Electrical Transport — Lithium Ion Diffusion in a Metal-Organic Framework Mediated by an Ionic Liquid

10 measurement groups · 18 results

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

AC impedance, quasi-four-probe method

Electrical conductivity Impedance spectroscopy

ELT-bulk · Unknown

Solartron 1260 impedance/gain-phase analyser and 1296 dielectric interface; 1 Hz to 1 MHz; liquid in Kapton washer between stainless steel electrodes; cooled below 210 K then measured stepwise during heating.

Temperature: below 210 K to above 350 K
Geometry: Kapton washer approximately 0.1 mm thick x 3.1 mm inner diameter; stainless steel electrodes
Context: bulk lithium-doped ionic liquid control
Measurement source: 2 · Experimental Section

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ELT-bulk conductivity inflection temperature	around 248 K	—	—	Text Approximate	4 · Results and Discussion · Figure 8
ELT-bulk log ionic conductivity near 300 K	visual estimate from Figure 8 at ca. 300 K: log10(sigma / S cm-1) approximately -3.2	0.00063 S cm^-1	approximately +/-0.3 log units	Figure Axis Approximate	4 · Results and Discussion · Figure 8

AC impedance, quasi-four-probe method

Electrical conductivity Impedance spectroscopy

ELT@Z100 · Pellet

Powder pressed into pellet with carbon sheet electrodes on both faces; 1 Hz to 1 MHz; cooled below 210 K then measured stepwise during heating.

Temperature: below 210 K to above 350 K
Geometry: pellet approximately 0.5 mm thick x 3.0 mm diameter; carbon sheet electrodes
Context: guest-loaded ZIF-8
Measurement source: 2 · Experimental Section

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Bulk IL vs 100% occupied IL@ZIF-8 conductivity	ET-bulk and ELT-bulk are 2 orders of magnitude higher than ET@Z100 and ELT@Z100	—	—	Text Approximate	5 · Results and Discussion · Figure 8
ELT@Z100 log ionic conductivity near 300 K	visual estimate from Figure 8 at ca. 300 K: log10(sigma / S cm-1) approximately -5.7	0.000002 S cm^-1	approximately +/-0.3 log units	Figure Axis Approximate	4 · Results and Discussion · Figure 8
Effect of LiTFSA addition on IL@ZIF-8 conductivity	ELT@Z100 and ELT@Z75 showed lower conductivities and larger inclinations than ET@Z100 and ET@Z75	—	—	Text Qualitative	4 · Results and Discussion · Figure 8
ELT@Z100 conductivity low-temperature drop	No marked decrease was detected even at low temperature	—	—	Text Qualitative	4 · Results and Discussion · Figure 8
100% occupancy vs 75% occupancy conductivityMarked as a best value within this paper	ET@Z100 and ELT@Z100 are 2 orders of magnitude higher than ET@Z75 and ELT@Z75	—	—	Text Approximate	5 · Results and Discussion · Figure 8

AC impedance, quasi-four-probe method

Electrical conductivity Impedance spectroscopy

ELT@Z75 · Pellet

Powder pressed into pellet with carbon sheet electrodes on both faces; 1 Hz to 1 MHz; cooled below 210 K then measured stepwise during heating.

Temperature: below 210 K to above 350 K
Geometry: pellet approximately 0.5 mm thick x 3.0 mm diameter; carbon sheet electrodes
Context: guest-loaded ZIF-8
Measurement source: 2 · Experimental Section

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ELT@Z75 log ionic conductivity near 300 K	visual estimate from Figure 8 at ca. 300 K: log10(sigma / S cm-1) approximately -8.2	6.3e-9 S cm^-1	approximately +/-0.4 log units	Figure Axis Approximate	4 · Results and Discussion · Figure 8

AC impedance, quasi-four-probe method

Electrical conductivity Impedance spectroscopy

ET-bulk · Unknown

Temperature: below 210 K to above 350 K
Geometry: Kapton washer approximately 0.1 mm thick x 3.1 mm inner diameter; stainless steel electrodes
Context: bulk ionic liquid control
Measurement source: 2 · Experimental Section

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ET-bulk conductivity inflection temperature	around 265 K	—	—	Text Approximate	4 · Results and Discussion · Figure 8

AC impedance, quasi-four-probe method

Electrical conductivity Impedance spectroscopy

ET@Z100 · Pellet

Powder pressed into pellet with carbon sheet electrodes on both faces; 1 Hz to 1 MHz; cooled below 210 K then measured stepwise during heating.

Temperature: below 210 K to above 350 K
Geometry: pellet approximately 0.5 mm thick x 3.0 mm diameter; carbon sheet electrodes
Context: guest-loaded ZIF-8
Measurement source: 2 · Experimental Section

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ET@Z100 log ionic conductivity near 300 K	visual estimate from Figure 8 at ca. 300 K: log10(sigma / S cm-1) approximately -4.9	0.000013 S cm^-1	approximately +/-0.3 log units	Figure Axis Approximate	4 · Results and Discussion · Figure 8

AC impedance, quasi-four-probe method

Electrical conductivity Impedance spectroscopy

ET@Z75 · Pellet

Powder pressed into pellet with carbon sheet electrodes on both faces; 1 Hz to 1 MHz; cooled below 210 K then measured stepwise during heating.

Temperature: below 210 K to above 350 K
Geometry: pellet approximately 0.5 mm thick x 3.0 mm diameter; carbon sheet electrodes
Context: guest-loaded ZIF-8
Measurement source: 2 · Experimental Section

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source

Nyquist impedance plots from AC impedance measurements

Impedance spectroscopy

ELT@Z100 · Pellet

SI Figure S7 gives ELT@Z100 Nyquist plots during heating at 241, 268, 295, and 343 K.

Temperature: 241, 268, 295, 343
Geometry: pellet approximately 0.5 mm thick x 3.0 mm diameter; carbon sheet electrodes
Context: guest-loaded ZIF-8
Measurement source: S6 · Supporting Information · Figure S7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ELT@Z100 Nyquist plot temperatures	241, 268, 295, and 343 K	—	—	Caption Exact Reported	S6 · Supporting Information · Figure S7

Nyquist impedance plots from AC impedance measurements

Impedance spectroscopy

ELT@Z75 · Pellet

SI Figure S6 gives ELT@Z75 Nyquist plots during heating at 282, 296, 309, and 344 K.

Temperature: 282, 296, 309, 344
Geometry: pellet approximately 0.5 mm thick x 3.0 mm diameter; carbon sheet electrodes
Context: guest-loaded ZIF-8
Measurement source: S5 · Supporting Information · Figure S6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ELT@Z75 Nyquist plot temperatures	282, 296, 309, and 344 K	—	—	Caption Exact Reported	S5 · Supporting Information · Figure S6

7Li pulsed-field gradient NMR (PFG-NMR) diffusion measurement

Nuclear magnetic resonance

ELT-bulk · Unknown

7Li at 155.5 MHz using Bruker Diff 50 probe; hermetically sealed glass tubes; stimulated-echo pulse sequence; g = 0 to 2500 G cm^-1, Delta = 40 ms, delta = 1 ms.

Temperature: approximately 400
Atmosphere: sealed glass tube
Context: bulk lithium-doped ionic liquid control
Measurement source: 2 · Experimental Section

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Activation energy for lithium self-diffusion in ELT-bulk	18.6 kJ mol-1	—	—	Text Exact Reported	5 · Results and Discussion · Figure 10
ELT-bulk log lithium self-diffusion coefficient near 400 K	visual estimate from Figure 10 near 400 K: log10(DLi / m2 s-1) approximately -9.75	1.8e-10 m^2 s^-1	approximately +/-0.2 log units	Figure Axis Approximate	5 · Results and Discussion · Figure 10

7Li pulsed-field gradient NMR (PFG-NMR) diffusion measurement

Nuclear magnetic resonance

ELT@Z100 · Pellet

7Li at 155.5 MHz using Bruker Diff 50 probe; hermetically sealed glass tubes; stimulated-echo pulse sequence; g = 0 to 2500 G cm^-1, Delta = 40 ms, delta = 1 ms.

Temperature: approximately 403
Atmosphere: sealed glass tube
Context: guest-loaded ZIF-8
Measurement source: 2 · Experimental Section

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ELT@Z100 lithium self-diffusion coefficient relative to bulk	DLi of ELT@Z100 was 2 orders of magnitude lower than ELT-bulk	—	—	Text Approximate	5 · Results and Discussion · Figure 10
Activation energy for lithium self-diffusion in ELT@Z100Marked as a best value within this paper	15.7 kJ mol-1	—	—	Text Exact Reported	5 · Results and Discussion · Figure 10
ELT@Z100 log lithium self-diffusion coefficient near 403 K	visual estimate from Figure 10 near 403 K: log10(DLi / m2 s-1) approximately -11.35	4.5e-12 m^2 s^-1	approximately +/-0.2 log units	Figure Axis Approximate	5 · Results and Discussion · Figure 10
PFG-NMR signal dependence	stimulated-echo signal decreased with PFG magnitude, conforming to the Stejskal-Tanner equation in both ELT-bulk and ELT@Z100	—	—	Text Qualitative	5 · Results and Discussion · Figure 9