Electrochemistry Application — Oxygen-Vacancy-Abundant Ferrites on N-Doped Carbon Nanosheets as High-Performance Li-Ion Battery Anodes

6 measurement groups · 33 results

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

CR2025 lithium half-cell galvanostatic charge/discharge, CV and EIS

Impedance spectroscopy Voltammetry Galvanostatic cycling

Composite working electrode formulation · Electrode

Li foil counter/reference; 1.0 M LiPF6 in ethyl carbonate/dimethyl carbonate 1:1 v/v; Celgard 2400 separator; active material/carbon black/PVDF electrode.

Atmosphere: argon-filled glovebox for cell assembly
Geometry: CR2025 coin-type cells; copper foil working electrode; average mass loading 1.2 mg cm-2
Context: General electrochemical setup for all composite and control electrodes.
Measurement source: main p.9, article p.10583 · Electrochemical measurements

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NC control discharge capacity after 100 cycles	184 mAh g-1 after 100 cycles at 200 mA g-1	—	—	Text Exact Reported	main p.6, article p.10580 · Results and Discussion · Figure S6a,b

cyclic voltammetry

Voltammetry

NC@CoFe2O4 powder · Powder

0.2 mV s-1 between 0.01 and 3.0 V vs Li/Li+.

Geometry: CR2025 lithium half-cell
Context: Target composite.
Measurement source: main p.4-5, article pp.10578-10579 · Results and Discussion · Figure 7a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NC@CoFe2O4 anodic oxidation peak	1.63 V	—	—	Text Exact Reported	main p.4, article p.10578 · Results and Discussion · Figure 7a
NC@CoFe2O4 first cathodic reduction peak	0.51 V	—	—	Text Exact Reported	main p.4, article p.10578 · Results and Discussion · Figure 7a
NC@CoFe2O4 first cathodic reduction peak	1.42 V	—	—	Text Exact Reported	main p.4, article p.10578 · Results and Discussion · Figure 7a

cyclic voltammetry

Voltammetry

NC@NiFe2O4 powder · Powder

0.2 mV s-1 between 0.01 and 3.0 V vs Li/Li+.

Geometry: CR2025 lithium half-cell
Context: Target composite.
Measurement source: main p.6, article p.10580 · Results and Discussion · Figure 8a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NC@NiFe2O4 anodic oxidation peak	2.01 V	—	—	Text Exact Reported	main p.6, article p.10580 · Results and Discussion · Figure 8a
NC@NiFe2O4 cathodic Li insertion peak	1.59 V	—	—	Text Exact Reported	main p.6, article p.10580 · Results and Discussion · Figure 8a
NC@NiFe2O4 cathodic reduction peak	1.25 V	—	—	Text Exact Reported	main p.6, article p.10580 · Results and Discussion · Figure 8a

galvanostatic charge/discharge cycling

Galvanostatic cycling

NC@CoFe2O4 powder · Powder

Lithium half-cell cycling at 200, 500 and 2000 mA g-1 depending on test.

Geometry: CR2025 lithium half-cell
Context: Target composite versus CoFe2O4 and Fe2O3 controls.
Measurement source: main p.5-6, article pp.10579-10580 · Results and Discussion · Figure 7c-e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CoFe2O4 discharge capacity after 100 cycles	590 mAh g-1 after 100 cycles at 200 mA g-1	—	—	Text Exact Reported	main p.5, article p.10579 · Results and Discussion · Figure 7c
CoFe2O4 capacity after 500 cycles at 2000 mA g-1	290 mAh g-1 after 500 cycles at 2000 mA g-1	—	—	Text Exact Reported	main p.6, article p.10580 · Results and Discussion · Figure 7e
Fe2O3 discharge capacity after 100 cycles	200 mAh g-1 after 100 cycles at 200 mA g-1	—	—	Text Rounded Reported	main p.5, article p.10579 · Results and Discussion · Figure 7c
NC@CoFe2O4 initial discharge capacity	1600 mAh g-1 at 200 mA g-1	—	—	Text Rounded Reported	main p.4, article p.10578 · Results and Discussion · Figure 7b
NC@CoFe2O4 reversible discharge capacity after 100 cyclesMarked as a best value within this paper	814 mAh g-1 after 100 cycles at 200 mA g-1	—	—	Text Exact Reported	main p.5, article p.10579 · Results and Discussion · Figure 7c
NC@CoFe2O4 capacity after 100 cycles reported in SI Table S1	828 mAh g-1 at 200 mA g-1 after 100 cycles	—	—	SI Table Exact Reported	SI p.9 · Table S1 · Table S1
NC@CoFe2O4 capacity after 500 cycles at 2000 mA g-1Marked as a best value within this paper	623 mAh g-1 after 500 cycles at 2000 mA g-1	—	—	Text Exact Reported	main p.6, article p.10580 · Results and Discussion · Figure 7e
NC@CoFe2O4 capacity after 500 cycles at 500 mA g-1	931 mAh g-1 after 500 cycles at 500 mA g-1	—	—	Text Exact Reported	main p.6, article p.10580 · Results and Discussion · Figure 7e
NC@CoFe2O4 rate capacity at 100 mA g-1	1121 mAh g-1 at 100 mA g-1	—	—	Text Exact Reported	main p.6, article p.10580 · Results and Discussion · Figure 7d
NC@CoFe2O4 rate capacity at 2000 mA g-1	579 mAh g-1 at 2000 mA g-1	—	—	Text Exact Reported	main p.6, article p.10580 · Results and Discussion · Figure 7d
NC@CoFe2O4 Table S1 capacity at 2000 mA g-1 after 500 cycles	626 mAh g-1 at 2000 mA g-1 after 500 cycles	—	—	SI Table Exact Reported	SI p.9 · Table S1 · Table S1

galvanostatic charge/discharge cycling

Galvanostatic cycling

NC@NiFe2O4 powder · Powder

Lithium half-cell cycling at 200, 500 and 2000 mA g-1 depending on test.

Geometry: CR2025 lithium half-cell
Context: Target composite versus NiFe2O4 and Fe2O3 controls.
Measurement source: main p.6-7, article pp.10580-10581 · Results and Discussion · Figure 8c-e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NC@NiFe2O4 initial discharge capacity	1706 mAh g-1 at 200 mA g-1	—	—	Text Exact Reported	main p.6, article p.10580 · Results and Discussion · Figure 8b
NC@NiFe2O4 reversible discharge capacity after 100 cyclesMarked as a best value within this paper	935 mAh g-1 after 100 cycles at 200 mA g-1	—	—	Text Exact Reported	main p.7, article p.10581 · Results and Discussion · Figure 8c
NC@NiFe2O4 capacity after 500 cycles at 2000 mA g-1Marked as a best value within this paper	616 mAh g-1 after 500 cycles at 2000 mA g-1	—	—	Text Exact Reported	main p.7, article p.10581 · Results and Discussion · Figure 8e
NC@NiFe2O4 capacity after 500 cycles at 500 mA g-1	829 mAh g-1 after 500 cycles at 500 mA g-1	—	—	Text Exact Reported	main p.7, article p.10581 · Results and Discussion · Figure 8e
NC@NiFe2O4 rate capacity at 100 mA g-1	1011 mAh g-1 at 100 mA g-1	—	—	Text Exact Reported	main p.7, article p.10581 · Results and Discussion · Figure 8d
NC@NiFe2O4 rate capacity at 2000 mA g-1	587 mAh g-1 at 2000 mA g-1	—	—	Text Exact Reported	main p.7, article p.10581 · Results and Discussion · Figure 8d
NiFe2O4 discharge capacity after 100 cycles	513 mAh g-1 after 100 cycles at 200 mA g-1	—	—	Text Exact Reported	main p.7, article p.10581 · Results and Discussion · Figure 8c
NiFe2O4 capacity after 500 cycles at 2000 mA g-1	278 mAh g-1 after 500 cycles at 2000 mA g-1	—	—	Text Exact Reported	main p.7, article p.10581 · Results and Discussion · Figure 8e
NiFe2O4 rate capacity at 2000 mA g-1	239 mAh g-1 at 2000 mA g-1	—	—	Text Exact Reported	main p.7, article p.10581 · Results and Discussion · Figure 8d
NC@NiFe2O4 Table S1 capacity at 2000 mA g-1 after 500 cycles	615 mAh g-1 at 2000 mA g-1 after 500 cycles	—	—	SI Table Exact Reported	SI p.10 · Table S1 · Table S1

scan-rate-dependent cyclic voltammetry and log(i) versus log(v) fitting

Voltammetry

NC@CoFe2O4 powder · Powder

CV tests at scan rates of 0.2-1.0 mV s-1; b values obtained from i = av^b.

Geometry: CR2025 lithium half-cell
Context: Kinetic comparison of Fe2O3, CoFe2O4, NiFe2O4, NC@CoFe2O4 and NC@NiFe2O4.
Measurement source: main p.7-8, article pp.10581-10582 · Results and Discussion · Figure 10 and Figure S6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CoFe2O4 cathodic/anodic b-value range	0.64-0.66	—	—	Text Range	main p.7, article p.10581 · Results and Discussion · Figure 10a,b
Fe2O3 reduction-process b value	0.43	—	—	Text Exact Reported	main p.7, article p.10581 · Results and Discussion · Figure S6
NC@CoFe2O4 b-value rangeMarked as a best value within this paper	0.74-0.85	—	—	Text Range	main p.8, article p.10582 · Results and Discussion · Figure 10c,d
NC@NiFe2O4 b-value range	0.62-0.73	—	—	Text Range	main p.8, article p.10582 · Results and Discussion · Figure 10g,h
NiFe2O4 cathodic/anodic b-value range	0.59-0.67	—	—	Text Range	main p.7, article p.10581 · Results and Discussion · Figure 10e,f