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Structural and Electrochemical Diversity in LiFe 1− δ Zn δ SO 4 F Solid Solution: A Fe‐Based 3.9 V Positive‐Electrode Material
Author(s) -
Ati Mohammed,
Melot Brent C.,
Rousse Gwenaëlle,
Chotard JeanNoël,
Barpanda Prabeer,
Tarascon JeanMarie
Publication year - 2011
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201104648
Subject(s) - electrochemistry , transition metal , crystallography , redox , content (measure theory) , materials science , electrode , chemistry , inorganic chemistry , mathematics , catalysis , mathematical analysis , biochemistry
Transition‐metal fluorosulfates are currently under intense investigation for their use as anodes in Li‐ion batteries. The substitution of Zn into LiFeSO 4 F has been found to trigger a transition from the tavorite structure to two separate polymorphs which crystallize in the sillimanite and triplite structures (see picture). These new phases show Fe 2+ /Fe 3+ redox potentials of 3.6 and 3.9 V versus Li, respectively.