Electrochemistry Application — Mo-Based crystal POMOFs with a high electrochemical capacitor performance

9 measurement groups · 25 results

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

GCD comparison for control materials

Galvanostatic cycling

PMo@TBAB parent POM control powder · Powder

Parent POM (PMo@TBAB), bare Cu-MOF and compound 1 used as electrode materials for capacitance-performance comparison; exact current density not stated in SI text around Figure S9.

Atmosphere: aqueous electrochemical test conditions presumed same as main electrochemistry section
Geometry: electrode; preparation details for controls not fully specified
Context: control materials compared with compound 1
Measurement source: p005 · Supporting information - Figure S9 · Figure S9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
compound 1 capacitance exceeds parent POM and bare Cu-MOF controlsMarked as a best value within this paper	compound 1 higher than PMo@TBAB and Cu-MOF controls	—	—	Figure Axis Qualitative	p005 · Supporting information - Figure S9 · Figure S9

cyclic voltammetry (CV)

Voltammetry

compound 1-based GCE working electrode · Electrode

Three-electrode cell in 1 M H2SO4; Pt counter and Ag/AgCl reference; -0.05 to 0.55 V vs Ag/AgCl; scan rates 5-100 mV s-1 in main figure and 10-200 mV s-1 in SI.

Temperature: room temperature
Atmosphere: aqueous 1 M H2SO4
Geometry: drop-cast GCE working electrode
Context: composite electrode containing compound 1, acetylene black and Nafion
Measurement source: p005 / article p.13030 · Results and discussion - Electrochemical performance · Figure 6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
compound 1 low-frequency/electrochemical surface area proxy slope from Delta current density vs scan rateMarked as a best value within this paper	slope = 6.18 mF cm-2	0.00618 F cm-2	—	Figure Axis Rounded Reported	p005 / article p.13030 · Electrochemical performance · Figure 7d
compound 1 CV mean peak potential I-I' at 100 mV s-1	40	0.04 V vs Ag/AgCl	—	Text Rounded Reported	p005 / article p.13030 · Electrochemical performance · Figure 6
compound 1 CV mean peak potential II-II' at 100 mV s-1	280	0.28 V vs Ag/AgCl	—	Text Rounded Reported	p005 / article p.13030 · Electrochemical performance · Figure 6
compound 1 CV mean peak potential III-III' at 100 mV s-1	420	0.42 V vs Ag/AgCl	—	Text Rounded Reported	p005 / article p.13030 · Electrochemical performance · Figure 6

cyclic voltammetry (CV)

Voltammetry

compound 2-based GCE working electrode · Electrode

Three-electrode cell in 1 M H2SO4; Pt counter and Ag/AgCl reference; -0.05 to 0.55 V vs Ag/AgCl; scan rates 5-100 mV s-1 in main figure and 10-200 mV s-1 in SI.

Temperature: room temperature
Atmosphere: aqueous 1 M H2SO4
Geometry: drop-cast GCE working electrode
Context: composite electrode containing compound 2, acetylene black and Nafion
Measurement source: p005 / article p.13030 · Results and discussion - Electrochemical performance · Figure 6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
compound 2 low-frequency/electrochemical surface area proxy slope from Delta current density vs scan rate	slope = 4.32 mF cm-2	0.00432 F cm-2	—	Figure Axis Rounded Reported	p005 / article p.13030 · Electrochemical performance · Figure 7d
compound 2 CV mean peak potential I-I' at 100 mV s-1	45	0.045 V vs Ag/AgCl	—	Text Rounded Reported	p005 / article p.13030 · Electrochemical performance · Figure 6
compound 2 CV mean peak potential II-II' at 100 mV s-1	255	0.255 V vs Ag/AgCl	—	Text Rounded Reported	p005 / article p.13030 · Electrochemical performance · Figure 6
compound 2 CV mean peak potential III-III' at 100 mV s-1	410	0.41 V vs Ag/AgCl	—	Text Rounded Reported	p005 / article p.13030 · Electrochemical performance · Figure 6

cycling stability by repeated charge-discharge

Galvanostatic cycling

compound 1-based GCE working electrode · Electrode

1000 charge/discharge cycles at 10 A g-1 in 1 M H2SO4.

Temperature: room temperature
Atmosphere: aqueous 1 M H2SO4
Geometry: drop-cast GCE working electrode
Context: composite electrode containing compound 1, acetylene black and Nafion
Measurement source: p006 / article p.13031 · Results and discussion - Electrochemical performance · Figure 9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
compound 1 capacitance retention after 1000 cycles at 10 A g-1Marked as a best value within this paper	93.5%	93.5 %	—	Text Exact Reported	p006 / article p.13031 · Electrochemical performance · Figure 9

cycling stability by repeated charge-discharge

Galvanostatic cycling

compound 2-based GCE working electrode · Electrode

1000 charge/discharge cycles at 10 A g-1 in 1 M H2SO4.

Temperature: room temperature
Atmosphere: aqueous 1 M H2SO4
Geometry: drop-cast GCE working electrode
Context: composite electrode containing compound 2, acetylene black and Nafion
Measurement source: p006 / article p.13031 · Results and discussion - Electrochemical performance · Figure 9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
compound 2 capacitance retention after 1000 cycles at 10 A g-1	91.1%	91.1 %	—	Text Exact Reported	p006 / article p.13031 · Electrochemical performance · Figure 9

electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

compound 1-based GCE working electrode · Electrode

100 kHz to 0.1 Hz with 5 mV amplitude at open-circuit potential in 1 M H2SO4; equivalent circuit fit with Rs, CPEdl, Rct and Warburg element.

Temperature: room temperature
Atmosphere: aqueous 1 M H2SO4
Geometry: drop-cast GCE working electrode
Context: composite electrode containing compound 1, acetylene black and Nafion
Measurement source: p006 / article p.13031 · Results and discussion - Electrochemical performance · Figure 8; Figure S11; Table S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
compound 1 charge-transfer resistance RctMarked as a best value within this paper	3.33	3.33 ohm	—	SI Table Exact Reported	p012 · Supporting information - Table S4 · Table S4
compound 1 solution/ohmic resistance RsMarked as a best value within this paper	4.93	4.93 ohm	—	SI Table Exact Reported	p012 · Supporting information - Table S4 · Table S4

electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

compound 2-based GCE working electrode · Electrode

100 kHz to 0.1 Hz with 5 mV amplitude at open-circuit potential in 1 M H2SO4; equivalent circuit fit with Rs, CPEdl, Rct and Warburg element.

Temperature: room temperature
Atmosphere: aqueous 1 M H2SO4
Geometry: drop-cast GCE working electrode
Context: composite electrode containing compound 2, acetylene black and Nafion
Measurement source: p006 / article p.13031 · Results and discussion - Electrochemical performance · Figure 8; Figure S11; Table S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
compound 2 charge-transfer resistance Rct	6.26	6.26 ohm	—	SI Table Exact Reported	p012 · Supporting information - Table S4 · Table S4
compound 2 solution/ohmic resistance Rs	5.08	5.08 ohm	—	SI Table Exact Reported	p012 · Supporting information - Table S4 · Table S4

galvanostatic charge-discharge (GCD)

Galvanostatic cycling

compound 1-based GCE working electrode · Electrode

Three-electrode cell in 1 M H2SO4; current densities 3, 5, 8 and 10 A g-1.

Temperature: room temperature
Atmosphere: aqueous 1 M H2SO4
Geometry: drop-cast GCE working electrode
Context: composite electrode containing compound 1, acetylene black and Nafion
Measurement source: p005 / article p.13030 · Results and discussion - Electrochemical performance · Figure 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
compound 1 specific capacitance at 10 A g-1	231.7	231.7 F g-1	—	Text Exact Reported	p005 / article p.13030 · Electrochemical performance · Figure 7
compound 1 specific capacitance at 3 A g-1Marked as a best value within this paper	249.0	249 F g-1	—	Text Exact Reported	p005 / article p.13030 · Electrochemical performance · Figure 7
compound 1 specific capacitance at 5 A g-1	239.2	239.2 F g-1	—	Text Exact Reported	p005 / article p.13030 · Electrochemical performance · Figure 7
compound 1 specific capacitance at 8 A g-1	232.0	232 F g-1	—	Text Exact Reported	p005 / article p.13030 · Electrochemical performance · Figure 7
compound 1 Table 2 specific capacitance at 5 A g-1	239.2	239.2 F g-1	—	Table Exact Reported	p006 / article p.13031 · Electrochemical performance · Table 2

galvanostatic charge-discharge (GCD)

Galvanostatic cycling

compound 2-based GCE working electrode · Electrode

Three-electrode cell in 1 M H2SO4; current densities 3, 5, 8 and 10 A g-1.

Temperature: room temperature
Atmosphere: aqueous 1 M H2SO4
Geometry: drop-cast GCE working electrode
Context: composite electrode containing compound 2, acetylene black and Nafion
Measurement source: p005 / article p.13030 · Results and discussion - Electrochemical performance · Figure 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
compound 2 specific capacitance at 10 A g-1	135.0	135 F g-1	—	Text Exact Reported	p005 / article p.13030 · Electrochemical performance · Figure 7
compound 2 specific capacitance at 3 A g-1	154.5	154.5 F g-1	—	Text Exact Reported	p005 / article p.13030 · Electrochemical performance · Figure 7
compound 2 specific capacitance at 5 A g-1	146.7	146.7 F g-1	—	Text Exact Reported	p005 / article p.13030 · Electrochemical performance · Figure 7
compound 2 specific capacitance at 8 A g-1	136.0	136 F g-1	—	Text Exact Reported	p005 / article p.13030 · Electrochemical performance · Figure 7
compound 2 Table 2 specific capacitance at 5 A g-1	146.7	146.7 F g-1	—	Table Exact Reported	p006 / article p.13031 · Electrochemical performance · Table 2