Advanced searches left 3/3

Cations and Anion - OSTI GOV

Summarized by Plex Scholar
Last Updated: 27 July 2022

* If you want to update the article please login/register

Cation and anion topotactic transformations in cobaltite thin films leading to Ruddlesden-Popper phases

Phase conversions can be performed using this perovskite oxide La 0. 7 Sr 0. 3 CoO 3 is an ideal device for investigating phase changes due to its high oxygen vacancy conductivity, low oxygen vacancy formation rate, and strong coupling of the magnetic and electronic properties to the oxygen stoichiometry. Although the change between cobaltite perovskite and brownmillerite phases has been widely reported, no systematic study has been done into this phase. The rarely observed crystalline Ruddlesden-Popper phase, which results in the absence of both oxygen anions and cobalt cations amid annealing, where the cobalt is found as isolated Co ions or Co nanoparticles.

Source link: https://www.osti.gov/biblio/1814034


Thermally Aged Li–Mn–O Cathode with Stabilized Hybrid Cation and Anion Redox

Low energy density, which is both low-cost and environmentally friendly, has caused Liu2013Mntu2013O cathodes to fail, despite being low-cost and environmentally friendly. Li 4 MnO 2 0 2 O 2 u2191, which produces near-surface reactive oxygen that is dangerous to cycling stability, was developed in this report. Full cells paired with Li 4 Ti 5 O 12 anode have a high retention over 100 cycles, with industrially acceptable electrolyte amounts.

Source link: https://www.osti.gov/biblio/1813968


Interplay of cation and anion redox in Li 4 Mn 2 O 5 cathode material and prediction of improved Li 4 (Mn,M) 2 O 5 electrodes for Li-ion batteries

A big discharge capacity was discovered last year when a rock salt2u2013type Li 4 Mn 2 O 5 cathode material with a high discharge capacity was discovered. To investigate both the disordered rock salt (U2013type Li 4 Mn 2 O 5 structure and the ordered ground-state structure, we used first-principles density functional theory calculations. An initial metal oxidation process, Mn 3+ Mn 4+ oxidation, followed by anion oxidation, O2192 Mn 5+ ; and finally, metal oxidation, Mn 4+ u2192 Mn 5+. We predict that mixing with M=V and Cr in Li 4 2 O 5 will produce new stable compounds with dramatically improved electrochemical stability.

Source link: https://www.osti.gov/biblio/1543999

* 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