Robust ionic liquid@MOF composite as a versatile superprotonic conductor

Kiran Taksande; Effrosyni Gkaniatsou; Corine Simonnet-Jégat; Carine Livage; Guillaume Maurin; Nathalie Steunou; Sabine Devautour-Vinot

doi:10.1039/d1dt02877d

Robust ionic liquid@MOF composite as a versatile superprotonic conductor

Dalton Trans. 2021 Nov 9;50(43):15914-15923. doi: 10.1039/d1dt02877d.

Authors

Kiran Taksande^{1

2}, Effrosyni Gkaniatsou³, Corine Simonnet-Jégat³, Carine Livage³, Guillaume Maurin¹, Nathalie Steunou³, Sabine Devautour-Vinot¹

Affiliations

¹ ICGM, University of Montpellier, CNRS, ENSCM, Montpellier, France. sabine.devautour-vinot@umontpellier.fr.
² Government of Maharashtra's, Ismail Yusuf College, Jogeshwari(E), Mumbai, Maharashtra 411060, India.
³ Institut Lavoisier de Versailles UMR CNRS 8180, Université de Versailles St Quentin en Yvelines, Université Paris Saclay, Versailles, France.

PMID: 34723313
DOI: 10.1039/d1dt02877d

Abstract

A highly performing proton conducting composite was prepared through the impregnation of EMIMCl ionic liquid in the mesoporous MIL-101(Cr)-SO₃H MOF. The resulting EMIMCl@MIL-101(Cr)-SO₃H composite displays high thermal and chemical stability, alongside retention of a high amount of EMIMCl even at temperatures as high as 500 K, as well as under moisture conditions. Remarkably, this composite exhibits outstanding proton conductivity not only at the anhydrous state (σ_{473 K} = 1.5 × 10^-3 S cm^-S) but also under humidity (σ_{(343 K/60%-80%RH)} ≥ 0.10 S cm^-1) conditions. This makes EMIMCl@MIL-101(Cr)-SO₃H a unique candidate to act as a solid state proton conductor for PEMFC applications under versatile conditions.