The effect of doping LiMn2O4 spinel on its use as a cathode in Li-ion batteries: Neutron diffraction and electrochemical studies

Bellitto, C., Bauer, E.M., Righini, G., Green, M.A., Branford, W.R., Antonini, A., Pasquali, M. (2004) The effect of doping LiMn2O4 spinel on its use as a cathode in Li-ion batteries: Neutron diffraction and electrochemical studies. Journal of Physics and Chemistry of Solids, 65 (1). pp. 29-37. ISSN 0022-3697. (doi:10.1016/j.jpcs.2003.09.003) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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http://dx.doi.org/10.1016/j.jpcs.2003.09.003

Abstract

A series of compounds Li1+yMn2-xM� xO4 (x�0.1;y�0.02), have been synthesised by doping the parent LiMn2O4 spinel with various metal ions of variable oxidation state. Powder neutron diffraction data has been collected on these samples alongside a series of electrochemical experiments in order to elucidate the relationship between structure on the performance of these systems as Li batteries. Doping the LiMn2O4 spinel with a small amount of metal ions has a remarkable effect on the electrochemical properties. Whereas the capacity of the spinels doped with trivalent ions is much greater, the cycling fading properties are much enhanced with using divalent ions as dopants. The underlying reasons for this are discussed, and it is suggested that the occupancy of the tetrahedral site with divalent ions to form a more compact structure offers an improved structural stability to support greater Li insertion/extraction, but which ultimately prevents the free movement of Li also sited on the tetrahedral site of the lattice. © 2003 Elsevier Ltd. All rights reserved.

Item Type: Article
DOI/Identification number: 10.1016/j.jpcs.2003.09.003
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - J Phys Chem Solids [Field not mapped to EPrints] AD - Ist. di Struttura della Mat. del CNR, Via Salaria Km. 29.3, I-00016 Monterotondo Staz. Roma, Italy [Field not mapped to EPrints] AD - Royal Institution of Great Britain, 21 Albemarle Street, London W1X 4BS, United Kingdom [Field not mapped to EPrints] AD - Dipartimento di Chimica, Facoltà di Ingegneria, Univ. Studi 'La Sapienza' di Roma, Via del Castro Laurenziano, 00185 Roma, Italy [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: C. Neutron scattering, D. Crystal structure, D. Electrochemical properties, Cathodes, Doping (additives), Electrochemistry, Extraction, Lithium compounds, Molecular structure, Neutron diffraction, Positive ions, Divalent dopants, Jahn-Teller effect, Lithium batteries
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 21 Oct 2015 15:17 UTC
Last Modified: 29 May 2019 16:11 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51129 (The current URI for this page, for reference purposes)
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