Oxygen redox chemistry without excess alkali-metal ions in Na2/3[Mg0.28Mn0.72]O2
- Submitting institution
-
The University of Kent
- Unit of assessment
- 9 - Physics
- Output identifier
- 11596
- Type
- D - Journal article
- DOI
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10.1038/nchem.2923
- Title of journal
- Nature Chemistry
- Article number
- -
- First page
- 288
- Volume
- 10
- Issue
- 3
- ISSN
- 1755-4330
- Open access status
- Compliant
- Month of publication
- January
- Year of publication
- 2018
- URL
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https://kar.kent.ac.uk/65829/
- Supplementary information
-
-
- Request cross-referral to
- -
- Output has been delayed by COVID-19
- No
- COVID-19 affected output statement
- -
- Forensic science
- No
- Criminology
- No
- Interdisciplinary
- No
- Number of additional authors
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20
- Research group(s)
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P - Physics of Quantum Materials
- Citation count
- 154
- Proposed double-weighted
- No
- Reserve for an output with double weighting
- No
- Additional information
- -
- Author contribution statement
- This sodium-based cathode material has capacity beyond the normal limit and good cycling properties. Ramos led the measurements of the oxidation state of Mn using hard X-ray Absorption Near Edge Structure (XANES), collected at the Mn edge. These measurements were key to investigating both properties. They showed that changes in the oxidation state of Mn explain the initial(final) part of the charging(discharging) cycle, up to the point where Mn is in a +4 state, confirming that additional capacity is due to oxygen redox. They found no evidence of Mn+5 formation in the material, which partly explains its resilience to cycling.
- Non-English
- No
- English abstract
- -