Electrochemistry Application — Why conductivity is not always king-physical properties governing the capacitance of 2D metal-organic framework-based EDLC supercapacitor electrodes: A Ni3(HITP)2case study

6 measurement groups · 17 results

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

Cyclic voltammetry in a three-electrode cell using Biologic SP 200 potentiostat.

Voltammetry

HITP_A neat-MOF electrode · Electrode

1 M KOH(aq), Ag/AgCl pseudo-reference, activated-carbon/carbon-black/PVDF counter electrode, voltage range -0.6 to -0.1 V vs Ag/AgCl, sweep rates 1 V s-1 to 1 mV s-1.

Geometry: 5 mg neat MOF pressed into Ni foam working electrode.
Context: Neat pristine MOF active material in electrode.
Measurement source: SI p.S2 · Electrode preparation · Fig. 2; Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
BET-normalised capacitance at 1 mV s^-1	8.4 uF cm^-2	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Specific capacitance at 1 mV s^-1	21.9 F g^-1	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Redox events in CV	No pronounced redox events	—	—	Text Qualitative	main p.3, article p.300 · Main text · Fig. 2a,b

Cyclic voltammetry in a three-electrode cell using Biologic SP 200 potentiostat.

Voltammetry

HITP_B neat-MOF electrode · Electrode

1 M KOH(aq), Ag/AgCl pseudo-reference, activated-carbon/carbon-black/PVDF counter electrode, voltage range -0.6 to -0.1 V vs Ag/AgCl, sweep rates 1 V s-1 to 1 mV s-1.

Geometry: 5 mg neat MOF pressed into Ni foam working electrode.
Context: Neat pristine MOF active material in electrode.
Measurement source: SI p.S2 · Electrode preparation · Fig. 2; Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
BET-normalised capacitance at 1 mV s^-1	12.2 uF cm^-2	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Specific capacitance at 1 mV s^-1Marked as a best value within this paper	100.8 F g^-1	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Low-rate capacitance saturation threshold	rates lower than 2 mV s^-1	—	—	Text Rounded Reported	main p.3, article p.300 · Main text · Fig. 2c

Cyclic voltammetry in a three-electrode cell using Biologic SP 200 potentiostat.

Voltammetry

HITP_C neat-MOF electrode · Electrode

1 M KOH(aq), Ag/AgCl pseudo-reference, activated-carbon/carbon-black/PVDF counter electrode, voltage range -0.6 to -0.1 V vs Ag/AgCl, sweep rates 1 V s-1 to 1 mV s-1.

Geometry: 5 mg neat MOF pressed into Ni foam working electrode.
Context: Neat pristine MOF active material in electrode.
Measurement source: SI p.S2 · Electrode preparation · Fig. 2; Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
BET-normalised capacitance at 1 mV s^-1Marked as a best value within this paper	12.7 uF cm^-2	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Specific capacitance at 1 mV s^-1	74.5 F g^-1	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2

Electrochemical impedance spectroscopy using Biologic SP 200 potentiostat and EC-Lab equivalent-circuit analysis.

Impedance spectroscopy

HITP_A neat-MOF electrode · Electrode

Initial open-circuit voltage, 1 MHz to 10 mHz, 10 mV sine wave, 1 M KOH(aq).

Geometry: Three-electrode cell with 5 mg neat MOF in Ni foam working electrode.
Context: Neat pristine MOF active material in electrode.
Measurement source: SI p.S2 · Electrode preparation · Fig. 2d; Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Equivalent distributed resistance (EDR)	69 ohm	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Equivalent series resistance (ESR)	1.6 ohm	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Charge-transfer resistance (RCT)	68 ohm	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2

Electrochemical impedance spectroscopy using Biologic SP 200 potentiostat and EC-Lab equivalent-circuit analysis.

Impedance spectroscopy

HITP_B neat-MOF electrode · Electrode

Initial open-circuit voltage, 1 MHz to 10 mHz, 10 mV sine wave, 1 M KOH(aq).

Geometry: Three-electrode cell with 5 mg neat MOF in Ni foam working electrode.
Context: Neat pristine MOF active material in electrode.
Measurement source: SI p.S2 · Electrode preparation · Fig. 2d; Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Equivalent distributed resistance (EDR)	15 ohm	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Equivalent series resistance (ESR)	1.6 ohm	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Charge-transfer resistance (RCT)Marked as a best value within this paper	9.9 ohm	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2

Electrochemical impedance spectroscopy using Biologic SP 200 potentiostat and EC-Lab equivalent-circuit analysis.

Impedance spectroscopy

HITP_C neat-MOF electrode · Electrode

Initial open-circuit voltage, 1 MHz to 10 mHz, 10 mV sine wave, 1 M KOH(aq).

Geometry: Three-electrode cell with 5 mg neat MOF in Ni foam working electrode.
Context: Neat pristine MOF active material in electrode.
Measurement source: SI p.S2 · Electrode preparation · Fig. 2d; Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Equivalent distributed resistance (EDR)Marked as a best value within this paper	14 ohm	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Equivalent series resistance (ESR)Marked as a best value within this paper	0.6 ohm	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2
Charge-transfer resistance (RCT)	10.4 ohm	—	—	Table Exact Reported	main p.4, article p.301 · Main text · Table 2