Electrochemistry Application — Stabilization of Hexaaminobenzene in a 2D Conductive Metal-Organic Framework for High Power Sodium Storage

8 measurement groups · 35 results

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

Galvanostatic voltage profiles and rate capability of carbon-free Co-HAB-D electrode

Galvanostatic cycling

Carbon-free Co-HAB-D electrode · Electrode

Carbon-free Co-HAB-D tested at 50 mA g^-1 and varied current densities; figure data only partly available from attached SI page.

Temperature: not specified
Atmosphere: coin cell electrolyte environment
Geometry: carbon-free composite electrode in Na half-cell
Context: electrode without carbon additive, based on pristine Co-HAB-D active material
Measurement source: main p.10320 · Results and Discussion · Fig. S10

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Carbon-free electrode approximate capacity calculated from 76% of 312 mAh g-1	0.76 x 312 mAh g-1 = ~237 mAh g-1	—	—	Calculated From Reported Approximate	main p.10320 · Results and Discussion · Fig. S10
Carbon-free electrode capacity as fraction of theoretical	76% of theoretical capacity	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. S10

Cyclic voltammetry and b-value/capacitive contribution analysis

Voltammetry

Standard Co-HAB-D sodium half-cell electrode · Electrode

CV in Na half-cells at sweep rates from 0.375 to 3 mV s^-1; b-values determined from cathodic peak current versus sweep rate; capacitive contribution evaluated at 0.375 mV s^-1.

Temperature: not specified
Atmosphere: coin cell electrolyte environment
Geometry: standard Co-HAB electrode in Na half-cell
Context: composite electrode containing pristine Co-HAB active material
Measurement source: main p.10320-10321 · Results and Discussion · Fig. 5a-c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cathodic b-value at 0.5 V	b = 0.74 at 0.5 V	—	—	Text Exact Reported	main p.10321 · Results and Discussion · Fig. 5b
Cathodic b-value at 1.25 V	b = 0.74 at 1.25 V	—	—	Text Exact Reported	main p.10321 · Results and Discussion · Fig. 5b
Capacitive contribution at 0.375 mV s-1	47% of total current	—	—	Text Exact Reported	main p.10321 · Results and Discussion · Fig. 5c
Maximum CV sweep rate	3 mV s-1	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. 5a
Minimum CV sweep rate	0.375 mV s-1	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. 5a

Areal capacity versus active mass loading and high-loading rate test

High-mass-loading Co-HAB-D electrode · Electrode

Co-HAB-D electrodes with active mass loadings 1.3-9.6 mg cm^-2 tested at 50 mA g^-1; 4.4 mg cm^-2 electrode tested at areal current density around 4.4 mA cm^-2.

Temperature: not specified
Atmosphere: coin cell electrolyte environment
Geometry: high mass loading composite electrodes
Context: composite electrode containing pristine Co-HAB-D
Measurement source: main p.10320 · Results and Discussion · Fig. 4a-c; Fig. S11

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Areal capacity at 4.4 mg cm-2 high-rate electrode	0.85 mAh cm-2 at 4.4 mA cm-2	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. 4c
Areal capacity at 9.6 mg cm-2Marked as a best value within this paper	2.6 mAh cm-2	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. 4a,b; Table S3
Areal capacity at low active mass loading	0.35 mAh cm-2	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. 4a,b
Areal current density for 4.4 mg cm-2 electrode	4.4 mA cm-2	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. 4c
Areal current density for 2.6 mAh cm-2 value	0.5 mA cm-2	—	—	SI Table Exact Reported	SI p.S13 · Table S3 · Table S3
Maximum active mass loading in areal-capacity series	9.6 mg cm-2	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. 4a,b
Minimum active mass loading in areal-capacity series	1.3 mg cm-2	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. 4a,b
Specific capacity retained at 9.6 mg cm-2 relative to 1.3 mg cm-2	90%	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. S11

Galvanostatic cycling with lower discharge cutoff

Galvanostatic cycling

Co-HAB sodium electrode tested with 0.05 V lower cutoff · Electrode

Na cell cycled with lower discharge cutoff potential of 0.05 V vs Na+/Na; retention assessed after 40 cycles.

Temperature: not specified
Atmosphere: coin cell electrolyte environment
Geometry: Co-HAB composite electrode in Na half-cell
Context: composite electrode containing Co-HAB
Measurement source: main p.10319 · Results and Discussion · Fig. S9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cycle count for low-cutoff retention	40 cycles	—	—	Text Exact Reported	main p.10319 · Results and Discussion · Fig. S9
Capacity retention with 0.05 V lower cutoff	only 34% retained after 40 cycles	—	—	Text Exact Reported	main p.10319 · Results and Discussion · Fig. S9

Rate capability and discharge profiles at varied current density

Standard Co-HAB-D sodium half-cell electrode · Electrode

Na half-cells measured from 0.1 to 12 A g^-1; Co-HAB-D compared with Co-HAB-A4 and Co-HAB-A10.

Temperature: not specified
Atmosphere: coin cell electrolyte environment
Geometry: standard composite electrodes in Na half-cells
Context: composite electrode; comparison among pristine active-material variants
Measurement source: main p.10320 · Results and Discussion · Fig. 3c-f; Table S3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Table S3 specific capacity at 50 mA g-1	295 mAh g-1 at 50 mA g-1	—	—	SI Table Exact Reported	SI p.S13 · Table S3 · Table S3
Specific capacity at 12 A g-1	152 mAh g-1 at 12 A g-1	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. 3d; Table S3
Specific capacity at 1 A g-1	228 mAh g-1 at 1 A g-1	—	—	Text Exact Reported	main p.10316 · Introduction/summary · Fig. 3e
Specific capacity at 2 A g-1	214 mAh g-1 at 2 A g-1	—	—	Text Exact Reported	main p.10320 · Results and Discussion · Fig. 3d; Table S3
Total-electrode-mass capacity at 10.8 A g-1	136 mAh g-1 at 10.8 A g-1	—	—	SI Table Exact Reported	SI p.S13 · Table S3 · Table S3
Total-electrode-mass capacity at 1.8 A g-1	193 mAh g-1 at 1.8 A g-1	—	—	SI Table Exact Reported	SI p.S13 · Table S3 · Table S3

Open-circuit self-discharge test on fully charged Na half-cell

Standard Co-HAB-D sodium half-cell electrode · Electrode

Fully charged cell stored on open circuit for 10 days; voltage and capacity after storage measured.

Temperature: not specified
Atmosphere: coin cell electrolyte environment
Geometry: standard Co-HAB Na half-cell
Context: composite electrode containing pristine Co-HAB
Measurement source: main p.10321 · Results and Discussion · Fig. 5d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Capacity retained after 10 days storage	more than 85% of original capacity	—	—	Text Approximate	main p.10321 · Results and Discussion · Fig. 5d
Self-discharge rate	less than 0.003 V h-1	—	—	Text Approximate	main p.10321 · Results and Discussion · Fig. 5d
Self-discharge storage time	10 days	—	—	Text Exact Reported	main p.10321 · Results and Discussion · Fig. 5d

Galvanostatic cycling of 2032 Na half-cells

Galvanostatic cycling

Standard Co-HAB-D sodium half-cell electrode · Electrode

Voltage window 0.5-3.0 V vs Na+/Na; standard electrode with 90 wt% Co-HAB; Na metal anode and 1 M NaPF6 in DEGDME electrolyte.

Temperature: not specified
Atmosphere: coin cell electrolyte environment
Geometry: 2032-type coin cell, 1 cm2 electrode disks
Context: composite electrode containing pristine Co-HAB active material
Measurement source: main p.10319 · Results and Discussion · Fig. 3a,b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Coulombic efficiency during cycling	close to 100%	—	—	Text Approximate	main p.10319 · Results and Discussion · Fig. 3b
Capacity retained during cycling at 500 mA g-1	226 mAh g-1 at 500 mA g-1 for more than 50 cycles	—	—	Text Exact Reported	main p.10319 · Results and Discussion · Fig. 3b
Cycle count for retained capacity	more than 50 cycles	—	—	Text Approximate	main p.10319 · Results and Discussion · Fig. 3b
Sodium ions stored per HAB	2.8 Na+ per HAB	—	—	Text Exact Reported	main p.10319 · Results and Discussion · Fig. 3a
Reversible specific capacity at 50 mA g-1Marked as a best value within this paper	as high as 291 mAh g-1 at 50 mA g-1	—	—	Text Exact Reported	main p.10319 · Results and Discussion · Fig. 3a
Theoretical specific capacity for 3 Na per HAB	312 mAh g-1	—	—	Text Exact Reported	main p.10316 · Introduction/summary

Galvanostatic cycling of Ni-HAB in Na half-cell

Galvanostatic cycling

Ni-HAB sodium half-cell electrode · Electrode

Conditions identical to Co-HAB; current 50 mA g^-1 and voltage window 0.5-3.0 V according to Fig. S12 caption.

Temperature: not specified
Atmosphere: coin cell electrolyte environment
Geometry: Ni-HAB electrode in Na half-cell
Context: comparison conductive MOF electrode
Measurement source: SI p.S14 · Electrochemical studies on Co-HAB · Fig. S12

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HAB reversible capacity	295 mAh g-1 at 50 mA g-1	—	—	Text Exact Reported	main p.10321 · Results and Discussion · Fig. S12
Ni-HAB cycle stability versus Co-HAB	marginally worse than Co-HAB	—	—	Text Qualitative	main p.10321 · Results and Discussion · Fig. S12
Ni-HAB sodium ions stored per HAB	2.8 Na+ per HAB	—	—	Text Exact Reported	main p.10321 · Results and Discussion · Fig. S12