St Andrews Research Repository

St Andrews University Home
View Item 
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

High voltage Mg-doped Na0.67Ni0.3-xMgxMn0.7O2 (x = 0.05, 0.1) Na-ion cathodes with enhanced stability and rate capability

Thumbnail
View/Open
Armstrong_2016_CM_Na_ionCathodes_CC.pdf (3.956Mb)
Date
26/07/2016
Author
Singh, Gurpreet
Tapia-Ruiz, Nuria
Lopez Del Amo, Juan Miguel
Maitra, Urmimala
Somerville, James W.
Armstrong, A. Robert
Martinez de Ilarduya, Jaione
Rojo, Teófilo
Bruce, Peter G.
Keywords
QD Chemistry
Materials Chemistry
Chemical Engineering(all)
Chemistry(all)
NDAS
Metadata
Show full item record
Altmetrics Handle Statistics
Altmetrics DOI Statistics
Abstract
Magnesium substituted P2-structure Na0.67Ni0.3Mn0.7O2 materials have been prepared by a facile solid-state method and investigated as cathodes in sodium-ion batteries. The Mg-doped materials described here were characterized by X-ray diffraction (XRD), 23Na solid-state nuclear magnetic resonance (SS-NMR), and scanning electron microscopy (SEM). The electrochemical performance of the samples was tested in half cells vs Na metal at room temperature. The Mg-doped materials operate at a high average voltage of ca. 3.3 V vs Na/Na+ delivering specific capacities of ∼120 mAh g-1, which remain stable up to 50 cycles. Mg doping suppresses the well-known P2-O2 phase transition observed in the undoped composition by stabilizing the reversible OP4 phase during charging (during Na removal). GITT measurements showed that the Na-ion mobility is improved by 2 orders of magnitude with respect to the parent P2-Na0.67Ni0.3Mn0.7O2 material. The fast Na-ion mobility may be the cause of the enhanced rate performance.
Citation
Singh , G , Tapia-Ruiz , N , Lopez Del Amo , J M , Maitra , U , Somerville , J W , Armstrong , A R , Martinez de Ilarduya , J , Rojo , T & Bruce , P G 2016 , ' High voltage Mg-doped Na 0.67 Ni 0.3-x Mg x Mn 0.7 O 2 (x = 0.05, 0.1) Na-ion cathodes with enhanced stability and rate capability ' , Chemistry of Materials , vol. 28 , no. 14 , pp. 5087-5094 . https://doi.org/10.1021/acs.chemmater.6b01935
Publication
Chemistry of Materials
Status
Peer reviewed
DOI
https://doi.org/10.1021/acs.chemmater.6b01935
ISSN
0897-4756
Type
Journal article
Rights
This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Description
At CIC Energigune this work was financially supported by LINABATT project from Ministerio de Economía Competitividad (ENE2013-44330-R). P.G.B. (University of Oxford) is indebted to the Engineering and Physical Sciences Research Council, including the SUPERGEN program, for financial support.
Collections
  • University of St Andrews Research
URL
http://www.scopus.com/inward/record.url?scp=84979889703&partnerID=8YFLogxK
URI
http://hdl.handle.net/10023/9306

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Advanced Search

Browse

All of RepositoryCommunities & CollectionsBy Issue DateNamesTitlesSubjectsClassificationTypeFunderThis CollectionBy Issue DateNamesTitlesSubjectsClassificationTypeFunder

My Account

Login

Open Access

To find out how you can benefit from open access to research, see our library web pages and Open Access blog. For open access help contact: openaccess@st-andrews.ac.uk.

Accessibility

Read our Accessibility statement.

How to submit research papers

The full text of research papers can be submitted to the repository via Pure, the University's research information system. For help see our guide: How to deposit in Pure.

Electronic thesis deposit

Help with deposit.

Repository help

For repository help contact: Digital-Repository@st-andrews.ac.uk.

Give Feedback

Cookie policy

This site may use cookies. Please see Terms and Conditions.

Usage statistics

COUNTER-compliant statistics on downloads from the repository are available from the IRUS-UK Service. Contact us for information.

© University of St Andrews Library

University of St Andrews is a charity registered in Scotland, No SC013532.

  • Facebook
  • Twitter