Single-Ion Li+, Na+, and Mg2+ Solid Electrolytes Supported by a Mesoporous Anionic Cu-Azolate Metal-Organic Framework

Sarah S. Park, Yuri Tulchinsky, Mircea Dinca*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

231 Scopus citations

Abstract

A novel Cu(II)-azolate metal-organic framework (MOF) with tubular pores undergoes a reversible single crystal to single crystal transition between neutral and anionic phases upon reaction with stoichiometric amounts of halide or pseudohalide salts. The stoichiometric transformation between the two phases allows loading of record amounts of charge-balancing Li+, Na+, and Mg2+ ions for MOFs. Whereas the halide/pseudohalide anions are bound to the metal centers and thus stationary, the cations move freely within the one-dimensional pores, giving rise to single-ion solid electrolytes. The respective Li+-, Na+-, and Mg2+-loaded materials exhibit high ionic conductivity values of 4.4 × 10-5, 1.8 × 10-5, and 8.8 × 10-7 S/cm. With addition of LiBF4, the Li+ conductivity improves to 4.8 × 10-4 S/cm. These are the highest values yet observed for MOF solid electrolytes.

Original languageAmerican English
Pages (from-to)13260-13263
Number of pages4
JournalJournal of the American Chemical Society
Volume139
Issue number38
DOIs
StatePublished - 27 Sep 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017 American Chemical Society.

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