Electrochemical and structural study of the 3.3 V reduction step in defective LixMn2O4 and LiMn2O(4-y)Py compounds

M. R. Palacín, G. G. Amatucci, M. Anne, Y. Chabre, L. Seguin, P. Strobel, J. M. Tarascon, G. Vaughan

Research output: Contribution to journalConference article

21 Citations (Scopus)

Abstract

Non-stoichiometric or fluorine-substituted LixMn2O4 are known to present a reversible redox step at 4.5 V as well as a reduction step at 3.3 V appearing to the expense of the usual 4.0-4.15 V. We present results of very slow stepwise potentiodynamic studies which allowed to localise the oxidation step associated to the 3.3 V reduction level close to 3.95 V. We propose the cubic spinel lattice parameter value as the key parameter for knowing a priori if these redox states will be present or not, with 8.215 Å as threshold value. In situ XRD studies performed across the 3.3 ↔ 3.95 V redox step indicate that these additional states are probably associated to structural features.

Original languageEnglish (US)
Pages (from-to)627-631
Number of pages5
JournalJournal of Power Sources
Volume81-82
DOIs
StatePublished - Sep 1999
Externally publishedYes
EventProceedings of the 1998 Ninth International Meeting on Lithium Batteries - Edingburgh, United Kingdom
Duration: Jul 12 1998Jul 17 1998

Fingerprint

Fluorine
Lattice constants
spinel
fluorine
lattice parameters
Oxidation
oxidation
thresholds
Oxidation-Reduction
spinell

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Keywords

  • Electrochemical potential spectroscopy
  • In situ XRD
  • LiMnO
  • LiMnOF

Cite this

Palacín, M. R. ; Amatucci, G. G. ; Anne, M. ; Chabre, Y. ; Seguin, L. ; Strobel, P. ; Tarascon, J. M. ; Vaughan, G. / Electrochemical and structural study of the 3.3 V reduction step in defective LixMn2O4 and LiMn2O(4-y)Py compounds. In: Journal of Power Sources. 1999 ; Vol. 81-82. pp. 627-631.
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abstract = "Non-stoichiometric or fluorine-substituted LixMn2O4 are known to present a reversible redox step at 4.5 V as well as a reduction step at 3.3 V appearing to the expense of the usual 4.0-4.15 V. We present results of very slow stepwise potentiodynamic studies which allowed to localise the oxidation step associated to the 3.3 V reduction level close to 3.95 V. We propose the cubic spinel lattice parameter value as the key parameter for knowing a priori if these redox states will be present or not, with 8.215 {\AA} as threshold value. In situ XRD studies performed across the 3.3 ↔ 3.95 V redox step indicate that these additional states are probably associated to structural features.",
keywords = "Electrochemical potential spectroscopy, In situ XRD, LiMnO, LiMnOF",
author = "Palac{\'i}n, {M. R.} and Amatucci, {G. G.} and M. Anne and Y. Chabre and L. Seguin and P. Strobel and Tarascon, {J. M.} and G. Vaughan",
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Electrochemical and structural study of the 3.3 V reduction step in defective LixMn2O4 and LiMn2O(4-y)Py compounds. / Palacín, M. R.; Amatucci, G. G.; Anne, M.; Chabre, Y.; Seguin, L.; Strobel, P.; Tarascon, J. M.; Vaughan, G.

In: Journal of Power Sources, Vol. 81-82, 09.1999, p. 627-631.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Electrochemical and structural study of the 3.3 V reduction step in defective LixMn2O4 and LiMn2O(4-y)Py compounds

AU - Palacín, M. R.

AU - Amatucci, G. G.

AU - Anne, M.

AU - Chabre, Y.

AU - Seguin, L.

AU - Strobel, P.

AU - Tarascon, J. M.

AU - Vaughan, G.

PY - 1999/9

Y1 - 1999/9

N2 - Non-stoichiometric or fluorine-substituted LixMn2O4 are known to present a reversible redox step at 4.5 V as well as a reduction step at 3.3 V appearing to the expense of the usual 4.0-4.15 V. We present results of very slow stepwise potentiodynamic studies which allowed to localise the oxidation step associated to the 3.3 V reduction level close to 3.95 V. We propose the cubic spinel lattice parameter value as the key parameter for knowing a priori if these redox states will be present or not, with 8.215 Å as threshold value. In situ XRD studies performed across the 3.3 ↔ 3.95 V redox step indicate that these additional states are probably associated to structural features.

AB - Non-stoichiometric or fluorine-substituted LixMn2O4 are known to present a reversible redox step at 4.5 V as well as a reduction step at 3.3 V appearing to the expense of the usual 4.0-4.15 V. We present results of very slow stepwise potentiodynamic studies which allowed to localise the oxidation step associated to the 3.3 V reduction level close to 3.95 V. We propose the cubic spinel lattice parameter value as the key parameter for knowing a priori if these redox states will be present or not, with 8.215 Å as threshold value. In situ XRD studies performed across the 3.3 ↔ 3.95 V redox step indicate that these additional states are probably associated to structural features.

KW - Electrochemical potential spectroscopy

KW - In situ XRD

KW - LiMnO

KW - LiMnOF

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U2 - 10.1016/S0378-7753(99)00233-5

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