Electrical Transport — Rational designs for highly proton-conductive metal-organic frameworks

3 measurement groups · 12 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

AC impedance spectroscopy / Nyquist analysis

Impedance spectroscopy

Compacted pellet of powdered compound 1 under 98% RH · Pellet

Compacted powder pellet with gold electrodes; measured under 98% relative humidity at 25, 28, 31 and 34 C.

Temperature: 298-307
Atmosphere: 98% RH
Geometry: powder pellet with two gold electrodes attached to both ends and four end terminals (quasi-four-probe method)
Context: pristine target MOF
Measurement source: S3 · Ac impedance measurements · Figure S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Figure S2 Nyquist high-Z real-axis intercept at 25 C	about 150 ohm	—	visual estimate from rendered Nyquist plot	Visual Estimate Uncertain	S3 · Figure S2 · Figure S2
Figure S2 Nyquist high-Z real-axis intercept at 28 C	about 122 ohm	—	visual estimate from rendered Nyquist plot	Visual Estimate Uncertain	S3 · Figure S2 · Figure S2
Figure S2 Nyquist high-Z real-axis intercept at 31 C	about 98 ohm	—	visual estimate from rendered Nyquist plot	Visual Estimate Uncertain	S3 · Figure S2 · Figure S2
Figure S2 Nyquist high-Z real-axis intercept at 34 C	about 73 ohm	—	visual estimate from rendered Nyquist plot	Visual Estimate Uncertain	S3 · Figure S2 · Figure S2
proton conductivity of compound 1 at 25 C and 98% RHMarked as a best value within this paper	8 x 10-3 S cm-1 at 25 C under 98% RH	0.8 S m-1	—	Text Rounded Reported	2 · proton conductivity discussion · Figure S2
ambient-temperature superprotonic conductivity order of magnitude	10-2 S cm-1 at ambient temperature	1 S m-1	order-of-magnitude summary	Text Approximate	2 · summary

proton conductivity by impedance after humidity-induced dehydration

Electrical conductivity

Dihydrate form of compound 1 under 70% RH · Pellet

Dihydrate state measured at 70% RH; temperature not explicitly stated for this conductivity value, likely ambient because discussed with the 25 C value.

Atmosphere: 70% RH
Geometry: not explicitly restated; inferred compacted pellet impedance geometry
Context: lower-hydration target MOF comparison
Measurement source: 2 · proton conductivity discussion

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
proton conductivity of dihydrate at 70% RH	6 x 10-6 S cm-1 at 70% RH	0.0006 S m-1	—	Text Rounded Reported	2 · proton conductivity discussion

temperature-dependent proton conductivity from AC impedance; Arrhenius analysis

Electrical conductivity Impedance spectroscopy

Compacted pellet of powdered compound 1 under 98% RH · Pellet

Proton conductivity measured under 98% RH; Arrhenius plot of log(sigma T) versus 1000/T.

Temperature: 298-307
Atmosphere: 98% RH
Geometry: compacted powder pellet with gold electrodes
Context: pristine target MOF
Measurement source: 2 · proton conductivity discussion · Figure 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
activation energy for proton conductivityMarked as a best value within this paper	Ea = 0.63 eV	—	—	Text Rounded Reported	2 · proton conductivity discussion · Figure 2
Figure 2 log(sigma T) point at 25 C	about 0.38 on log(sigma T / S cm-1 K) axis at 1000/T about 3.35 K-1	—	visual estimate from rendered figure	Figure Axis Approximate	2 · Figure 2 · Figure 2
estimated proton conductivity at 28 C and 98% RH from Figure 2	about 1.0 x 10-2 S cm-1	1 S m-1	visual estimate from Arrhenius plot; derived from log(sigma T) about 0.48 at 301 K	Figure Axis Approximate	2 · Figure 2 · Figure 2
estimated proton conductivity at 31 C and 98% RH from Figure 2	about 1.3 x 10-2 S cm-1	1.3 S m-1	visual estimate from Arrhenius plot; derived from log(sigma T) about 0.59 at 304 K	Figure Axis Approximate	2 · Figure 2 · Figure 2
estimated proton conductivity at 34 C and 98% RH from Figure 2	about 1.6 x 10-2 S cm-1	1.6 S m-1	visual estimate from Arrhenius plot; derived from log(sigma T) about 0.70 at 307 K	Figure Axis Approximate	2 · Figure 2 · Figure 2