Electrochemistry Application — Engineering the modulation of the active sites and pores of pristine metal-organic frameworks for high-performance sodium-ion storage

16 measurement groups · 45 results

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

Galvanostatic discharge/charge

Galvanostatic cycling

Ni-HHTP-250 electrode · Electrode

2032 sodium-ion coin cells; Na metal counter electrode; 1 M NaClO4 in EC/DEC 1:1; 0.01-3.0 V vs Na+/Na; room temperature.

Temperature: room temperature
Atmosphere: Ar glovebox for assembly
Geometry: 2032 coin cell; Cu foil current collector; Whatman GF/F separator
Context: composite electrode with pristine MOF-derived active material plus carbon/binder
Measurement source: 397 · Electrochemical measurements

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
first-cycle Coulombic efficiency	about 39%	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4b
first-cycle charge capacity at 200 mA g-1	about 450 mA h g-1	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4b
first-cycle discharge capacity at 200 mA g-1	about 1162 mA h g-1	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4b
average discharge capacity at 0.1 A g-1Marked as a best value within this paper	about 420 mA h g-1	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4c,d
average discharge capacity at 0.2 A g-1	about 340 mA h g-1	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4c,d
average discharge capacity at 0.5 A g-1	about 280 mA h g-1	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4c,d
average discharge capacity at 1.0 A g-1	about 240 mA h g-1	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4c,d
average discharge capacity at 1.5 A g-1	about 215 mA h g-1	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4c,d
average discharge capacity at 2.0 A g-1	about 200 mA h g-1	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4c,d
recovered capacity when current returns to 0.1 A g-1	about 340 mA h g-1	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4c
recovered capacity when current returns to 0.2 A g-1	304 mA h g-1	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. 4c

Cyclic voltammetry

Voltammetry

Ni-HHTP-250 electrode · Electrode

CV in sodium-ion coin cell; first five curves at 0.1 mV s-1; voltage window 0.01-3.0 V vs Na+/Na.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode
Measurement source: 400 · Electrochemical performance · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
anodic redox peak	1.23 V	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. 4a
anodic redox peak	1.63 V	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. 4a
cathodic redox peak	0.37 V	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. 4a
cathodic redox peak	0.83 V	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. 4a
first cathodic SEI-related peak	about 0.69 V	—	—	Text Approximate	400 · Electrochemical performance · Fig. 4a

Cycling performance comparison

Ni-HHTP-160 electrode · Electrode

Sodium-ion coin cell at 500 mA g-1 after 100 cycles; value from Fig. S4b reported in text.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode with thermally treated MOF active material
Measurement source: 400 · Electrochemical performance · Fig. S4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HHTP-160 capacity after 100 cycles at 500 mA g-1	153 mA h g-1	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. S4b

Cycling performance by galvanostatic discharge/charge

Galvanostatic cycling

Ni-HHTP-250 electrode · Electrode

Sodium-ion coin cell cycled at 100, 200 and 500 mA g-1 for 100 cycles.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode
Measurement source: 400 · Electrochemical performance · Fig. 4e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
capacity after 100 cycles at 100 mA g-1	292 mA h g-1	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. 4e
capacity after 100 cycles at 200 mA g-1	286 mA h g-1	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. 4e
capacity after 100 cycles at 500 mA g-1Marked as a best value within this paper	257 mA h g-1	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. 4e

Cycling performance comparison

Ni-HHTP-340 electrode · Electrode

Sodium-ion coin cell at 500 mA g-1 after 100 cycles; value from Fig. S4b reported in text.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode with thermally treated MOF active material
Measurement source: 400 · Electrochemical performance · Fig. S4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HHTP-340 capacity after 100 cycles at 500 mA g-1	218 mA h g-1	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. S4b

Cycling performance comparison

Ni-HHTP-500 electrode · Electrode

Sodium-ion coin cell at 500 mA g-1 after 100 cycles; value from Fig. S5 reported in text.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode with carbonisation-temperature active material
Measurement source: 400 · Electrochemical performance · Fig. S5

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HHTP-500 capacity after 100 cycles at 500 mA g-1	188 mA h g-1	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. S5

Cycling performance comparison

pristine Ni-HHTP electrode · Electrode

Sodium-ion coin cell at 500 mA g-1 after 100 cycles; value from Fig. S4b reported in text.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode with pristine control MOF active material
Measurement source: 400 · Electrochemical performance · Fig. S4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
pristine Ni-HHTP capacity after 100 cycles at 500 mA g-1	187 mA h g-1	—	—	Text Rounded Reported	400 · Electrochemical performance · Fig. S4b

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

Ni-HHTP-160 electrode · Electrode

Comparison Rct from Fig. S7a fitted by equivalent circuit.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode with thermally treated MOF
Measurement source: 401 · Electrochemical kinetics · Fig. S7a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HHTP-160 EIS-derived Na+ diffusion coefficient	9.8x10^-13 cm2 s-1	—	—	SI Table Exact Reported	SI p.5 · Supporting Information · Table S1
charge-transfer resistance Rct	approximately 1724 ohm	—	—	Text Approximate	401 · Electrochemical kinetics · Fig. S7a

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

Ni-HHTP-250 electrode · Electrode

EIS from 10^5 to 10^-2 Hz; fitted in ZView equivalent circuit to extract Rct.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode
Measurement source: 401 · Electrochemical kinetics · Fig. 5f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HHTP-250 EIS-derived Na+ diffusion coefficientMarked as a best value within this paper	1.52x10^-11 cm2 s-1	—	—	SI Table Exact Reported	SI p.5 · Supporting Information · Table S1
charge-transfer resistance RctMarked as a best value within this paper	approximately 723.5 ohm	—	—	Text Approximate	401 · Electrochemical kinetics · Fig. 5f

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

Ni-HHTP-340 electrode · Electrode

Comparison Rct from Fig. S7a fitted by equivalent circuit.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode with thermally treated MOF
Measurement source: 401 · Electrochemical kinetics · Fig. S7a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HHTP-340 EIS-derived Na+ diffusion coefficient	5.6x10^-12 cm2 s-1	—	—	SI Table Exact Reported	SI p.5 · Supporting Information · Table S1
charge-transfer resistance Rct	approximately 908.3 ohm	—	—	Text Approximate	401 · Electrochemical kinetics · Fig. S7a

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

pristine Ni-HHTP electrode · Electrode

Comparison Rct from Fig. S7a fitted by equivalent circuit.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode with pristine control MOF
Measurement source: 401 · Electrochemical kinetics · Fig. S7a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HHTP EIS-derived Na+ diffusion coefficient	1.95x10^-12 cm2 s-1	—	—	SI Table Exact Reported	SI p.5 · Supporting Information · Table S1
charge-transfer resistance Rct	approximately 1474 ohm	—	—	Text Approximate	401 · Electrochemical kinetics · Fig. S7a

Galvanostatic intermittent titration technique (GITT)

Galvanostatic cycling

Ni-HHTP-250 electrode · Electrode

Na+ diffusion coefficients calculated during discharge/charge.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode
Measurement source: 401 · Electrochemical kinetics · Fig. 5e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Na+ diffusion coefficient order of magnitude by GITT	about 10^-11 cm2 s-1	—	—	Text Approximate	401 · Electrochemical kinetics · Fig. 5e

Scan-rate-dependent CV kinetics analysis

Voltammetry

Ni-HHTP-250 electrode · Electrode

CV scan rates from 0.1 to 1.0 mV s-1; b-values and capacitive/diffusion contributions calculated.

Temperature: room temperature
Geometry: 2032 coin cell
Context: composite electrode
Measurement source: 401 · Electrochemical kinetics · Fig. 5a-d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CV b value for peak 1	0.72	—	—	Text Rounded Reported	401 · Electrochemical kinetics · Fig. 5b
CV b value for peak 2	0.84	—	—	Text Rounded Reported	401 · Electrochemical kinetics · Fig. 5b
capacitive-controlled contribution at 0.8 mV s-1	about 77.5%	—	—	Text Approximate	401 · Electrochemical kinetics · Fig. 5c
capacitive-controlled contribution at 1.0 mV s-1Marked as a best value within this paper	83.5%	—	—	Text Rounded Reported	401 · Electrochemical kinetics · Fig. 5d

Scan-rate-dependent CV kinetics analysis

Voltammetry

Ni-HHTP-160 electrode · Electrode

SI Fig. S6 shows CV curves, log(peak current) vs log(scan rate) fits and capacitive/diffusion contribution ratios for comparison electrodes.

Temperature: room temperature
Geometry: 2032 sodium-ion coin cell
Context: Ni-HHTP-160 electrode
Measurement source: SI p.4 · Supporting Information · Fig. S6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HHTP-160 CV b value for peak 1	b=0.61	—	—	Visual Estimate Approximate	SI p.4 · Supporting Information · Fig. S6
Ni-HHTP-160 CV b value for peak 2	b=0.71	—	—	Visual Estimate Approximate	SI p.4 · Supporting Information · Fig. S6
Ni-HHTP-160 capacitive contribution at 1.0 mV s-1	58.9%	—	—	Visual Estimate Approximate	SI p.4 · Supporting Information · Fig. S6

Scan-rate-dependent CV kinetics analysis

Voltammetry

Ni-HHTP-340 electrode · Electrode

SI Fig. S6 shows CV curves, log(peak current) vs log(scan rate) fits and capacitive/diffusion contribution ratios for comparison electrodes.

Temperature: room temperature
Geometry: 2032 sodium-ion coin cell
Context: Ni-HHTP-340 electrode
Measurement source: SI p.4 · Supporting Information · Fig. S6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HHTP-340 CV b value for peak 1	b=0.72	—	—	Visual Estimate Approximate	SI p.4 · Supporting Information · Fig. S6
Ni-HHTP-340 CV b value for peak 2	b=0.87	—	—	Visual Estimate Approximate	SI p.4 · Supporting Information · Fig. S6
Ni-HHTP-340 capacitive contribution at 1.0 mV s-1	77.4%	—	—	Visual Estimate Approximate	SI p.4 · Supporting Information · Fig. S6

Scan-rate-dependent CV kinetics analysis

Voltammetry

pristine Ni-HHTP electrode · Electrode

SI Fig. S6 shows CV curves, log(peak current) vs log(scan rate) fits and capacitive/diffusion contribution ratios for comparison electrodes.

Temperature: room temperature
Geometry: 2032 sodium-ion coin cell
Context: pristine Ni-HHTP electrode
Measurement source: SI p.4 · Supporting Information · Fig. S6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-HHTP CV b value for peak 1	b=0.74	—	—	Visual Estimate Approximate	SI p.4 · Supporting Information · Fig. S6
Ni-HHTP CV b value for peak 2	b=0.72	—	—	Visual Estimate Approximate	SI p.4 · Supporting Information · Fig. S6
Ni-HHTP capacitive contribution at 1.0 mV s-1	66.0%	—	—	Visual Estimate Approximate	SI p.4 · Supporting Information · Fig. S6