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Enhanced cycling stability in the anion redox material P3-type Zn-substituted sodium manganese oxide

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Linnell_2022ChemElectroChem_Enhancedcycling_CC.pdf (2.261Mb)
Date
07/06/2022
Author
Linnell, Stephanie F.
Hirsbrunner, Moritz
Imada, Saki
Cibin, Giannoantonio
Naden, Aaron B.
Chadwick, Alan V.
Irvine, John T. S.
Duda, Laurent C.
Armstrong, A. Robert
Funder
EPSRC
EPSRC
Grant ID
EP/R023751/1
EP/T019298/1
Keywords
Anion redox chemistry
Layered compounds
Positive electrode material
Sodium
Transition metal vacancies
QD Chemistry
NDAS
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Abstract
Sodium layered oxides showing oxygen redox activity are promising positive electrodes for sodium‑ion batteries (SIBs). However, structural degradation typically results in limited reversibility of the oxygen redox activity. Herein, the effect of Zn‑doping on the electrochemical properties of P3-type sodium manganese oxide, synthesised under air and oxygen is investigated for the first time. Air‑Na 0.67 Mn 0.9 Zn 0.1 O 2 and Oxy‑Na 0.67 Mn 0.9 Zn 0.1 O 2 exhibit stable cycling performance between 1.8 and 3.8 V, each maintaining 96% of their initial capacity after 30 cycles, where Mn 3+ /Mn 4+ redox dominates. Increasing the voltage range to 1.8‑4.3 V activates oxygen redox. For the material synthesised under air, oxygen redox activity is based on Zn, with limited reversibility. The additional transition metal vacancies in the material synthesised under oxygen result in enhanced oxygen redox reversibility with small voltage hysteresis. These results may assist the development of high‑capacity and structurally stable oxygen redox‑based materials for SIBs.
Citation
Linnell , S F , Hirsbrunner , M , Imada , S , Cibin , G , Naden , A B , Chadwick , A V , Irvine , J T S , Duda , L C & Armstrong , A R 2022 , ' Enhanced cycling stability in the anion redox material P3-type Zn-substituted sodium manganese oxide ' , ChemElectroChem , vol. 9 , no. 11 , e202200240 . https://doi.org/10.1002/celc.202200240
Publication
ChemElectroChem
Status
Peer reviewed
DOI
https://doi.org/10.1002/celc.202200240
ISSN
2196-0216
Type
Journal article
Rights
Copyright © 2022 The Authors. ChemElectroChem published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Description
Funding: Faraday Institution (Grant Number(s): FIRG018), Diamond Light Source (Grant Number(s): SP14239), Engineering and Physical Sciences Research Council (Grant Number(s): EP/L017008/1, EP/R023751/1, EP/T019298/1), SPRing8 (Grant Number(s): 2021A1425).
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/25506

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