Electrochemistry Application — Solid-solid interface growth of conductive metal-organic framework nanowire arrays and their supercapacitor application

6 measurement groups · 22 results

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

CV of blank current collector

Voltammetry

Blank polished Cu foil current collector · Electrode

Blank copper foil scanned from -0.6 V to -0.02 V vs Ag/AgCl at 100 mV s-1.

Geometry: Blank Cu foil current collector in three-electrode configuration
Context: Non-MOF blank control
Measurement source: main p.6, article p.248 · Supercapacitor performance · Fig. S10a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Blank Cu foil CV response	Almost flat CV curve; current collector capacitance can be neglected	—	—	Text Qualitative	main p.6, article p.248 · Supercapacitor performance · Fig. S10a

Three-electrode rate capability and EIS comparison

Impedance spectroscopy

Cu3(HHTP)2 powder electrode on Cu foil with PVDF binder · Electrode

Cu3(HHTP)2 powder electrode in 1 M KCl aqueous electrolyte compared with NWA electrode; EIS at open-circuit potential, 5 mV amplitude, 0.01 Hz to 100 kHz.

Geometry: Powder electrode on Cu foil with PVDF binder, no conductive additive
Context: Composite powder-control electrode containing pristine Cu3(HHTP)2 plus PVDF binder
Measurement source: main p.6-7, article pp.248-249 · Supercapacitor performance · Fig. 6d; Fig. S10b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
EIS resistance comparison	Ohmic, charge-transfer and diffusive resistances are all significantly lower for NWA electrode than powder electrode	—	—	Text Qualitative	main p.7, article p.249 · Supercapacitor performance · Fig. S10b
Powder-electrode capacitance retention from 0.5 to 10 A g-1	19.7%	—	—	Text Exact Reported	main p.6, article p.248 · Supercapacitor performance · Fig. 6d
NWA versus powder electrode capacitance comparison	NWA electrode exhibits two times higher specific gravimetric capacitance than powder electrode	—	—	Text Approximate	main p.6, article p.248 · Supercapacitor performance · Fig. 6d

Two-electrode symmetric supercapacitor CV and GCD

Voltammetry Galvanostatic cycling

Symmetric supercapacitor assembled from two Cu3(HHTP)2 NWA electrodes · Electrode

Two identical Cu3(HHTP)2 NWA electrodes in 1 M KCl; CV/GCD from 0 to 0.8 V; capacitance based on total active material mass.

Geometry: Symmetric two-electrode cell with separator membrane
Context: Device assembled from pristine Cu3(HHTP)2 NWA electrodes on Cu foil
Measurement source: main p.7, article p.249 · Supercapacitor performance · Fig. 7a-b; Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Symmetric-cell specific gravimetric capacitance at 0.25 A g-1Marked as a best value within this paper	239.1 F g-1 at 0.25 A g-1	50.3 uF cm-2	—	Text Exact Reported	main p.7, article p.249 · Supercapacitor performance · Fig. 7b
Symmetric-cell specific gravimetric capacitance at 0.5 A g-1	195.3 F g-1 at 0.5 A g-1	41.1 uF cm-2	—	Text Exact Reported	main p.7, article p.249 · Supercapacitor performance · Fig. 7b; Table S1
Symmetric-cell specific gravimetric capacitance at 1.0 A g-1	143.6 F g-1 at 1.0 A g-1	30.2 uF cm-2	—	Text Exact Reported	main p.7, article p.249 · Supercapacitor performance · Fig. 7b
Symmetric-cell specific gravimetric capacitance at 2.5 A g-1	137.5 F g-1 at 2.5 A g-1	28.9 uF cm-2	—	Text Exact Reported	main p.7, article p.249 · Supercapacitor performance · Fig. 7b
Symmetric-cell specific gravimetric capacitance at 5.0 A g-1	130.8 F g-1 at 5.0 A g-1	27.4 uF cm-2	—	Text Exact Reported	main p.7, article p.249 · Supercapacitor performance · Fig. 7b
Symmetric-cell capacitance retention from 0.25 to 5 A g-1	54.7%	—	—	Text Exact Reported	main p.7, article p.249 · Supercapacitor performance · Fig. S12a
Table S1 this-work benchmark row	Cu3(HHTP)2 NWAs: 195.3 F g-1 (0.5 A g-1), 1 M KCl, normalised capacitance 41.1 uF cm-2 (BET SSA 475 m2 g-1)	41.1 uF cm-2	—	SI Table Exact Reported	SI p.S13 · Table S1 · Table S1

Two-electrode GCD cycling and Ragone analysis

Galvanostatic cycling

Symmetric supercapacitor assembled from two Cu3(HHTP)2 NWA electrodes · Electrode

5000 GCD cycles between 0 and 0.8 V at 5 A g-1; energy and power density plotted versus current density.

Geometry: Symmetric two-electrode cell
Context: Device assembled from pristine Cu3(HHTP)2 NWA electrodes on Cu foil
Measurement source: main p.7, article p.249 · Supercapacitor performance · Fig. 7d; Fig. S12

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Symmetric-cell capacitance retention after 5000 cycles	79.9%	—	—	Text Exact Reported	main p.7, article p.249 · Supercapacitor performance · Fig. 7d
Symmetric-cell gravimetric energy density at 0.5 A g-1Marked as a best value within this paper	4.3 W h kg-1 at 0.5 A g-1	—	—	Text Exact Reported	main p.7, article p.249 · Supercapacitor performance · Fig. S12b
Symmetric-cell gravimetric power density at 0.5 A g-1	200 W kg-1	—	—	Text Exact Reported	main p.7, article p.249 · Supercapacitor performance · Fig. S12b

Three-electrode CV and galvanostatic charge-discharge

Voltammetry Galvanostatic cycling

Cu3(HHTP)2 nanowire arrays in situ grown on Cu foil · Electrode

Cu3(HHTP)2 NWAs on Cu foil used as sole working electrode; Pt counter electrode and Ag/AgCl reference; 1 M KCl aqueous electrolyte; GCD from -0.6 to -0.02 V.

Geometry: Three-electrode cell; mass loading 1.0 mg cm-2 for electrodes
Context: Pristine Cu3(HHTP)2 NWA additive-free electrode on Cu foil
Measurement source: main p.6, article p.248 · Supercapacitor performance · Fig. 6a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Three-electrode specific gravimetric capacitance at 0.5 A g-1Marked as a best value within this paper	215.9 F g-1 at 0.5 A g-1	—	—	Text Exact Reported	main p.6, article p.248 · Supercapacitor performance · Fig. 6b
Three-electrode specific gravimetric capacitance at 1 A g-1	206.7 F g-1 at 1 A g-1	—	—	Text Exact Reported	main p.6, article p.248 · Supercapacitor performance · Fig. 6b
Three-electrode specific gravimetric capacitance at 10 A g-1	155.2 F g-1 at 10 A g-1	—	—	Text Exact Reported	main p.6, article p.248 · Supercapacitor performance · Fig. 6b
Three-electrode specific gravimetric capacitance at 2 A g-1	195.2 F g-1 at 2 A g-1	—	—	Text Exact Reported	main p.6, article p.248 · Supercapacitor performance · Fig. 6b
Three-electrode specific gravimetric capacitance at 5 A g-1	168.1 F g-1 at 5 A g-1	—	—	Text Exact Reported	main p.6, article p.248 · Supercapacitor performance · Fig. 6b
Three-electrode capacitance retention from 0.5 to 10 A g-1	71.9%	—	—	Text Exact Reported	main p.6, article p.248 · Supercapacitor performance · Fig. 6d

Three-electrode GCD cycling stability and post-cycling PXRD

X-ray diffraction and scattering Galvanostatic cycling

Cu3(HHTP)2 nanowire arrays in situ grown on Cu foil · Electrode

5000 GCD cycles between -0.6 V and -0.02 V at 10 A g-1 in 1 M KCl; PXRD before/after cycling.

Geometry: Three-electrode cell
Context: Pristine Cu3(HHTP)2 NWA additive-free electrode on Cu foil
Measurement source: main p.6, article p.248 · Supercapacitor performance · Fig. 6c; Fig. S11

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
PXRD stability after cycling	Negligible change at 2theta ~28 degrees after cycling	—	~	Text Approximate	main p.6, article p.248 · Supercapacitor performance · Fig. S11
Three-electrode capacitance retention after 5000 cycles	79.7%	—	—	Text Exact Reported	main p.6, article p.248 · Supercapacitor performance · Fig. 6c