Electrical Transport — Immobilization of N-(3-aminopropyl)-imidazole through MOFs in proton conductive membrane for elevated temperature anhydrous applications

3 measurement groups · 13 results

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

Four-probe AC impedance, Autolab PGSTAT 302, galvanostatic mode

Electrical conductivity Impedance spectroscopy Galvanostatic cycling

6% encapsulated MOFs membrane · Thin Film

a.c. current amplitude 0.1 mA; frequency range 1 MHz to 50 Hz; heating/cooling 1-2 deg C/min from ambient to 160 deg C and back in air

Temperature: 298-433
Atmosphere: air; RH 25% at 25 deg C and RH 0.15% at 160 deg C for reported endpoints
Geometry: four-probe membrane conductivity; kappa=L/(R W d)
Context: target composite membrane with 6% encapsulated MOFs
Measurement source: p003 · 2.2.5 Conductivity measurements · Eq. 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
second heating-cooling cycle reproducibility	second cycle shows similar trend; cooling lines almost coincided	—	—	Text Qualitative	p005 · SI 8 · Fig. S6
prepared membrane thickness range	90-100 um	—	—	Text Range	p002 · 2.2.3 Preparation of PEMs
proton conductivity at 160 deg C and RH 0.15%Marked as a best value within this paper	4 x 10^-2 S/cm	—	—	Text Rounded Reported	p007 · 3.7 Proton conductivity and mechanism · Fig. 10a
proton conductivity at 25 deg C and RH 25%	2.5 x 10^-4 S/cm	—	—	Text Rounded Reported	p007 · 3.7 Proton conductivity and mechanism · Fig. 10a
conclusion proton conductivity at 160 deg C	0.04 S/cm	—	—	Text Rounded Reported	p009 · 4. Conclusion

Four-probe AC impedance, same conductivity protocol

Electrical conductivity Impedance spectroscopy

PBI membrane · Thin Film

PBI membrane conductivity compared with 6% encapsulated-MOF membrane at investigated temperatures

Temperature: 298-433
Atmosphere: air
Geometry: membrane conductivity
Context: non-MOF polymer comparator
Measurement source: p008 · 3.7 Proton conductivity and mechanism · Fig. 10b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
target membrane versus PBI conductivity	target 6% encapsulated-MOF membrane has higher conductivity than PBI at investigated temperatures	—	—	Text Qualitative	p008 · 3.7 Proton conductivity and mechanism · Fig. 10b

Four-probe AC impedance, ratio-series conductivity at 160 deg C

Electrical conductivity Impedance spectroscopy

membranes with MOFs:encapsulated MOFs ratio series · Thin Film

Membranes with total MOF loading 6% and varied ratios of MOFs to encapsulated MOFs; conductivity read from Fig. 11 at 160 deg C

Temperature: 433
Atmosphere: air; nominal high-temperature anhydrous/very low humidity
Geometry: membrane conductivity
Context: composition-ratio series
Measurement source: p008 · 3.7 Proton conductivity and mechanism · Fig. 11

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
estimated conductivity at MOFs:encapsulated-MOFs ratio 0:6	log10(sigma/S cm^-1) approximately -5.2; sigma approximately 6.3e-06 S/cm	—	—	Figure Axis Approximate	p008 · 3.7 Proton conductivity and mechanism · Fig. 11
estimated conductivity at MOFs:encapsulated-MOFs ratio 1:5	log10(sigma/S cm^-1) approximately -3.9; sigma approximately 0.00013 S/cm	—	—	Figure Axis Approximate	p008 · 3.7 Proton conductivity and mechanism · Fig. 11
estimated conductivity at MOFs:encapsulated-MOFs ratio 2:4	log10(sigma/S cm^-1) approximately -3.1; sigma approximately 0.00079 S/cm	—	—	Figure Axis Approximate	p008 · 3.7 Proton conductivity and mechanism · Fig. 11
estimated conductivity at MOFs:encapsulated-MOFs ratio 3:3	log10(sigma/S cm^-1) approximately -2.6; sigma approximately 0.0025 S/cm	—	—	Figure Axis Approximate	p008 · 3.7 Proton conductivity and mechanism · Fig. 11
estimated conductivity at MOFs:encapsulated-MOFs ratio 4:2	log10(sigma/S cm^-1) approximately -2.1; sigma approximately 0.0079 S/cm	—	—	Figure Axis Approximate	p008 · 3.7 Proton conductivity and mechanism · Fig. 11
estimated conductivity at MOFs:encapsulated-MOFs ratio 5:1	log10(sigma/S cm^-1) approximately -1.8; sigma approximately 0.016 S/cm	—	—	Figure Axis Approximate	p008 · 3.7 Proton conductivity and mechanism · Fig. 11
estimated conductivity at MOFs:encapsulated-MOFs ratio 6:0	log10(sigma/S cm^-1) approximately -1.4; sigma approximately 0.04 S/cm	—	—	Figure Axis Approximate	p008 · 3.7 Proton conductivity and mechanism · Fig. 11