Electrochemistry Application — Synthesis of a novel double-ligand nickel conductive metal–organic framework material and its electrochemical characterization for supercapacitors

11 measurement groups · 33 results

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

activated carbon cyclic voltammetry

Voltammetry

activated carbon control electrode · Electrode

Commercial AC control electrode CV in approximately -1.0 to 0.0 V window at scan rates labelled 10, 20, 40, 60 and 100 mV s-1 in Fig. S3b.

Geometry: electrochemical control electrode; full cell details not stated in SI caption
Context: activated carbon negative-electrode component/control
Measurement source: 2 · Fig. S3 · Figure S3b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
AC CV voltage window	approximately -1.0 to 0.0 V	—	visual axis read	Figure Axis Approximate	2 · Fig. S3 · Figure S3b

activated carbon electrochemical impedance spectroscopy

Impedance spectroscopy

activated carbon control electrode · Electrode

Commercial AC control Nyquist/EIS plot in Fig. S3d.

Geometry: electrochemical control electrode; full cell details not stated in SI caption
Context: activated carbon negative-electrode component/control
Measurement source: 2 · Fig. S3 · Figure S3d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
AC EIS high-frequency intercept	approximately 0.95 ohm	—	visual estimate	Figure Axis Approximate	2 · Fig. S3 · Figure S3d

activated carbon galvanostatic charge-discharge and capacitance plot

Galvanostatic cycling

activated carbon control electrode · Electrode

Commercial AC control GCD curves and specific capacitance versus current density; current densities labelled 1, 2, 3, 5, 8 and 10 A g-1 in Fig. S3a,c.

Geometry: electrochemical control electrode; full cell details not stated in SI caption
Context: activated carbon negative-electrode component/control
Measurement source: 2 · Fig. S3 · Figure S3a,c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
AC specific capacitance at 10 A g-1	approximately 205 F g-1 at 10 A g-1	—	visual estimate	Figure Axis Approximate	2 · Fig. S3 · Figure S3c
AC specific capacitance at 1 A g-1Marked as a best value within this paper	approximately 270 F g-1 at 1 A g-1	—	visual estimate	Figure Axis Approximate	2 · Fig. S3 · Figure S3c
AC specific capacitance at 2 A g-1	approximately 240 F g-1 at 2 A g-1	—	visual estimate	Figure Axis Approximate	2 · Fig. S3 · Figure S3c
AC specific capacitance at 3 A g-1	approximately 230 F g-1 at 3 A g-1	—	visual estimate	Figure Axis Approximate	2 · Fig. S3 · Figure S3c
AC specific capacitance at 5 A g-1	approximately 218 F g-1 at 5 A g-1	—	visual estimate	Figure Axis Approximate	2 · Fig. S3 · Figure S3c
AC specific capacitance at 8 A g-1	approximately 209 F g-1 at 8 A g-1	—	visual estimate	Figure Axis Approximate	2 · Fig. S3 · Figure S3c

ASC cyclic voltammetry

Voltammetry

Ni-MOF//AC ASC device · Electrode

Ni-MOF//AC ASC tested across voltage windows 0-1.1 to 0-1.6 V and at scan rates 10, 30, 50, 80 and 100 mV s-1.

Geometry: asymmetric supercapacitor; Ni-MOF positive and AC negative
Context: Ni-MOF//AC composite device
Measurement source: 7-9 · Electrochemical characterization · Figure 5a,b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ASC CV energy-storage behaviour	mixed energy storage behavior with Faradaic and double-layer charging behavior	—	—	Text Qualitative	7 · Electrochemical characterization · Figure 5b
optimum working voltageMarked as a best value within this paper	1.5 V	—	—	Text Exact Reported	7 · Electrochemical characterization · Figure 5a

ASC cycling stability

Ni-MOF//AC ASC device · Electrode

Ni-MOF//AC ASC cycled for 4000 continuous GCD cycles at 5 A g-1.

Geometry: asymmetric supercapacitor
Context: Ni-MOF//AC composite device
Measurement source: 8-9 · Electrochemical characterization · Figure 5g

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ASC cycle count	4000 continuous GCD cycles at 5 A g-1	—	—	Text Exact Reported	9 · Electrochemical characterization · Figure 5g
ASC capacity retention after 4000 cycles	still quite high; approximately 100% from Figure 5g	—	visual estimate	Visual Estimate Approximate	8-9 · Electrochemical characterization · Figure 5g

ASC electrochemical impedance spectroscopy

Impedance spectroscopy

Ni-MOF//AC ASC device · Electrode

Nyquist/EIS spectrum of Ni-MOF//AC ASC; equivalent series resistance read from x-axis intercept.

Geometry: asymmetric supercapacitor
Context: Ni-MOF//AC composite device
Measurement source: 8-9 · Electrochemical characterization · Figure 5f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
equivalent series resistance	about 0.95 ohm	—	about	Text Approximate	9 · Electrochemical characterization · Figure 5f

ASC galvanostatic charge-discharge

Galvanostatic cycling

Ni-MOF//AC ASC device · Electrode

Ni-MOF//AC ASC GCD at 0.3, 0.5, 0.7, 1, 3, 5 and 7 A g-1 within 0-1.5 V window.

Geometry: asymmetric supercapacitor; positive:negative mass ratio 2:1
Context: Ni-MOF//AC composite device
Measurement source: 7-9 · Electrochemical characterization · Figure 5c-e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ASC specific capacitance at 0.3 A g-1Marked as a best value within this paper	approximately 98 F g-1 from Figure 5d	—	visual estimate	Figure Axis Approximate	8 · Electrochemical characterization · Figure 5d
ASC specific capacitance at 0.5 A g-1	approximately 75 F g-1 from Figure 5d	—	visual estimate	Figure Axis Approximate	8 · Electrochemical characterization · Figure 5d
ASC specific capacitance at 0.7 A g-1	approximately 68 F g-1 from Figure 5d	—	visual estimate	Figure Axis Approximate	8 · Electrochemical characterization · Figure 5d
ASC specific capacitance at 1 A g-1	approximately 63 F g-1 from Figure 5d	—	visual estimate	Figure Axis Approximate	8 · Electrochemical characterization · Figure 5d
ASC specific capacitance at 3 A g-1	approximately 52 F g-1 from Figure 5d	—	visual estimate	Figure Axis Approximate	8 · Electrochemical characterization · Figure 5d
ASC specific capacitance at 5 A g-1	approximately 47 F g-1 from Figure 5d	—	visual estimate	Figure Axis Approximate	8 · Electrochemical characterization · Figure 5d
ASC specific capacitance at 7 A g-1	approximately 43 F g-1 from Figure 5d	—	visual estimate	Figure Axis Approximate	8 · Electrochemical characterization · Figure 5d
ASC energy density at 0.3 A g-1Marked as a best value within this paper	30.7 Wh kg-1	—	—	Text Exact Reported	1,7 · Abstract / Electrochemical characterization · Figure 5e
ASC energy density at 7 A g-1	13.6 Wh kg-1	—	—	Text Exact Reported	7 · Electrochemical characterization · Figure 5e
positive:negative electrode mass ratio	m+:m- = 2:1	—	—	Text Exact Reported	7 · Electrochemical characterization
ASC power density at 0.3 A g-1Marked as a best value within this paper	225 W kg-1	—	—	Text Exact Reported	1,7 · Abstract / Electrochemical characterization · Figure 5e

cyclic voltammetry in three-electrode system

Voltammetry

Ni-MOF working electrode on nickel foam · Electrode

Ni-MOF working electrode, activated carbon counter electrode, Hg/HgO reference, 3 M KOH electrolyte, potential range 0-0.5 V; scan rates 10, 30, 50, 80 and 100 mV s-1 from Figure 4a.

Geometry: three-electrode cell; about 1 cm2 geometric electrode area
Context: Ni-MOF composite working electrode
Measurement source: 3,5-7 · Electrochemical measurements / Electrochemical characterization · Figure 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CV redox behaviour	obvious redox peaks; typical pseudo-capacitative behavior	—	—	Text Qualitative	5-6 · Electrochemical characterization · Figure 4a

galvanostatic cycling stability

Galvanostatic cycling

Ni-MOF working electrode on nickel foam · Electrode

Ni-MOF working electrode cycled 4000 times at 7 A g-1.

Geometry: three-electrode cell
Context: Ni-MOF composite working electrode
Measurement source: 6-7 · Electrochemical characterization · Figure 4d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
cycle count	4000 cycles at 7 A g-1	—	—	Text Exact Reported	6 · Electrochemical characterization · Figure 4d
capacity retention after 4000 cycles	essentially unchanged; approximately 99% from Figure 4d	—	visual estimate	Visual Estimate Approximate	6-7 · Electrochemical characterization · Figure 4d

electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

Ni-MOF working electrode on nickel foam · Electrode

Frequency range 100 kHz to 0.01 Hz with 5 mV potential amplitude; fitted with equivalent circuit.

Geometry: three-electrode cell
Context: Ni-MOF composite working electrode
Measurement source: 6 · Electrochemical characterization · Figure 4c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
charge-transfer resistance	about 0.45 ohm	—	about	Text Approximate	6 · Electrochemical characterization · Figure 4c

galvanostatic charge-discharge (GCD)

Galvanostatic cycling

Ni-MOF working electrode on nickel foam · Electrode

Ni-MOF working electrode tested at current densities of 1, 3, 5, 7 and 10 A g-1 in 3 M KOH.

Geometry: three-electrode cell
Context: Ni-MOF composite working electrode
Measurement source: 6-7 · Electrochemical characterization · Figure 4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
specific capacitance at 10 A g-1	212 F g-1 at 10 A g-1	—	—	Text Exact Reported	6 · Electrochemical characterization · Figure 4b
specific capacitance at 1 A g-1Marked as a best value within this paper	318 F g-1 at 1 A g-1	—	—	Text Exact Reported	1,6 · Abstract / Electrochemical characterization · Figure 4b
specific capacitance at 3 A g-1	275 F g-1 at 3 A g-1	—	—	Text Exact Reported	6 · Electrochemical characterization · Figure 4b
specific capacitance at 5 A g-1	249 F g-1 at 5 A g-1	—	—	Text Exact Reported	6 · Electrochemical characterization · Figure 4b
specific capacitance at 7 A g-1	232 F g-1 at 7 A g-1	—	—	Text Exact Reported	6 · Electrochemical characterization · Figure 4b