Electrochemistry Application — Conductive MOFs as bifunctional oxygen electrocatalysts for all-solid-state Zn-air batteries

8 measurement groups · 45 results

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

double-layer capacitance from CV

Voltammetry

[Ni5.7Ru0.3(HHTP)3(H2O)x]n catalyst layer on GC-RDE · Electrode

Cdl estimated from CV curves in a non-Faradaic region of 0.95-1.05 V vs RHE at scan rates 20-100 mV s-1.

Atmosphere: 0.1 M KOH
Geometry: GC-RDE catalyst layer
Context: Ru-doped MOF compared with pristine Ni-HHTP
Measurement source: 14-15 · Additional Figures · Fig. S19-S20

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
double-layer capacitance, Ni-HHTP	126 uF cm-2 in Fig. S20; main text says 126 mF cm-2	—	—	Figure Axis Exact Reported	15 · Additional Figures · Fig. S20
double-layer capacitance, Ru-doped Ni-HHTPMarked as a best value within this paper	139 uF cm-2 in Fig. S20; main text says 139 mF cm-2	—	—	Figure Axis Exact Reported	15 · Additional Figures · Fig. S20

liquid Zn-air battery discharge, polarization and cycling

[Ni5.7Ru0.3(HHTP)3(H2O)x]n liquid Zn-air battery air cathode · Electrode

Primary liquid Zn-air battery with [Ni5.7Ru0.3(HHTP)3(H2O)x]n cathode and 6 M KOH electrolyte; rechargeable configuration used 6 M KOH + 0.2 M Zn(OAc)2.

Atmosphere: air cathode
Geometry: button-type Zn-air battery
Context: MOF catalyst air cathode composite
Measurement source: 3-4 · main text · Fig. 4, Fig. S22-S28, Table S3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
primary liquid Zn-air specific capacity	544 mA h gZn-1	—	—	Text Exact Reported	3 · main text · Fig. S26
voltage at high low-current inset load	above 1.0 V when current density is as high as 20 mA cm-2	20 mA cm-2	—	Text Approximate	3 · main text · Fig. 4c inset
primary liquid Zn-air open-circuit voltage	1.37 V	—	—	Text Exact Reported	3 · main text · Fig. S23
primary liquid Zn-air maximum power density	76 mW cm-2 at 120 mA cm-2	120 mA cm-2	—	Text Exact Reported	3 · main text · Fig. 4c
rechargeable liquid Zn-air cycling stability	110 cycles / 2 mA cm-2	2 mA cm-2	—	SI Table Exact Reported	22 · Additional Figures · Table S3
rechargeable liquid Zn-air final charge potential after cycling	1.72 V after 110 cycles (17 h)	110 cycles	—	Text Exact Reported	4 · main text · Fig. S28
rechargeable liquid Zn-air final discharge potential after cycling	1.0 V after 110 cycles (17 h)	110 cycles	—	Text Rounded Reported	4 · main text · Fig. S28, Table S3
rechargeable liquid Zn-air initial charge potential	1.7 V	—	—	Text Rounded Reported	4 · main text · Fig. S28
rechargeable liquid Zn-air initial discharge potential	1.1 V	—	—	Text Rounded Reported	4 · main text · Fig. S28

OER LSV and chronoamperometry

Voltammetry Chronoamperometry

[Ni5.7Ru0.3(HHTP)3(H2O)x]n catalyst layer on GC-RDE · Electrode

Three-electrode cell in O2/N2 saturated 0.1 M KOH; potentials iR corrected and converted to RHE.

Atmosphere: O2/N2 saturated electrolyte
Geometry: GC-RDE working electrode, Pt wire counter, Hg/HgO reference
Context: MOF catalyst layer on GC-RDE
Measurement source: 3-4 · Electrochemical characterizations · Fig. 3a-b, Fig. S13-S14

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER potential at 10 mA cm-2Marked as a best value within this paper	1.62 V at 10.0 mA cm-2	10 mA cm-2	—	Text Exact Reported	2 · main text · Fig. 3a
OER onset potentialMarked as a best value within this paper	1.52 V	—	—	Text Exact Reported	2 · main text · Fig. 3a
OER current retention after continuous potentiostatic polarisationMarked as a best value within this paper	85.5% after 30000 s	30000 s	—	Text Exact Reported	3 · main text · Fig. 3b
OER Tafel slope, Ni-HHTP	100 mV dec-1	—	—	Figure Axis Exact Reported	12 · Additional Figures · Fig. S14
OER Tafel slope, Ni5.94Ru0.06	101 mV dec-1	—	—	Figure Axis Exact Reported	12 · Additional Figures · Fig. S14
OER Tafel slope, Ni5.82Ru0.18	118 mV dec-1	—	—	Figure Axis Exact Reported	12 · Additional Figures · Fig. S14
OER Tafel slopeMarked as a best value within this paper	61 mV dec-1	—	—	Text Exact Reported	3 · main text · Fig. S14
OER Tafel slope, Ni5.4Ru0.6	79 mV dec-1	—	—	Figure Axis Exact Reported	12 · Additional Figures · Fig. S14

OER LSV/Tafel comparator

Voltammetry Tafel and polarisation analysis

commercial RuO2 OER electrode · Electrode

Commercial RuO2 comparator for OER in 0.1 M KOH.

Geometry: electrode catalyst layer
Context: commercial comparator
Measurement source: 3 · main text · Fig. S13-S14

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER current retention after continuous potentiostatic polarisation	73.6% after 30000 s	30000 s	—	Text Exact Reported	3 · main text · Fig. 3b
OER Tafel slope, RuO2 comparatorMarked as a best value within this paper	58.5 mV dec-1	—	—	Text Exact Reported	3 · main text · Fig. S14

ORR LSV/Tafel comparator

Voltammetry Tafel and polarisation analysis

commercial Pt/C ORR electrode · Electrode

Commercial Pt/C comparator for ORR in 0.1 M KOH.

Atmosphere: O2 saturated electrolyte
Geometry: electrode catalyst layer
Context: commercial comparator
Measurement source: 3 · main text · Fig. S17

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR current retention after chronoamperometry	84.1% after 30000 s	30000 s	—	Text Exact Reported	3 · main text · Fig. 3d
ORR half-wave potential, Pt/C comparatorMarked as a best value within this paper	0.8 V	—	—	Text Rounded Reported	3 · main text · Fig. S17
ORR Tafel slope, Pt/C comparator	124 mV dec-1	—	—	Figure Axis Exact Reported	13 · Additional Figures · Fig. S17

ORR CV, LSV, chronoamperometry and RRDE

Voltammetry Chronoamperometry

[Ni5.7Ru0.3(HHTP)3(H2O)x]n catalyst layer on GC-RDE · Electrode

ORR in O2-saturated 0.1 M KOH; CV sweep 10 mV s-1 after gas purging; RRDE electron-transfer number from disk/ring currents.

Atmosphere: O2 saturated electrolyte
Geometry: GC-RDE/RRDE
Context: MOF catalyst layer on GC-RDE
Measurement source: 3-4 · Electrochemical characterizations · Fig. 3c-d, Fig. S15-S18

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
KSCN effect on ORR activity	no obvious attenuation after 1 mM KSCN addition	—	—	Text Qualitative	3 · main text · Fig. S21
methanol crossover test addition volume	0.6 mL methanol after 200 s	200 s	—	Text Exact Reported	3 · main text · Fig. 3d inset
ORR current retention after chronoamperometryMarked as a best value within this paper	88.6% after 30000 s	30000 s	—	Text Exact Reported	3 · main text · Fig. 3d
ORR half-wave potentialMarked as a best value within this paper	0.68 V	—	—	Text Exact Reported	3 · main text · Fig. 3c
ORR Tafel slope, Ni-HHTP	76 mV dec-1	—	—	Figure Axis Exact Reported	13 · Additional Figures · Fig. S16
ORR Tafel slope, Ni5.94Ru0.06	86 mV dec-1	—	—	Figure Axis Exact Reported	13 · Additional Figures · Fig. S16
ORR Tafel slope, Ni5.82Ru0.18	70 mV dec-1	—	—	Figure Axis Exact Reported	13 · Additional Figures · Fig. S16
ORR Tafel slopeMarked as a best value within this paper	64 mV dec-1	—	—	Text Exact Reported	3 · main text · Fig. S16
ORR Tafel slope, Ni5.4Ru0.6	73 mV dec-1	—	—	Figure Axis Exact Reported	13 · Additional Figures · Fig. S16
ORR electron transfer number	about 3.5	—	—	Text Approximate	3 · main text · Fig. S18

liquid Zn-air battery comparator discharge and capacity

commercial Pt/C ORR electrode · Electrode

Primary liquid Zn-air battery using Pt/C cathode comparator.

Atmosphere: air cathode
Geometry: Zn-air battery
Context: commercial comparator cathode
Measurement source: 3 · main text · Fig. S24-S26

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
primary liquid Zn-air specific capacity, Pt/CMarked as a best value within this paper	628 mA h gZn-1	—	—	Text Exact Reported	3 · main text · Fig. S26
primary liquid Zn-air maximum power density, Pt/CMarked as a best value within this paper	108 mW cm-2	—	—	Text Exact Reported	3 · main text · Fig. S25

all-solid-state Zn-air battery discharge, polarization and cycling

[Ni5.7Ru0.3(HHTP)3(H2O)x]n all-solid-state Zn-air battery air electrode · Electrode

Sandwich all-solid-state Zn-air battery with Zn powder anode, MOF-supported air diffusion cathode, and PVA/KOH/Zn(OAc)2 gel electrolyte.

Atmosphere: air cathode
Geometry: button-type all-solid-state Zn-air battery
Context: MOF catalyst air electrode composite
Measurement source: 4 · main text · Fig. 4d-e, Fig. S29-S32

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
all-solid-state Zn-air specific capacityMarked as a best value within this paper	654 mA h gZn-1 at 5 mA cm-2	5 mA cm-2	—	Text Exact Reported	4 · main text · Fig. S31
all-solid-state rechargeable cycling durabilityMarked as a best value within this paper	no obvious performance degradation after 200 cycles	2 mA cm-2	—	Text Exact Reported	4 · main text · Fig. 4e
all-solid-state Zn-air discharge voltage	1.17 V at 2 mA cm-2	2 mA cm-2	—	Text Exact Reported	4 · main text · Fig. 4d
all-solid-state rechargeable initial charge voltage	1.83 V	—	—	Text Exact Reported	4 · main text · Fig. 4e
all-solid-state rechargeable initial discharge voltage	1.07 V	—	—	Text Exact Reported	4 · main text · Fig. 4e
solid rechargeable air electrode MOF mass loading	2 mg/cm2	—	—	Text Exact Reported	4 · Zn-air batteries
all-solid-state Zn-air open-circuit voltage	1.332 V	—	—	Text Exact Reported	4 · main text · Fig. S29
all-solid-state Zn-air maximum power densityMarked as a best value within this paper	98.3 mW cm-2 at 148 mA cm-2	148 mA cm-2	—	Text Exact Reported	4 · main text · Fig. S32
all-solid-state Zn-air stable discharge duration	no significant change within 20 h	2 mA cm-2	—	Text Exact Reported	4 · main text · Fig. 4d