Electrochemistry Application — 2D/2D NiCo-MOFs/GO hybrid nanosheets for high-performance asymmetrical supercapacitor

8 measurement groups · 33 results

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

Activated carbon electrode CV, GCD, EIS and capacity-current testing

Impedance spectroscopy Voltammetry Galvanostatic cycling

Activated carbon negative electrode · Electrode

AC electrode characterised over -1.0 to 0 V by CV, GCD and Nyquist plot; shown in SI Fig. S9 as negative-electrode control/context for ASC.

Atmosphere: 2 mol L-1 KOH electrolyte
Geometry: Nickel foam working electrode in three-electrode tests; negative electrode in ASC.
Context: Non-MOF negative-electrode component/control.
Measurement source: main p.5 · Results and discussion · Fig. S9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
AC negative electrode electrochemical context	AC electrode demonstrates excellent electrochemical performance.	—	—	Text Qualitative	main p.5 · Results and discussion · Fig. S9

Asymmetric supercapacitor CV, GCD, EIS, Ragone and cycling tests

Impedance spectroscopy Voltammetry Galvanostatic cycling

NCMG-10//AC asymmetric supercapacitor · Electrode

NCMG-10 positive electrode, AC negative electrode, 2 M KOH electrolyte; working voltage set to 1.5 V; CV from 5-50 mV s-1; cycling over 10000 cycles.

Atmosphere: 2 mol L-1 KOH electrolyte
Geometry: Two-electrode asymmetric supercapacitor device.
Context: Application device based on NCMG-10 composite.
Measurement source: main p.5-p.6 · Results and discussion · Fig. 6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ASC anodic peak b-value	0.81	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 6d
ASC cathodic peak b-value	0.73	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 6d
ASC capacitive contribution at 10 mV s-1	63.35%	—	—	Text Exact Reported	main p.5 · Results and discussion · Figs. 6f and S11
ASC capacitive contribution at 20 mV s-1	71.12%	—	—	Text Exact Reported	main p.5 · Results and discussion · Figs. 6f and S11
ASC capacitive contribution at 30 mV s-1	72.72%	—	—	Text Exact Reported	main p.5 · Results and discussion · Figs. 6f and S11
ASC capacitive contribution at 50 mV s-1Marked as a best value within this paper	94.09%	—	—	Text Exact Reported	main p.5 · Results and discussion · Figs. 6f and S11
ASC capacitive contribution at 5 mV s-1	58.51%	—	—	Text Exact Reported	main p.5 · Results and discussion · Figs. 6f and S11
ASC specific capacity at 0.5 A g-1Marked as a best value within this paper	188.61 C g-1 at 0.5 A g-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 6h
ASC specific capacity at 10 A g-1	120 C g-1 at 10 A g-1	—	—	Text Rounded Reported	main p.5 · Results and discussion · Fig. 6h
ASC capacity in comparison table	188.65 C g-1	—	—	SI Table Exact Reported	SI rendered p.13 · S4 Results and discussion · Table S2
Maximum energy densityMarked as a best value within this paper	36.83 Wh kg-1 at 374.99 W kg-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 6i
Equivalent internal resistance	about 1.48 ohm	—	about	Text Approximate	main p.5 · Results and discussion · Fig. S12
Power density paired with maximum energy density	374.99 W kg-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 6i
ASC capacity retention after 10000 cycles	78.65% over 10,000 cycles	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. S13
ASC working voltage	1.5 V	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. S10

CV scan-rate kinetics and capacitive/diffusion contribution analysis

Voltammetry

NCMG-10 · Nanosheet

NCMG-10 CV curves at different scan rates; b-values from log(v)-log(ip); capacitive contribution from k1v + k2v1/2 analysis.

Atmosphere: 2 mol L-1 KOH electrolyte
Geometry: Nickel foam working electrode.
Context: Composite target sample.
Measurement source: main p.4-p.5 · Results and discussion · Fig. 5e-i

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
b-value oxidation peak	0.96	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. 5g
b-value reduction peak	0.72	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. 5g
Capacitive contribution at 1 mV s-1	83.54%	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 5i
Capacitive contribution at 2 mV s-1	86.15%	—	—	Text Exact Reported	main p.5 · Results and discussion · Figs. 5i and S8
Capacitive contribution at 3 mV s-1	87.96%	—	—	Text Exact Reported	main p.5 · Results and discussion · Figs. 5i and S8
Capacitive contribution at 4 mV s-1	89.96%	—	—	Text Exact Reported	main p.5 · Results and discussion · Figs. 5i and S8
Capacitive contribution at 5 mV s-1Marked as a best value within this paper	91.78%	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 5i

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

NCMG-10 · Nanosheet

Three-electrode EIS in 2 mol L-1 KOH, frequency range 0.1 Hz to 100 kHz.

Atmosphere: 2 mol L-1 KOH electrolyte
Geometry: Nickel foam working electrode.
Context: Composite target sample.
Measurement source: SI text p.1 · S3 Electrochemical measurements

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Equivalent series resistance RsMarked as a best value within this paper	0.5 ohm	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. 5d

CV and galvanostatic charge-discharge (GCD)

Voltammetry Galvanostatic cycling

NCMG-10 · Nanosheet

Three-electrode system in 2 mol L-1 KOH; CV 0-0.5 V; GCD 0-0.4 V; capacities at 0.5 A g-1 and rate/cycling tests.

Atmosphere: 2 mol L-1 KOH electrolyte
Geometry: Nickel foam working electrode, active material loading about 2-3 mg.
Context: Best-performing NiCo-MOF/GO composite.
Measurement source: SI text p.1 · S3 Electrochemical measurements

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Specific capacity at 0.5 A g-1Marked as a best value within this paper	413.61 C g-1 at 0.5 A g-1	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. 5b
CV redox behaviour	CV profiles display a pair of redox peaks attributed to M-O/M-O-OH (M = Ni or Co), typical pseudocapacitive behaviour.	—	—	Text Qualitative	main p.4 · Results and discussion · Fig. 5a
Capacity decay after 5000 cycles	14.51% decay of initial capacity after 5000 cycles	85.49 % retained	—	Text Exact Reported	main p.4 · Results and discussion · Fig. S7
Capacity retention after 5000 cycles	85.49% retained after 5000 cycles at 7 A g-1	—	—	Figure Axis Approximate	SI rendered p.7 · S4 Results and discussion · Fig. S7
Specific capacity retention at 20 A g-1Marked as a best value within this paper	69.29% of the 0.5 A g-1 capacity retained at 20 A g-1	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. 5c

Galvanostatic charge-discharge (GCD)

Galvanostatic cycling

NCMG-15 · Nanosheet

Three-electrode system in 2 mol L-1 KOH; value at 0.5 A g-1.

Atmosphere: 2 mol L-1 KOH electrolyte
Geometry: Nickel foam working electrode.
Context: GO-composite comparison sample.
Measurement source: main p.4 · Results and discussion · Fig. 5b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Specific capacity at 0.5 A g-1	380.1 C g-1 at 0.5 A g-1	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. 5b

Galvanostatic charge-discharge (GCD)

Galvanostatic cycling

NCMG-5 · Nanosheet

Three-electrode system in 2 mol L-1 KOH; value at 0.5 A g-1.

Atmosphere: 2 mol L-1 KOH electrolyte
Geometry: Nickel foam working electrode.
Context: GO-composite comparison sample.
Measurement source: main p.4 · Results and discussion · Fig. 5b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Specific capacity at 0.5 A g-1	336.27 C g-1 at 0.5 A g-1	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. 5b

Galvanostatic charge-discharge (GCD)

Galvanostatic cycling

Pristine NiCo-MOF nanosheets · Nanosheet

Three-electrode system in 2 mol L-1 KOH; SCE reference, Pt foil counter; GCD potential range 0-0.4 V; value at 0.5 A g-1.

Atmosphere: 2 mol L-1 KOH electrolyte
Geometry: Nickel foam working electrode, active material loading about 2-3 mg.
Context: Pristine NiCo-MOF control.
Measurement source: SI text p.1 · S3 Electrochemical measurements

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Specific capacity at 0.5 A g-1	281.2 C g-1 at 0.5 A g-1	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. 5b
Specific capacity retention at 20 A g-1	47.65% at 20 A g-1	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. 5c