ISIS Neutron and Muon Source Data Journal

Probing Transition Metal Migration in Cathode Materials for Na-ion Batteries with Neutron PDF

Abstract: Sodium layered oxides as cathode for Na-ion battery could exceed the energy density offered by Li-ion cathode thanks to two main advantages: (i) the activation of Fe3+/Fe4+ in Na2/3Fe1/2Mn1/2O2 and (ii) Oxygen redox without Oxygen loss in Na2/3Mn2/3Mg1/3O2. However those materials suffer from capacity/voltage fade or huge voltage hysteresis that limit their practical interest. We managed to combine those advantages while preventing their drawbacks in Na2/3(Mg,Mn,Fe)O2. The origin of such improvements is probably nested in the transition metal migration during (dis)charge. As neutron source offers a very good contrast between Fe/Mn/Mg and Na (contrarily to X-rays) and PDF is able to solve the short/medium range structure of those defected materials, neutron PDF appears to the only technique able to unambiguously reveal the transition metal migration during cycling.

Principal Investigator: Dr Edouard BOIVIN
Experimenter: Dr Helen Playford
Experimenter: Dr Matthew Roberts
Experimenter: Professor Peter Bruce

DOI: 10.5286/ISIS.E.RB1910326

ISIS Experiment Number: RB1910326

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 Edouard BOIVIN et al; (2019): Probing Transition Metal Migration in Cathode Materials for Na-ion Batteries with Neutron PDF, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1910326

Data is released under the CC-BY-4.0 license.