Electrochemistry Application — High-performance hybrid supercapacitors enabled by CoTe@CoFeTe double-shelled nanocubes

5 measurement groups · 34 results

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

CV and GCD

Voltammetry Galvanostatic cycling

Activated carbon electrode · Electrode

Activated carbon electrode tested from 1 to 54 A g-1 and 10 to 50 mV s-1.

Geometry: electrode
Context: anode component
Measurement source: 4599 · 3 Results and discussion · Fig. S17

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
AC specific capacitance at 1 A g-1	187.70 F g-1	187.7 F g-1	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. S17c
AC specific capacitance at 54 A g-1	142.50 F g-1	142.5 F g-1	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. S17c

Two-electrode hybrid supercapacitor CV/GCD/Ragone/cycling

Voltammetry Galvanostatic cycling

AC//CoTe@CoFeTe device · Electrode

AC anode and CoTe@CoFeTe cathode in 6 M KOH; voltage window optimised to 1.60 V.

Atmosphere: 6 M KOH electrolyte
Geometry: two-electrode hybrid device
Context: application device
Measurement source: 4599 · 3 Results and discussion · Fig. 5; Fig. S18-S19

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Device specific capacity at 1 A g-1Marked as a best value within this paper	291 C g-1	291 C g-1	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. 5d
Device specific capacity at 27 A g-1	231 C g-1	231 C g-1	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. 5d
Device specific capacity at 3 A g-1	276.7 C g-1	276.7 C g-1	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. 5d
Device specific capacity at 54 A g-1	199.4 C g-1	199.4 C g-1	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. 5d
Device specific capacity at 9 A g-1	260 C g-1	260 C g-1	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. 5d
Device coulombic efficiency after cycling	98.65%	98.65 %	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. 5f
Device cycling capacity retention	88.25% after 10000 cycles at 9 A g-1	88.25 %	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. 5f
Device energy densityMarked as a best value within this paper	64.66 W h kg-1 at 808.25 W kg-1	64.66 W h kg-1	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. 5e
Device power density at 64.66 W h kg-1	808.25 W kg-1	808.25 W kg-1	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. 5e
Device rate capability	68.52%	68.52 %	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. 5d
AC//CoTe@CoFeTe operating voltage windowMarked as a best value within this paper	1.60 V	1.6 V	—	Text Exact Reported	4599 · 3 Results and discussion · Fig. S19

SI benchmark table

CoTe@CoFeTe working electrode · Electrode

Table S1 comparison of CoTe@CoFeTe with previously reported electrode materials.

Context: target sample benchmarking
Measurement source: 10 · Table S1 · Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
SI Table S1 CoTe@CoFeTe capacity	1312 at 1 A g-1	1312 C g-1	—	SI Table Exact Reported	10 · Table S1 · Table S1
SI Table S1 CoTe@CoFeTe energy density	64.66 Wh kg-1	64.66 W h kg-1	—	SI Table Exact Reported	10 · Table S1 · Table S1

CV and GCD, three-electrode cell

Voltammetry Galvanostatic cycling

control electrodes on nickel foam · Electrode

6 M KOH; Hg/HgO reference; Pt foil counter; active material/acetylene black/PTFE 8:1:1 on nickel foam; 4.0 mg loading.

Geometry: three-electrode
Context: ZIF67, ZIF67@CoFe-PBA, and Co3O4@CoFe2O4 controls
Measurement source: 4593 · 2.7 · Fig. 3; Fig. S11-S13

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co3O4@CoFe2O4 specific capacity at 1 A g-1	712 C g-1 at 1 A g-1	712 C g-1	—	Text Exact Reported	4595 · 3 Results and discussion · Fig. 3c
ZIF67 specific capacity at 1 A g-1	184 C g-1 at 1 A g-1	184 C g-1	—	Text Exact Reported	4595 · 3 Results and discussion · Fig. 3c
ZIF67@CoFe-PBA specific capacity at 1 A g-1	400.5 C g-1 at 1 A g-1	400.5 C g-1	—	Text Exact Reported	4595 · 3 Results and discussion · Fig. 3c
Co3O4@CoFe2O4 cycling retention	74.45% after 10000 cycles at 9 A g-1	74.45 %	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. S13
ZIF67 cycling retention	24.5% after 10000 cycles at 9 A g-1	24.5 %	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. S13
ZIF67@CoFe-PBA cycling retention	58.5% after 10000 cycles at 9 A g-1	58.5 %	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. S13
Co3O4@CoFe2O4 capacity retention at 54 A g-1	62.9%	62.9 %	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 4b
ZIF67 capacity retention at 54 A g-1	26%	26 %	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 4b
ZIF67@CoFe-PBA capacity retention at 54 A g-1	50%	50 %	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 4b

CV and GCD, three-electrode cell

Voltammetry Galvanostatic cycling

CoTe@CoFeTe working electrode · Electrode

6 M KOH; Hg/HgO reference; Pt foil counter; CoTe@CoFeTe electrode on nickel foam.

Geometry: three-electrode
Context: target electrode
Measurement source: 4595 · 3 Results and discussion · Fig. 3; Fig. 4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CoTe@CoFeTe anodic b value	0.5176	0.5176	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 3f
CoTe@CoFeTe cathodic b value	0.5192	0.5192	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 3f
CoTe@CoFeTe specific capacity at 1 A g-1Marked as a best value within this paper	1312 C g-1 at 1 A g-1	1312 C g-1	—	Text Exact Reported	4595 · 3 Results and discussion · Fig. 3c
CoTe@CoFeTe specific capacity at 27 A g-1	1114 C g-1	1114 C g-1	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 4b
CoTe@CoFeTe specific capacity at 3 A g-1	1295 C g-1	1295 C g-1	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 4b
CoTe@CoFeTe specific capacity at 54 A g-1	1049.6 C g-1	1049.6 C g-1	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 4b
CoTe@CoFeTe specific capacity at 9 A g-1	1215 C g-1	1215 C g-1	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 4b
CoTe@CoFeTe coulombic efficiency after cyclingMarked as a best value within this paper	99.25% after 10000 cycles	99.25 %	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 4d
CoTe@CoFeTe cycling capacity retentionMarked as a best value within this paper	92.35% after 10000 cycles at 9 A g-1	92.35 %	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 4d
CoTe@CoFeTe capacity retention at 54 A g-1Marked as a best value within this paper	80% of initial capacity at 54 A g-1	80 %	—	Text Exact Reported	4598 · 3 Results and discussion · Fig. 4b