Title
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An oxysulfate electrode for sustainable Li-based batteries
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Author
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Abstract
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High-performing Fe-based electrodes for Li-based batteries are eagerly pursued because of the abundance and environmental benignity of iron, with especially great interest in polyanionic compounds because of their flexibility in tuning the Fe3+/Fe2+ redox potential. We report herein the synthesis and structure of a new Fe-based oxysulfate phase, Fe2O(SO4)(2), made at low temperature from abundant elements, which electrochemically reacts with nearly 1.6 Li atoms at an average voltage of 3.0 V versus Li+/Li, leading to a sustained reversible capacity of similar to 125 mAh/g. The Li insertiondeinsertion process, the first ever reported in any oxysulfate, entails complex phase transformations associated with the position of iron within the FeO6 octahedra. This finding opens a new path worth exploring in the quest for new positive electrode materials. |
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Language
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English
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Source (journal)
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Journal of the American Chemical Society. - Washington, D.C., 1879, currens
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Publication
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Washington, D.C.
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American Chemical Society
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2014
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ISSN
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0002-7863
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DOI
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10.1021/JA505268Y
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Volume/pages
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136
:36
(2014)
, p. 12658-12666
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ISI
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000341544600029
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Full text (Publisher's DOI)
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