Phase equilibria in the system CaO-cobalt oxide in air
TL;DR: In this article, phase relations in the system CaO-cobalt oxide in air have been determined in the temperature range of approximately 800-1500°C, where the only crystalline phases existing in equilibrium with liquids are lime solid solution and CoO solid solution; eutectic temperature in air is 1350°C.
About: This article is published in Journal of Inorganic and Nuclear Chemistry.The article was published on 1970-05-01. It has received 150 citations till now. The article focuses on the topics: Solid solution & Eutectic system.
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TL;DR: The electrical conductivity, Seebeck coefficient and thermal conductivity of oxide were investigated in this article, showing that oxide is a potential material for high temperature thermoelectric energy conversion.
Abstract: The electrical conductivity, Seebeck coefficient and thermal conductivity of oxide Ca
9
Co
12
O
28
with Ca
2
Co
2
O
5
-type structure are 84 S cm
–1
, 118 µV K
–1
and 1.73 W m
–1
K
–1
respectively at 700 °C, and its figure of merit is 0.67×10
–4
K
–1
, showing that Ca
9
Co
12
O
28
is a potential material for high temperature thermoelectric energy conversion.
247 citations
TL;DR: The magnetic properties of Ca 3 Co 2 O 6 have been studied by magnetic susceptibility and neutron diffraction methods from 5 K to room temperature as discussed by the authors, and an effective magnetic moment of 5.7±0.2 μ B was found.
211 citations
TL;DR: This Review flows from past attempts to develop a (rechargeable) battery technology based on Ca via crucial breakthroughs to arrive at a comprehensive discussion of the current challenges at hand, and concludes with recommendations for future strategies to propel the Ca battery technology to reality and ultimately reach its full potential for energy storage.
Abstract: This Review flows from past attempts to develop a (rechargeable) battery technology based on Ca via crucial breakthroughs to arrive at a comprehensive discussion of the current challenges at hand. The realization of a rechargeable Ca battery technology primarily requires identification and development of suitable electrodes and electrolytes, which is why we here cover the progress starting from the fundamental electrode/electrolyte requirements, concepts, materials, and compositions employed and finally a critical analysis of the state-of-the-art, allowing us to conclude with the particular roadblocks still existing. As for crucial breakthroughs, reversible plating and stripping of calcium at the metal-anode interface was achieved only recently and for very specific electrolyte formulations. Therefore, while much of the current research aims at finding suitable cathodes to achieve proof-of-concept for a full Ca battery, the spectrum of electrolytes researched is also expanded. Compatibility of cell components is essential, and to ensure this, proper characterization is needed, which requires design of a multitude of reliable experimental setups and sometimes methodology development beyond that of other next generation battery technologies. Finally, we conclude with recommendations for future strategies to make best use of the current advances in materials science combined with computational design, electrochemistry, and battery engineering, all to propel the Ca battery technology to reality and ultimately reach its full potential for energy storage.
189 citations
TL;DR: In this article, the authors synthesized samples of the misfit-layered [CoCa2O3]qCoO2 compound with three different oxygen contents and characterized them by both wet-chemical and thermogravimetric analyses for the det
Abstract: We have synthesized samples of the misfit-layered [CoCa2O3]qCoO2 compound with three different oxygen contents and characterized them by both wet-chemical and thermogravimetric analyses for the det...
114 citations
TL;DR: In this paper, the properties of Ca3Co4O9 thermoelectric (TE) ceramics have been investigated using conventional sintering (CS), hot-pressing (HP) and spark plasma sinterings (SPS) for a reliable integration of these materials in practical devices.
103 citations
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