ISIS Neutron and Muon Source Data Journal

Seeking experimental proof of anionic redox in high capacity cathodes 1.

Abstract: The high capacities (> 250 mAh g?1) of Li-cathode materials have been attributed to reversible anionic redox stabilized by the formation of ?peroxo-like? O-O dimers in layered (Li/Na)2RuO3 and 3D ?-Li2IrO3 structures. The formation of peroxo-like dimers is believed to stabilize O2-/O1.5- redox by the sharing of one electron hole between each oxygen in the pair. Peroxo-like distances have been proposed by Bragg diffraction, TEM or EXAFS. Unlike PDF, these techniques are not a direct probe of actual distribution of ? interatomic distances, and large uncertainties surround the estimated distances or existence of peroxo-like dimers. We propose to study the origin of anionic redox in Li0.5RuO3 and Na0.5RuO3 c by a new and comprehensive approach combining PDF and advanced spectroscopies that we have been successfully implemented in the characterization Mn-based high capacity cathodes.

Principal Investigator: Dr Maria Diaz-Lopez
Local Contact: Dr Ronald Smith

DOI: 10.5286/ISIS.E.RB2010763

ISIS Experiment Number: RB2010763

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Maria Diaz-Lopez et al; (2020): Seeking experimental proof of anionic redox in high capacity cathodes 1., STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2010763

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