Electrochemistry Application — Cellulose Nanofiber @ Conductive Metal-Organic Frameworks for High-Performance Flexible Supercapacitors

6 measurement groups · 48 results

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

Symmetric double-layer supercapacitor CV/GCD cycling on Autolab/GPES

Voltammetry Galvanostatic cycling

CNF@Ni-HITP symmetric supercapacitor · Electrode

Two identical CNF@Ni-HITP nanopaper electrodes with PVA/KCl gel electrolyte, filter-paper separator, and graphite-paper current collectors; potential windows 0-0.7, 0-1.0, and 0-1.4 V studied.

Geometry: Device thickness 0.35 mm; electrode dimensions 1.5 cm x 2.0 cm x 0.005 cm.
Context: Application device using CNF@Ni-HITP composite electrodes.
Measurement source: rendered pages 6-7 / article pp.9583-9584 · Results and Discussion; Methods - Fabrication of Supercapacitors · Figure 4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Supercapacitor areal capacitance within 0-1.0 VMarked as a best value within this paper	96 mF cm^-2 at 0.2 mA cm^-2	—	—	Text Rounded Reported	rendered page 6 / article p.9583 · Results and Discussion · Figure 4c
Device CV response under bending/folding	bending at 90 and 120 degrees or folding at 180 degrees has no influence on CV curves	—	—	Text Qualitative	rendered page 6 / article p.9583 · Results and Discussion · Figure 4e,f
Supercapacitor Coulombic efficiency at 1.4 V window	~89% at 1.4 V	0.89 fraction	visual estimate from SI Figure S23 curve	Visual Estimate Approximate	SI p.21 · Supplementary Results · Figure S23
Supercapacitor cycling retention within 0-0.7 VMarked as a best value within this paper	>99% after 10000 charge-discharge cycles; text also says no obvious reduction	0.99 fraction	lower-bound value from abstract	Text Approximate	rendered pages 1 and 6 / article pp.9578 and 9583 · Abstract; Results and Discussion · Figure 4d
Supercapacitor cycling retention within 0-0.7 V from SI Figure S26Marked as a best value within this paper	99.9% after 10000 cycles	0.999 fraction	figure label	Figure Axis Rounded Reported	SI p.22 · Supplementary Results · Figure S26
Supercapacitor cycling retention within 0-1.0 V	only a 10% reduction after 10000 cycles	0.9 fraction	retention calculated from reported 10% reduction	Calculated From Reported Approximate	rendered page 6 / article p.9583 · Results and Discussion · Figure 4d
Supercapacitor cycling retention within 0-1.0 V from SI Figure S26	90.5% after 10000 cycles	0.905 fraction	figure label	Figure Axis Rounded Reported	SI p.22 · Supplementary Results · Figure S26
Supercapacitor cycling retention within 0-1.4 V	61.2% after 10000 cycles	0.612 fraction	figure label	Figure Axis Rounded Reported	SI p.22 · Supplementary Results · Figure S26
Supercapacitor maximum areal energy densityMarked as a best value within this paper	6.5 mW h cm^-2	—	—	Text Exact Reported	rendered page 6 / article p.9583 · Results and Discussion · Figure S24
Supercapacitor maximum volumetric energy densityMarked as a best value within this paper	185.7 mW h cm^-3	—	—	Text Exact Reported	rendered page 6 / article p.9583 · Results and Discussion · Figure S24
Supercapacitor gravimetric capacitanceMarked as a best value within this paper	141.5 F g^-1 at 0.075 A g^-1	—	—	Text Exact Reported	rendered page 6 / article p.9583 · Results and Discussion · Figure S22
Supercapacitor maximum areal power densityMarked as a best value within this paper	0.013 mW cm^-2	—	—	Text Exact Reported	rendered page 6 / article p.9583 · Results and Discussion · Figure S24
Supercapacitor maximum volumetric power densityMarked as a best value within this paper	0.37 mW cm^-3	—	—	Text Exact Reported	rendered page 6 / article p.9583 · Results and Discussion · Figure S24
Supercapacitor rate retention within 0-0.7 V	59.6% retention when current density increases from 0.2 to 13 mA cm^-2	0.596 fraction	—	Text Exact Reported	rendered page 6 / article p.9583 · Results and Discussion · Figure 4c
Supercapacitor rate retention within 0-1.0 V	50.1% retention when current density increases from 0.2 to 13 mA cm^-2	0.501 fraction	—	Text Exact Reported	rendered page 6 / article p.9583 · Results and Discussion · Figure 4c
Supercapacitor potential-window range tested	0-0.4 to 0-1.4 V	—	—	Text Range	rendered page 6 / article p.9583 · Results and Discussion · Figure 4a
Supercapacitor total device thickness	0.35 mm	—	—	Text Exact Reported	rendered pages 6-7 / article pp.9583-9584 · Results and Discussion; Methods · Figure 4c
Supercapacitor volumetric capacitanceMarked as a best value within this paper	up to 2800 mF cm^-3	2.8 F cm^-3	—	Text Approximate	rendered page 6 / article p.9583 · Results and Discussion · Figure 4c

Electrochemical impedance spectroscopy; CHI 660D-3; Randles equivalent circuit analysis

Impedance spectroscopy

CNF@Ni-HHTP nanopaper · Electrode

CNF@Ni-HHTP electrode in aqueous 3 M KCl; frequency 100 kHz to 0.01 Hz, ac amplitude 5 mV; Table S3 values extracted from Nyquist plots in Figure S21.

Geometry: three-electrode nanopaper electrode
Context: CNF@c-MOF target or CNF-c-MOF direct-mixed control
Measurement source: SI p.19 · Supplementary Results · Table S3; Figure S21

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CNF@Ni-HHTP Charge-transfer resistance	11.2 Ohm	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF@Ni-HHTP Starting frequency for diffusion-dominated response	146.5 Hz	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF@Ni-HHTP Starting frequency for finite-length diffusion dominated response	0.32 Hz	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF@Ni-HHTP High-frequency resistance	1.2 Ohm	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3

Electrochemical impedance spectroscopy; CHI 660D-3; Randles equivalent circuit analysis

Impedance spectroscopy

CNF@Ni-HITP nanopaper · Electrode

CNF@Ni-HITP electrode in aqueous 3 M KCl; frequency 100 kHz to 0.01 Hz, ac amplitude 5 mV; Table S3 values extracted from Nyquist plots in Figure S21.

Geometry: three-electrode nanopaper electrode
Context: CNF@c-MOF target or CNF-c-MOF direct-mixed control
Measurement source: SI p.19 · Supplementary Results · Table S3; Figure S21

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CNF@Ni-HITP Charge-transfer resistanceMarked as a best value within this paper	5.0 Ohm	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF@Ni-HITP Starting frequency for diffusion-dominated response	82.5 Hz	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF@Ni-HITP Starting frequency for finite-length diffusion dominated response	1.0 Hz	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF@Ni-HITP High-frequency resistanceMarked as a best value within this paper	1.1 Ohm	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3

Electrochemical impedance spectroscopy; CHI 660D-3; Randles equivalent circuit analysis

Impedance spectroscopy

CNF-Ni-HHTP direct-mixed paper · Electrode

CNF-Ni-HHTP electrode in aqueous 3 M KCl; frequency 100 kHz to 0.01 Hz, ac amplitude 5 mV; Table S3 values extracted from Nyquist plots in Figure S21.

Geometry: three-electrode nanopaper electrode
Context: CNF@c-MOF target or CNF-c-MOF direct-mixed control
Measurement source: SI p.19 · Supplementary Results · Table S3; Figure S21

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CNF-Ni-HHTP Charge-transfer resistance	80824 Ohm	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF-Ni-HHTP Starting frequency for diffusion-dominated response	0.008 Hz	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF-Ni-HHTP Starting frequency for finite-length diffusion dominated response	Not observed in measured frequency range	—	—	SI Table Qualitative	SI p.19 · Supplementary Results · Table S3
CNF-Ni-HHTP High-frequency resistance	3.5 Ohm	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3

Electrochemical impedance spectroscopy; CHI 660D-3; Randles equivalent circuit analysis

Impedance spectroscopy

CNF-Ni-HITP direct-mixed paper · Electrode

CNF-Ni-HITP electrode in aqueous 3 M KCl; frequency 100 kHz to 0.01 Hz, ac amplitude 5 mV; Table S3 values extracted from Nyquist plots in Figure S21.

Geometry: three-electrode nanopaper electrode
Context: CNF@c-MOF target or CNF-c-MOF direct-mixed control
Measurement source: SI p.19 · Supplementary Results · Table S3; Figure S21

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CNF-Ni-HITP Charge-transfer resistance	72.1 Ohm	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF-Ni-HITP Starting frequency for diffusion-dominated response	46.4 Hz	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF-Ni-HITP Starting frequency for finite-length diffusion dominated response	0.068 Hz	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3
CNF-Ni-HITP High-frequency resistance	2.9 Ohm	—	—	SI Table Exact Reported	SI p.19 · Supplementary Results · Table S3

Three-electrode CV, GCD, and EIS on Autolab/GPES and CHI 660D-3

Impedance spectroscopy Voltammetry Galvanostatic cycling

CNF@Ni-HITP nanopaper · Electrode

Aqueous 3 M KCl electrolyte; Ag/AgCl reference; platinum wire counter; freestanding CNF@c-MOF nanopaper on platinum ring as working electrode without binder or conductive additive; EIS 100 kHz to 0.01 Hz, 5 mV amplitude.

Geometry: Three-electrode cell; 0 to 0.7 V main GCD window; scan rates 5-200 mV s^-1.
Context: CNF@Ni-HITP and CNF@Ni-HHTP target nanopaper electrodes compared with direct-mix CNF-c-MOF controls.
Measurement source: rendered pages 4-5 and 7 / article pp.9581-9582 and 9584 · Results and Discussion; Methods - Electrochemical Characterizations · Figure 3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CNF@Ni-HHTP c-MOF capacitance from CV at 50 mV s^-1	39 F g^-1	—	—	Text Rounded Reported	rendered page 5 / article p.9582 · Results and Discussion · Figure 3e and Figures S18-S19
CNF@Ni-HITP c-MOF capacitance from CV at 50 mV s^-1Marked as a best value within this paper	103 F g^-1	—	—	Text Rounded Reported	rendered page 5 / article p.9582 · Results and Discussion · Figure 3e and Figures S18-S19
CNF-Ni-HHTP direct-mixed paper c-MOF capacitance from CV at 50 mV s^-1	0.04 F g^-1	—	—	Text Rounded Reported	rendered page 5 / article p.9582 · Results and Discussion · Figure 3e
CNF-Ni-HITP direct-mixed paper c-MOF capacitance from CV at 50 mV s^-1	8 F g^-1	—	—	Text Rounded Reported	rendered page 5 / article p.9582 · Results and Discussion · Figure 3e
High-frequency resistance difference between CNF@c-MOF and CNF-c-MOF	approximately 2-3 times lower for CNF@c-MOF nanopapers	—	—	Text Range	rendered page 5 / article p.9582 · Results and Discussion · Figure 3f and Table S3
Charge-transfer resistance difference between CNF@c-MOF and CNF-c-MOF	approximately 6-16000 times lower for CNF@c-MOF nanopapers	—	—	Text Range	rendered page 5 / article p.9582 · Results and Discussion · Figure 3f and Table S3
CNF@Ni-HHTP gravimetric capacitance at low current	75 F g^-1 at 0.2 A g^-1	—	—	Text Rounded Reported	rendered page 5 / article p.9582 · Results and Discussion · Figure 3d
CNF@Ni-HITP gravimetric capacitance at low currentMarked as a best value within this paper	125 F g^-1 at 0.33 A g^-1	—	—	Text Rounded Reported	rendered page 5 / article p.9582 · Results and Discussion · Figure 3c,d
CNF@Ni-HHTP c-MOF areal loading	0.714 mg cm^-2	—	—	Text Exact Reported	rendered page 4 / article p.9581 · Results and Discussion · Figure 3a
CNF@Ni-HITP c-MOF areal loading	0.578 mg cm^-2	—	—	Text Exact Reported	rendered page 4 / article p.9581 · Results and Discussion · Figure 3a
CNF@Ni-HITP electrode capacitance retention on 100-fold current increase	approximately 70% retention from 0.33 to 33 A g^-1	0.7 fraction	—	Text Approximate	rendered page 5 / article p.9582 · Results and Discussion · Figure 3d
CNF@c-MOF electrode GCD current-density range	0.33-33.33 A g^-1	—	—	Text Range	rendered page 5 / article p.9582 · Results and Discussion · Figure 3c
CNF@c-MOF electrode CV scan-rate range	5-200 mV s^-1	—	—	Text Range	rendered page 5 / article p.9582 · Results and Discussion · Figure 3b
CNF@Ni-HITP working potential windowMarked as a best value within this paper	up to 1.4 V	—	—	Text Approximate	rendered page 5 / article p.9582 · Results and Discussion · Figure S14