Electrochemistry Application — Wells-Dawson Arsenotungstate Porous Derivatives for Electrochemical Supercapacitor Electrodes and Electrocatalytically Active Materials

8 measurement groups · 27 results

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

Cyclic voltammetry

Voltammetry

1-GCE · Electrode

0.5 M H2SO4 solution; three-electrode cell; potentials vs saturated calomel electrode; scan rates 20-200 mV s-1.

Temperature: room temperature
Geometry: modified glassy carbon working electrode; Ag/AgCl reference in SI methods, SCE potential scale in main figures; Pt counter electrode
Context: composite electrode made from pristine compound 1 plus conductive carbon/binder
Measurement source: p005 · Capacitive Performance of Compounds 1 and 2 · Figure 7a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Mean CV peak potentials E1/2 for 1-GCE	401 (I-I'), -24 (II-II'), -142 (III-III'), -374 (IV-IV'), and -608 (V-V') mV	—	—	Text Exact Reported	p005 · Capacitive Performance · Figure 7

Cyclic voltammetry

Voltammetry

2-GCE · Electrode

0.5 M H2SO4 solution; three-electrode cell; potentials vs saturated calomel electrode; scan rates 20-200 mV s-1.

Temperature: room temperature
Geometry: modified glassy carbon working electrode; Ag/AgCl reference in SI methods, SCE potential scale in main figures; Pt counter electrode
Context: composite electrode made from pristine compound 2 plus conductive carbon/binder
Measurement source: p005 · Capacitive Performance of Compounds 1 and 2 · Figure 7b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CV area comparisonMarked as a best value within this paper	2-GCE > 1-GCE > {As2W18O62}-GCE	—	—	Text Qualitative	p005 · Capacitive Performance · Figure 7c
Mean CV peak potentials E1/2 for 2-GCE	391 (I-I'), -4 (II-II'), -309 (III-III'), and -522 (IV-IV') mV	—	—	Text Exact Reported	p005 · Capacitive Performance · Figure 7

Charge-discharge cycling durability

Galvanostatic cycling

1-GCE · Electrode

5000 cycles at current density of 2.4 A g-1.

Geometry: modified GCE
Context: compound 1 composite electrode
Measurement source: p006 · Capacitive Performance of Compounds 1 and 2 · Figure 9a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Capacitance retention after 5000 cycles	89.3%	—	—	Text Exact Reported	p001 · Abstract

Charge-discharge cycling durability

Galvanostatic cycling

2-GCE · Electrode

5000 cycles at current density of 2.4 A g-1.

Geometry: modified GCE
Context: compound 2 composite electrode
Measurement source: p006 · Capacitive Performance of Compounds 1 and 2 · Figure 9a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Capacitance retention after 5000 cyclesMarked as a best value within this paper	91.9%	—	—	Text Exact Reported	p001 · Abstract

Charge-discharge cycling durability

Galvanostatic cycling

{As2W18O62}-GCE · Electrode

5000 cycles at current density of 2.4 A g-1.

Geometry: modified GCE
Context: unmodified Dawson control composite electrode
Measurement source: p006 · Capacitive Performance of Compounds 1 and 2 · Figure 9a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Control capacitance retention after 5000 cycles	70.2%	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 9a

Galvanostatic charge-discharge (GCD)

Galvanostatic cycling

1-GCE · Electrode

0.5 M H2SO4; current densities reported as 2.4, 4.8, 7.2, 9.6, and 12.0 A g-1 in SI and figure captions.

Temperature: room temperature
Geometry: modified GCE working electrode in three-electrode system
Context: compound 1 composite electrode
Measurement source: p006 · Capacitive Performance of Compounds 1 and 2 · Figure 8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Areal capacitance at 12.0 A g-1	215.7 mF cm-2	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Areal capacitance at 2.4 A g-1Marked as a best value within this paper	289.7 mF cm-2	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Specific capacitance at 12.0 A g-1	621.3 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Specific capacitance at 2.4 A g-1Marked as a best value within this paper	834.8 F g-1	—	—	Text Exact Reported	p001 · Abstract
Specific capacitance at 4.8 A g-1	826.1 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Specific capacitance at 7.2 A g-1	688.7 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Specific capacitance at 9.6 A g-1	667.2 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8

Galvanostatic charge-discharge (GCD)

Galvanostatic cycling

2-GCE · Electrode

0.5 M H2SO4; current densities reported as 2.4, 4.8, 7.2, 9.6, and 12.0 A g-1 in SI and figure captions.

Temperature: room temperature
Geometry: modified GCE working electrode in three-electrode system
Context: compound 2 composite electrode
Measurement source: p006 · Capacitive Performance of Compounds 1 and 2 · Figure 8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Areal capacitance at 12.0 A g-1	271.0 mF cm-2	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Areal capacitance at 2.4 A g-1Marked as a best value within this paper	332.4 mF cm-2	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Specific capacitance at 12.0 A g-1	780.4 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Specific capacitance at 2.4 A g-1Marked as a best value within this paper	960.1 F g-1	—	—	Text Exact Reported	p001 · Abstract
Specific capacitance at 4.8 A g-1	872.3 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Specific capacitance at 7.2 A g-1	818.2 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Specific capacitance at 9.6 A g-1	785.0 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8

Galvanostatic charge-discharge (GCD)

Galvanostatic cycling

{As2W18O62}-GCE · Electrode

0.5 M H2SO4; current densities reported as 2.4, 4.8, 7.2, 9.6, and 12.0 A g-1 in SI and figure captions.

Temperature: room temperature
Geometry: modified GCE working electrode in three-electrode system
Context: unmodified Dawson control composite electrode
Measurement source: p006 · Capacitive Performance of Compounds 1 and 2 · Figure 8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Control areal capacitance at 12.0 A g-1	75.7 mF cm-2	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Control areal capacitance at 2.4 A g-1	101.4 mF cm-2	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Control specific capacitance at 12.0 A g-1	221.0 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Control specific capacitance at 2.4 A g-1	292.1 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Control specific capacitance at 4.8 A g-1	283.2 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Control specific capacitance at 7.2 A g-1	263.6 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8
Control specific capacitance at 9.6 A g-1	245.3 F g-1	—	—	Text Exact Reported	p006 · Capacitive Performance · Figure 8