Electrochemistry Application — Ultrathin two-dimensional conjugated metal-organic framework single-crystalline nanosheets enabled by surfactant-assisted synthesis

7 measurement groups · 26 results

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

Cyclic voltammetry.

Voltammetry

HHB-Cu NS organic cathode electrode · Electrode

CV at 1 mV s^-1; optimised potential window 1.3-2.6 V vs Li/Li+.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode using pristine HHB-Cu NS active material
Measurement source: main p.5 · Results and discussion · Fig. 3A; Fig. S19; Fig. S24

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HHB-Cu NS CV oxidation peak	1.93 V vs Li/Li+	—	—	Text Exact Reported	main p.6 · Results and discussion · Fig. S24
HHB-Cu NS CV reduction peak	1.64 V vs Li/Li+	—	—	Text Exact Reported	main p.6 · Results and discussion · Fig. S24
Optimal CV/electrochemical potential windowMarked as a best value within this paper	1.3-2.6 V vs Li/Li+	—	range	Caption Range	SI p.25 · Figure S19 caption · Fig. S19

Cyclic voltammetry comparison.

Voltammetry

HHB-Ni nanosheets · Nanosheet

HHB-Ni NSs compared with HHB-Cu NSs at 1 mV s^-1 for redox-site interpretation.

Temperature: room temperature
Geometry: Li-ion coin-cell electrode context
Context: pristine framework active material in electrode context
Measurement source: main p.6 · Results and discussion · Fig. S24

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HHB-Ni NS broadened CV peak region	1.9-2.5 V vs Li/Li+	—	range	Text Range	main p.6 · Results and discussion · Fig. S24

Long-term galvanostatic cycling.

Galvanostatic cycling

HHB-Cu NS organic cathode electrode · Electrode

HHB-Cu NS cathode cycled at 1.0 A g^-1; 1.3-2.6 V vs Li/Li+.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode using pristine HHB-Cu NS active material
Measurement source: main p.5 · Results and discussion · Fig. 3D; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Coulombic efficiency after long-term cyclingMarked as a best value within this paper	100%	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 3D
Capacity retention after 1000 cyclesMarked as a best value within this paper	90% after 1000 cycles at 1.0 A g^-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 3D; Table S2

Electrochemical impedance spectroscopy (EIS), Nyquist plot.

Impedance spectroscopy

HHB-Cu NS organic cathode electrode · Electrode

EIS comparison of HHB-Cu NS and bulk HHB-Cu cathodes.

Geometry: 2032 coin-cell electrode context
Context: HHB-Cu NS electrode compared with bulk HHB-Cu electrode
Measurement source: main p.5 · Results and discussion · Fig. 4C

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Bulk HHB-Cu charge-transfer resistance	~216 ohm	—	—	Text Approximate	main p.5 · Results and discussion · Fig. 4C
HHB-Cu NS charge-transfer resistanceMarked as a best value within this paper	~85 ohm	—	—	Text Approximate	main p.5 · Results and discussion · Fig. 4C

CV, galvanostatic charge-discharge, rate and cycling tests.

Voltammetry Galvanostatic cycling

bulk HHB-Cu cathode electrode · Electrode

Bulk HHB-Cu cathode measured under same Li-ion coin-cell conditions as HHB-Cu NS electrode.

Temperature: room temperature
Geometry: 2032 coin cell
Context: bulk control composite electrode
Measurement source: main p.5 · Results and discussion · Fig. 4A-B; Fig. S20; Fig. S23; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Bulk HHB-Cu active-site utilization	13.4%	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 4B
Bulk HHB-Cu capacity range in text	40-50 mA h g^-1	—	range	Text Range	main p.5 · Results and discussion · Fig. S20
Bulk HHB-Cu specific capacity at 0.1 A g^-1	40 mA h g^-1	—	—	SI Table Exact Reported	SI p.34 · Table S2 · Table S2
Bulk HHB-Cu capacity at 2.0 A g^-1	4.6 mA h g^-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. S23B
Bulk HHB-Cu rate retention at 2.0 A g^-1 vs 0.1 A g^-1	11.5%	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. S23B
Bulk HHB-Cu cycling retention after 50 cycles	65% after 50 cycles	—	—	SI Table Exact Reported	SI p.34 · Table S2 · Table S2

2032 coin-cell Li-ion cathode testing.

HHB-Cu NS organic cathode electrode · Electrode

Li foil counter electrode, Celgard 2400 separator, 1 M LiPF6 in EC/EMC 1:1, Ar-filled glovebox below 0.1 ppm oxygen/water; capacity based on active material mass.

Temperature: room temperature
Atmosphere: Ar glovebox for assembly
Geometry: 2032 coin cell
Context: composite electrode using pristine HHB-Cu NS active material
Measurement source: SI p.2-p.3 · Electrochemical measurement

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Active material areal loading	1.5-2 mg cm^-2	—	range	Text Range	SI p.2 · Preparation of organic cathodes

Galvanostatic charge-discharge.

Galvanostatic cycling

HHB-Cu NS organic cathode electrode · Electrode

Potential window 1.3-2.6 V vs Li/Li+ unless otherwise noted; current densities from 0.1 to 2.0 A g^-1.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode using pristine HHB-Cu NS active material
Measurement source: main p.5 · Results and discussion · Fig. 3B-C; Fig. S20-S22

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HHB-Cu NS specific capacity at 0.1 A g^-1Marked as a best value within this paper	153 mA h g^-1 at 0.1 A g^-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. S20
HHB-Cu NS capacity in 1.3-3.3 V window	pushed up to 300 mA h g^-1	—	—	Text Rounded Reported	main p.5 · Results and discussion · Fig. S22
HHB-Cu NS capacity in 1.3-4.0 V window	pushed up to 400 mA h g^-1	—	—	Text Rounded Reported	main p.5 · Results and discussion · Fig. S22
HHB-Cu NS reversible capacity after 50 cycles	122 mA h g^-1 after 50 cycles at 0.1 A g^-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. S21
Capacity retention after tens of cycles in extended windows	36.0-66.7%	—	range	Text Range	main p.5 · Results and discussion · Fig. S22
HHB-Cu NS rate capacity at 0.1 A g^-1	122 mA h g^-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 3C
HHB-Cu NS rate capacity at 0.2 A g^-1	111 mA h g^-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 3C
HHB-Cu NS rate capacity at 0.4 A g^-1	105 mA h g^-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 3C
HHB-Cu NS rate capacity at 0.8 A g^-1	100 mA h g^-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 3C
HHB-Cu NS rate capacity at 1.0 A g^-1	99 mA h g^-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 3C
HHB-Cu NS rate capacity at 2.0 A g^-1	94 mA h g^-1	—	—	Text Exact Reported	main p.5 · Results and discussion · Fig. 3C