SCs, LIBs, electrocatalysis and electrochemical sensors in recent years.

The catalytic performance of various transition metal (M = Cu, Mn, and Ni) cobaltites prepared by nanocasting method were investigated for the selective catalytic reduction (SCR) of NO under lean ...

A novel solid-solution precursor method for the preparation of fine-particle cobaltites at low temperatures has been described. The precursors, hydraz…

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Special emphasis is placed on a comprehensive discussion of cobaltite physical properties in different structural families. Providing a thorough introduction to cobalt oxides from a chemical and physical viewpoint as a basis for understanding their intricacies, this is a must-have for both experienced researchers as well as entrants to …

In this paper, the electrocatalytic performance of cobaltite spinels for oxygen evolution reaction (OER) in alkaline electrolysis is studied. Cobaltit…

Using density functional theory plus self-consistent Hubbard (DFT) calculations, we have investigated the structural and electronic properties of the rare-earth cobaltites textit {R}CoO (textit {R} = Pr -- Lu). Our calculations show the evolution of crystal and electronic structure of the insulating low-spin (LS) textit {R}CoO with increasing rare …

Cobalt is generally obtained from the minerals cobaltite and smaltite (cobalt arsenide). Other cobalt-bearing minerals include erythrite, glaucodot and linnaeite (cobalt sulfide). …

We have applied density functional theory and high-resolution transmission electron microscopy to investigate the relationship between chemically induced strain and charge transfer on the structural, electronic, vibrational, and thermoelectric properties of misfit layered cobaltites (M2CoO3)0.6CoO2 (M = Mg, Ca, Sr, Ba). The electron and phonon …

Spinel cobaltites are widely presented as promising pseudocapacitive materials, however, a fundamental understanding of their structure–property relationship at an atomic level remains vague. Herein, their geometrical-site-dependent charge storage capability is investigated by substituting Co with inactive Zn and redox-active Mn. …

Mn, Ni and Cu cobaltite spinels were synthesized by coprecipitation, characterized and evaluated in the total oxidation of methane. To gain a deeper i…

These alphabetical listings include synonyms of accepted mineral names, pronunciation of that name, name origins, and locality information. Visit our expanded selection of …

Combining electron diffraction, x-ray diffraction, and high-resolution electron microscopy techniques, a structural model for the cobaltite " Ca 3 Co 4 O 9 " has been found. This compound is a misfit-layered oxide consisting in two monoclinic subsystems with identical a, c, and β parameters, but different b parameters: a = 4.8376 ( 7) Å, c = …

This study presents a review of cobalt geometallurgy with an overview of cobalt geology, mineralogy, physical ore properties and mineral processing practices. …

Cobaltite is a strategically significant mineral (Fig. 1.17) composed of cobalt, arsenic, and sulfur (CoAsS) crystallizing in the orthorhombic (or pseudocubic) system resembling pyrite. It contains up to 10% iron and a valuable amount of nickel. The name is derived from the German "Kobold" meaning "underground spirit" or "goblin" in ...

The group of BaLnCo2O6-δ cobaltites (Ln – lanthanides) are promising well-recognized mixed ionic-electronic conductors, with a mobile electrons/electron holes, oxygen ions, and, in some cases, protons. Such a materials can be applied in the hydrogen technology sector e.g. as electrodes for proton ceramic fuel cells and electrolysers [1,2]. …

Description. A common ore commercially mined from moons, Cobaltite is very useful as it yields good quantities of Cobalt, a significant element of many advanced materials.

In this aspect, cobaltite system with spinel structure has been the subject of intense research due to its established applications in electrochemistry. Besides, carbonaceous materials like activated carbons, carbon nanotubes, graphites, graphenes and fullerenes utilize electric double-layer capacitance whereby energy is stored by …

Cobalt (Co) is a chemical element with the atomic number 27 and an atomic mass of 58.93 g/mol. It is a hard, brittle, and silver-gray metal that belongs to the transition metals group in the periodic table. …

Atomically engineered cobaltite layers for robust ferromagnetism. Emergent phenomena at heterointerfaces are directly associated with the bonding geometry of adjacent layers. Effective control of accessible parameters, such as the bond length and bonding angles, offers an elegant method to tailor competing energies of the electronic …

cobaltite, a cobalt sulfoarsenide mineral in which iron commonly replaces part of the cobalt [ (Co,Fe)AsS], that occurs in high-temperature deposits. Notable occurrences are at …

Hyperstoichiometric (p-type) misfit-layered calcium cobaltites have been studied as components in various high-temperature electrochemical devices. Multiple studies have reported their …

In the following, we report on the magnetic properties of the 12H hexagonal perovskite, Ba 0.9 CoO 2.6, and especially on the abrupt magnetization jumps observed at low T (<5 K). These data are compared to those obtained for the oxygen stoïchiometric 2H-BaCoO 3 phase and those reported for Ca 3 Co 2 O 6[11], [12], [13], [14], [15].

Herein, we report a strategy to design novel spinel metal cobaltite nanostructures with multiple transition metal heteroatoms so as to achieve optimized capacitive performance.