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Published on: November 11, 2013
A Fe-thiolate layered metal organic framework as a high-performance electrode material for potassium-ion batteries
Long H B Nguyen1,2, Pablo Salcedo-Abraira3, Dat Le Thanh1,4
1ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France. lorenzo.stievano@umontpellier.fr.
None:
Here, we report a rare example of an Fe-based MOF capable of accommodating K+ ions electrochemically within its layered framework, achieving low polarization, high capacity utilization (∼0.8 electrons exchanged per Fe), and stable cycling performance. In situ Mössbauer spectroscopy and operando XRD analyses revealed that the observed electrochemical storage arises from the Fe3+/Fe2+ redox couple with polyphasic transformations.
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