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Cations and Anion - Springer Nature

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Last Updated: 27 July 2022

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Pushing the limit of 3d transition metal-based layered oxides that use both cation and anion redox for energy storage

Layered oxide compounds with anion redox are one of the most promising positive electrode materials for next-generation Li-ion batteries. For decades, intercalation chemistry has dominated electrochemical energy storage, but storage capacity worldwide has now hit the terawatt-hour level. While Li-ion battery cathodes for Li-ion batteries are manufactured within the limits of transition metal cation electrochemistry, the introduction of anion-redox reactions in recent decades has substantial potential for significantly raising stored energy densities. The discovery of new materials for next-generation cathodes has resulted from the abundance of substances that show anion redox in the solid state. We detail the methods that can contribute to anion redox and the accompanying kinetic pathways that may occur in layered transition metal oxides in this Review. Both the bulk structure and electrodeu2013electrolyte interphase can be investigated in a multiphase by combining characterization with computation, according to We emphasize the need for an integrated approach to investigating both the bulk structure and electrodeu2013electrolyte interphase.

Source link: https://doi.org/10.1038/s41578-022-00416-1


Time-resolved terahertz–Raman spectroscopy reveals that cations and anions distinctly modify intermolecular interactions of water

Ions in salt solutions disrupt the hydrogen bonding between the surrounding water molecules, changing the properties of water, but how ion polarity impacts this is not fully understood. It has now been established that intermolecular rotational-to-translational energy transfer is boosted by highly charged cations and reduced by highly charged anions. The intermolecular rotational-to-translational energy transfer is enhanced by highly charged cations and significantly reduced by highly charged anions, increasing with the ion surface charge density and ion concentrations, which increases the intermolecular rotational-to-translational energy transfer. The water-u2013water hydrogen-bond strength between the first and second solvation shells of cations increases, although it decreases around anions. The opposite effects of cations and anions on water's intermolecular interactions mimic protein synthesis and denaturation of proteins.

Source link: https://doi.org/10.1038/s41557-022-00977-2

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions