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In situ Fe XAFS of reversible lithium insertion in a flexible metal organic framework material
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de Combarieu, Guillaume, Hamelet, Stephane, Millange, Franck, Morcrette, Mathieu, Tarascon, Jean-Marie, Ferey, Gerard and Walton, Richard I. (2009) In situ Fe XAFS of reversible lithium insertion in a flexible metal organic framework material. Electrochemistry Communications, Vol.11 (No.10). pp. 1881-1884. doi:10.1016/j.elecom.2009.08.008 ISSN 1388-2481.
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Official URL: http://dx.doi.org/10.1016/j.elecom.2009.08.008
Abstract
X-ray absorption fine structure (XAFS) analysis of the Fe K-edge during lithium insertion and extraction into the metal organic framework material MIL-53 (Fe-III(OH, F)bdc; bdc = benzene-1,4-dicarboxylate) reveals changes in local atomic environment about iron during the process. The average oxidation state of iron is reduced upon lithium insertion, as evidenced by the edge shift of the XANES spectra, and this is accompanied by a lengthening of Fe-O bonds, seen in the EXAFS. In contrast, the EXAFS analysis shows that the closest Fe-Fe distance remains approximately constant during the insertion and extraction of lithium, consistent with a distortion of the structure due to its flexible nature. The process is reversible upon lithium extraction, proving the redox-active flexibility of the framework.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Library of Congress Subject Headings (LCSH): | Iron, Extended X-ray absorption fine structure, X-ray absorption near edge structure, Lithium cells, Electrochemistry | ||||
Journal or Publication Title: | Electrochemistry Communications | ||||
Publisher: | Elsevier Inc. | ||||
ISSN: | 1388-2481 | ||||
Official Date: | October 2009 | ||||
Dates: |
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Volume: | Vol.11 | ||||
Number: | No.10 | ||||
Number of Pages: | 4 | ||||
Page Range: | pp. 1881-1884 | ||||
DOI: | 10.1016/j.elecom.2009.08.008 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
Data sourced from Thomson Reuters' Web of Knowledge
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