Electrochemistry Application — A Conductive 2D Conjugated Tetrathia[8]circulene-Based Nickel Metal–Organic Framework for Energy Storage

4 measurement groups · 19 results

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

two-electrode symmetric solid-state supercapacitor CV, GCD, EIS, cycling and LED demo

Impedance spectroscopy Voltammetry Galvanostatic cycling

Ni-TTC symmetric solid-state supercapacitor · Electrode

Two identical Ni-TTC carbon-paper electrodes; polyacrylamide hydrogel; 50 uL 1 M KCl; operating window up to 1.2 V

Geometry: symmetric two-electrode solid-state cell
Context: device using composite Ni-TTC electrodes
Measurement source: 5-6 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 5; Figures S19-S20; Tables S8-S9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
symmetric device gravimetric capacitanceMarked as a best value within this paper	187 F g-1 at 0.2 A g-1	—	—	Text Exact Reported	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 5c; Table S8
symmetric device cycling retention	54% after 2000 GCD cycles at 2 A g-1	—	—	Text Exact Reported	6 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 5e
symmetric device energy density at 0.11 kW kg-1Marked as a best value within this paper	9.35 W h kg-1 at 0.11 kW kg-1	—	—	Text Exact Reported	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure S20; Table S9 referenced
symmetric device energy density at 0.11 kW kg-1 from SI table	9.33 W h kg-1 at 0.11 kW kg-1	—	—	SI Table Exact Reported	24 · Section 5. Supporting Tables · Table S9
symmetric device energy density at 0.48 kW kg-1	8.13 W h kg-1 at 0.48 kW kg-1	—	—	SI Table Exact Reported	24 · Section 5. Supporting Tables · Table S9
symmetric device energy density at 2.43 kW kg-1	5.19 W h kg-1 at 2.43 kW kg-1	—	—	Text Exact Reported	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure S20; Table S9 referenced
LED demonstration	red LEDs (2.0 V) lit by three cells in series	—	—	Text Qualitative	6 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 5f
device operating voltage window	approximately rectangular until 1.2 V; ineffective charge above 1.2 V	—	—	Text Exact Reported	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 5a

three-electrode CV and galvanostatic charge-discharge

Voltammetry Galvanostatic cycling

Ni-TTC carbon-paper film electrode · Electrode

1 M KCl aqueous electrolyte; SCE reference; Pt wire counter; CV -0.5 to 0.5 V vs SCE at 1-100 mV s-1; GCD 0.2-5.0 A g-1

Geometry: Ni-TTC/PTFE/carbon black on carbon paper; three-electrode cell
Context: composite electrode with pristine Ni-TTC active material
Measurement source: 4 · Standard three-electrode system measurements · Figure 4; Figures S13-S18; Table S7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
GCD current-density capacitance retention	65% retention from 0.2 to 5 A g-1	—	—	Text Exact Reported	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure S18
gravimetric capacitance from CV at 1 mV s-1	245 F g-1 at 1 mV s-1	—	—	Text Exact Reported	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 4a
Ni-TTC CV redox peak pairs at 1 mV s-1	-0.302/-0.379 V, 0.074/-0.068 V and 0.296/0.104 V vs SCE	—	—	Text Exact Reported	4 · 2.4. Supercapacitor Performance of Ni-TTC · Figure S13
three-electrode cycling retention	80% after 1800 cycles at 2 A g-1	—	—	Text Exact Reported	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 4c
EDLC contribution at 100 mV s-1	approximately 70% EDLC by visual read of Figure 4f	—	visual estimate from stacked bar	Visual Estimate Approximate	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 4f
three-electrode gravimetric capacitance from GCDMarked as a best value within this paper	249 F g-1 at 0.2 A g-1	—	—	Text Exact Reported	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 4b; Table S7
three-electrode gravimetric capacitance at 5 A g-1	161 F g-1 at 5 A g-1	—	—	Text Exact Reported	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure S18
pseudocapacitance contribution at 10 mV s-1	close to 80%	—	—	Text Approximate	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 4e; Figure S16
CV scan-rate capacitance retention	27% retained from 1 to 100 mV s-1	—	—	Text Exact Reported	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure S15

electrochemical impedance spectroscopy

Impedance spectroscopy

Ni-TTC carbon-paper film electrode · Electrode

Frequency range 0.01 Hz to 100 kHz; open-circuit potential; preconditioned for 50 CV cycles

Geometry: Ni-TTC/PTFE/carbon black on carbon paper; three-electrode cell
Context: composite electrode with pristine Ni-TTC active material
Measurement source: 4 · Measurement of electrochemical impedance spectroscopy · Figure 4d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
three-electrode EIS behaviour	almost vertical low-frequency region and low ionic resistance	—	—	Text Qualitative	5 · 2.4. Supercapacitor Performance of Ni-TTC · Figure 4d

CV of 8OH-TTC ligand control

Voltammetry

8OH-TTC ligand · Powder

Same condition as Ni-TTC three-electrode CV, used to compare ligand redox activity

Geometry: control electrochemical test
Context: organic ligand control
Measurement source: 4 · 2.4. Supercapacitor Performance of Ni-TTC · Figure S14

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
8OH-TTC ligand CV redox peak pairs	0.083/0.029 V and 0.298/0.161 V vs SCE	—	—	Text Exact Reported	4 · 2.4. Supercapacitor Performance of Ni-TTC · Figure S14