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Eutectic CsHSO4-Coordination Polymer Glasses with Superprotonic Conductivity
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DOI：10.1021/jacs.2c08624.png)
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Abstract
En 中文
Superprotonic phase transition in CsHSO4 allows fast protonic conduction, but only at temperatures above the transition temperature of 141 degrees C (Tc). Here, we preserve the superprotonic conductivity of CsHSO4 by forming a binary CsHSO4-coordination polymer glass system, showing eutectic melting. Their anhydrous proton conductivities below Tc are at least 3 orders of magnitude higher than CsHSO4 without compromising conductivity at higher temperatures or the need for humidification, reaching 6.3 mS cm-1 at 180 degrees C. The glass also introduces processability to the conductor, as its viscosity below 103 Pa center dot s can be achieved at 65 degrees C. Solid-state NMR and X-ray pair distribution functions reveal the oxyanion exchanges and the origin of the preserved conductivity. Finally, we demonstrate the preparation of a micrometer-scale thin-film proton conductor showing low resistivity with high transparency (transmittance >85% between 380-800 nm).
Keywords:
METAL-ORGANIC FRAMEWORK
PROTIC IONIC LIQUIDS
PHASE-TRANSITIONS
CHEMICAL-SHIFTS
RAMAN-SPECTRA
CSHSO4
CRYSTALLINE
ELECTROLYTE
RELAXATION
DEPENDENCE
Journal
IF:
15.6
Papers:
20.0W
Citations:
60.2W