Electrochemistry Application — Linker Defects Triggering Boosted Oxygen Reduction Activity of Co/Zn-ZIF Nanosheet Arrays for Rechargeable Zn–Air batteries

9 measurement groups · 27 results

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

double-layer capacitance from CV scan-rate series

Voltammetry

D-ZIF linker-deficient nanosheet array on Ni foam · Electrode

CVs at 4, 8, 12, 16 and 20 mV s-1 used to estimate Cdl and ECSA.

Geometry: three-electrode catalyst/Ni foam working electrode
Context: target sample compared with pristine control
Measurement source: 4 · 2. Result and Discussion · Figure 5b; Figure S5

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
D-ZIF double-layer capacitance CdlMarked as a best value within this paper	3.20 mF cm-2	—	—	Figure Axis Rounded Reported	4 · 2. Result and Discussion · Figure 5b
ZIF double-layer capacitance Cdl	3.17 mF cm-2	—	—	Figure Axis Rounded Reported	5 · Figure 5 · Figure 5b

electrochemical impedance spectroscopy

Impedance spectroscopy

D-ZIF linker-deficient nanosheet array on Ni foam · Electrode

EIS at open-circuit voltage with perturbation frequency from 0.01 to 100000 Hz; fitted equivalent circuit.

Geometry: three-electrode catalyst/Ni foam working electrode
Context: target sample compared with pristine control
Measurement source: 5 · Table S1 · Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
D-ZIF ORR charge-transfer resistance RctMarked as a best value within this paper	10.84 ohm	—	—	SI Table Exact Reported	5 · Table S1 · Table S1
D-ZIF EIS fitted Rs	3.343 ohm	—	—	SI Table Exact Reported	5 · Table S1 · Table S1
ZIF ORR charge-transfer resistance Rct	12.22 ohm	—	—	SI Table Exact Reported	5 · Table S1 · Table S1
ZIF EIS fitted Rs	3.293 ohm	—	—	SI Table Exact Reported	5 · Table S1 · Table S1

galvanostatic charge-discharge

Galvanostatic cycling

liquid Zn-air battery with D-ZIF air cathode · Electrode

D-ZIF-ZAB charge/discharge at 0.2-2.0 mA cm-2 and long-cycle test at 2 mA cm-2.

Atmosphere: ambient air
Geometry: liquid Zn-air battery
Context: target D-ZIF application device
Measurement source: 6 · 2. Result and Discussion · Figure 6b-d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
D-ZIF-ZAB charge plateau	1.76 V	—	—	Text Exact Reported	6 · 2. Result and Discussion · Figure 6c
Co-O to Co-O-OH oxidation window during charge	1.49 to 1.68 V	—	—	Text Range	6 · 2. Result and Discussion · Figure 6c
Co-O-OH to Co-O reduction window during discharge	1.68 to 1.45 V	—	—	Text Range	6 · 2. Result and Discussion · Figure 6c
D-ZIF-ZAB cycling duration without fadingMarked as a best value within this paper	almost no fading even after 330 h	—	—	Text Exact Reported	6 · 2. Result and Discussion · Figure 6d
D-ZIF-ZAB discharge plateau	1.10 V	—	—	Text Exact Reported	6 · 2. Result and Discussion · Figure 6c
D-ZIF-ZAB stable voltage gapMarked as a best value within this paper	0.78 V	—	—	Text Exact Reported	6 · 2. Result and Discussion · Figure 6d

liquid Zn-air battery open-circuit voltage

liquid Zn-air battery with D-ZIF air cathode · Electrode

Home-made liquid Zn-air batteries with catalyst/Ni foam air cathodes and Zn foil anode.

Atmosphere: ambient air
Geometry: liquid Zn-air battery
Context: D-ZIF device compared with ZIF device
Measurement source: 4 · 2. Result and Discussion · Figure 6a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
D-ZIF-ZAB open-circuit voltageMarked as a best value within this paper	1.38 V	—	—	Text Exact Reported	4 · 2. Result and Discussion · Figure 6a
ZIF-ZAB open-circuit voltage	1.22 V	—	—	Text Exact Reported	4 · 2. Result and Discussion · Figure 6a

OER CV, LSV, Tafel and chronopotentiometry

Voltammetry Tafel and polarisation analysis Galvanostatic cycling

D-ZIF linker-deficient nanosheet array on Ni foam · Electrode

N2-saturated 0.1 M KOH; OER LSV at 5 mV s-1; chronopotentiometry at 10 mA cm-2 for 10 h.

Atmosphere: N2-saturated electrolyte
Geometry: three-electrode catalyst/Ni foam working electrode
Context: target sample compared with pristine control and Ni foam
Measurement source: 4 · Figure S6 caption · Figure S6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
D-ZIF OER durability at 10 mA cm-2Marked as a best value within this paper	strong durability after 10 h at 10 mA cm-2	—	—	Text Qualitative	4 · 2. Result and Discussion · Figure S6d-f
D-ZIF OER overpotential	370 mV	—	—	Text Exact Reported	4 · 2. Result and Discussion · Figure S6b
D-ZIF OER Tafel slope	58 mV dec-1	—	—	Text Exact Reported	4 · 2. Result and Discussion · Figure S6c
ZIF OER overpotentialMarked as a best value within this paper	360 mV	—	—	Text Exact Reported	4 · 2. Result and Discussion · Figure S6b
ZIF OER Tafel slopeMarked as a best value within this paper	51 mV dec-1	—	—	Text Exact Reported	4 · 2. Result and Discussion · Figure S6c

chronoamperometry

Chronoamperometry

D-ZIF linker-deficient nanosheet array on Ni foam · Electrode

ORR stability at 0.7 V vs RHE in 0.1 M KOH for 10 h.

Geometry: three-electrode catalyst/Ni foam working electrode
Context: target sample compared with pristine control
Measurement source: 4 · 2. Result and Discussion · Figure 4d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
D-ZIF ORR chronoamperometric durabilityMarked as a best value within this paper	almost no activity attenuation over 10 h	—	—	Text Qualitative	4 · 2. Result and Discussion · Figure 4d

ORR CV and linear sweep voltammetry

Voltammetry

D-ZIF linker-deficient nanosheet array on Ni foam · Electrode

Three-electrode system in 0.1 M KOH; CV in N2- and O2-saturated electrolyte at 10 mV s-1; ORR LSV at 5 mV s-1.

Atmosphere: N2- or O2-saturated electrolyte
Geometry: Hg/HgO reference, carbon rod counter, catalyst on nickel foam working electrode (1.0 x 0.5 cm2)
Context: target sample compared with ZIF and Pt/C benchmark
Measurement source: 3 · 2. Result and Discussion · Figure 4a,b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
D-ZIF ORR current density at 0.5 VMarked as a best value within this paper	-1.01 mA cm-2 at 0.5 V	—	—	Figure Axis Rounded Reported	4 · 2. Result and Discussion · Figure 4b
D-ZIF ORR half-wave potentialMarked as a best value within this paper	0.60 V vs RHE	—	—	Text Exact Reported	3 · 2. Result and Discussion · Figure 4b
D-ZIF ORR onset potentialMarked as a best value within this paper	0.86 V vs RHE	—	—	Text Exact Reported	3 · 2. Result and Discussion · Figure 4b
ZIF ORR current density at 0.5 V	-0.21 mA cm-2 at 0.5 V	—	—	Figure Axis Rounded Reported	5 · Figure 4 · Figure 4b

ORR Tafel analysis

Tafel and polarisation analysis

D-ZIF linker-deficient nanosheet array on Ni foam · Electrode

Tafel slopes derived from ORR polarisation in 0.1 M KOH.

Atmosphere: O2-saturated electrolyte
Geometry: three-electrode catalyst/Ni foam working electrode
Context: target sample compared with pristine control
Measurement source: 3 · 2. Result and Discussion · Figure 4c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
D-ZIF ORR Tafel slopeMarked as a best value within this paper	120 mV dec-1	—	—	Text Exact Reported	4 · 2. Result and Discussion · Figure 4c
ZIF ORR Tafel slope	139 mV dec-1	—	—	Text Exact Reported	4 · 2. Result and Discussion · Figure 4c

solid-state Zn-air battery open-circuit voltage and device demonstration

solid-state Zn-air battery with D-ZIF air cathode · Electrode

Solid-state Zn-air battery with D-ZIF catalyst powering an electronic timer or LED light plate.

Atmosphere: ambient air
Geometry: solid-state Zn-air battery
Context: target D-ZIF application device
Measurement source: 4 · Figure S7 caption · Figure S7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
D-ZIF solid-state ZAB open-circuit potential	1.32 V	—	—	Text Exact Reported	6 · 2. Result and Discussion · Figure S7