Yue H., Ren C., Wang G. et al. · Chemistry - A European Journal · 2020 · 10575-10584
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
NC@CoFe2O4 and NC@NiFe2O4 show higher reversible capacities and rate capability than the corresponding ferrite controls and Fe2O3.
Caveat: Some NC@CoFe2O4 capacity values differ slightly between main text and SI Table S1.
main p.9, article p.10583 · Conclusions · Linked to 4 structured results
Oxygen vacancies are inferred from O 1s XPS deconvolution and are claimed to promote faster Li-ion transport and electrochemical performance.
Caveat: OII/OI ratios are described qualitatively as larger but exact ratios are not reported in text.
main p.3-4, article pp.10577-10578 · Results and Discussion · Figures 5f and 6f · Linked to 2 structured results
N-doped carbon nanosheets are derived from Zn-hexamine coordination frameworks and act as a substrate for subsequent ferrite nanoparticle growth.
Caveat: The precursor framework structure is not characterised in detail in this article.
main p.1, article p.10575 · Introduction
Combining oxygen vacancies with conductive N-doped carbon nanosheets lowers interfacial charge-transfer resistance and increases calculated Li-ion diffusion coefficients.
Caveat: The reported diffusion coefficients are calculated from EIS Randles-plot slopes rather than directly measured tracer diffusion.
main p.7, article p.10581 · Results and Discussion · Figure 9 · Linked to 4 structured results
Higher CV b values for NC@CoFe2O4 and NC@NiFe2O4 indicate enhanced pseudocapacitive storage behaviour and faster electrochemical reaction kinetics.
Caveat: The values are reported as peak-wise ranges, and capacitive contribution percentages are not extracted from the text.
main p.8, article p.10582 · Results and Discussion · Figure 10 · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| oxygen-vacancy-rich CoFe2O4 control | CoFe2O4Co and Fe in cubic CoFe2O4 · not applicable | unknown · PristineCubic CoFe2O4 phase assigned by XRD; nanoparticles obtained without NC. | main p.3, article p.10577 · Results and Discussion · Figure S2 and Figure 4 |
| Fe2O3 control | Fe2O3Fe in rhombohedral Fe2O3 · not applicable | unknown · PristineRhombohedral Fe2O3, JCPDS No. 33-0664, prepared as comparison control. | main p.3, article p.10577 · Results and Discussion · Figure S3 and Figure 4 |
| hexamethylenetetramine-zinc coordination framework precursor (HMT-Zn) | not reportedZn from Zn(NO3)2.6H2O · hexamethylenetetramine (HMT) | unknown · PristineWhite HMT-Zn precipitate used as a precursor to N-doped carbon nanosheets; detailed crystal structure not reported in this paper. | main p.2, article p.10576 · Results and Discussion · Figure 1 |
| N-doped carbon nanosheets (NC) | C/N-doped carbonnone in final carbon; Zn precursor removed during calcination · derived from HMT-Zn precursor | 2D · DerivedPorous amorphous N-doped carbon nanosheets, with Raman D and G bands at 1334 and 1590 cm-1. | main p.2, article p.10576 · Results and Discussion · Figure S1 |
| oxygen-vacancy-abundant CoFe2O4 on N-doped carbon nanosheets | NC@CoFe2O4Co and Fe in cubic CoFe2O4 ferrite nanoparticles · not applicable; N-doped carbon support derived from HMT-Zn | unknown · CompositeComposite of CoFe2O4 nanoparticles uniformly deposited on N-doped carbon nanosheets; cubic CoFe2O4 phase assigned by XRD. | main p.2, article p.10576 · Results and Discussion · Figures 2 and 4 |
| oxygen-vacancy-abundant NiFe2O4 on N-doped carbon nanosheets | NC@NiFe2O4Ni and Fe in cubic NiFe2O4 ferrite nanoparticles · not applicable; N-doped carbon support derived from HMT-Zn | unknown · CompositeComposite of NiFe2O4 nanoparticles dispersed on N-doped carbon nanosheets; cubic NiFe2O4 phase assigned by XRD. | main p.3, article p.10577 · Results and Discussion · Figures 3 and 4 |
| oxygen-vacancy-rich NiFe2O4 control | NiFe2O4Ni and Fe in cubic NiFe2O4 · not applicable | unknown · PristineCubic NiFe2O4 phase assigned by XRD; aggregated nanoparticles obtained without NC. | main p.3, article p.10577 · Results and Discussion · Figure S2 and Figure 4 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| CoFe2O4 powder controlresearch_0583__mat__cofe2o4_control | Powder · Pristine Control · Mixed Metal | Prepared by the same solvothermal method without NC. | main p.9, article p.10583 · Experimental Section - Synthesis of NC@MFe2O4 composites |
| Composite working electrode formulationresearch_0583__mat__nc_cofe2o4 | Electrode · Paper Level Unspecified · Composite | Active material/carbon black/PVDF slurry in NMP, stirred 8 h, cast on copper foil, dried 120 C for 12 h, punched into discs.clean copper foil current collector · average mass loading 1.2 mg cm-2 | main p.9, article p.10583 · Electrochemical measurements |
| Fe2O3 powder controlresearch_0583__mat__fe2o3_control | Powder · Pristine Control · Unknown | Prepared by the same solvothermal method and subsequent calcination at 500 C for 2 h. | main p.9, article p.10583 · Experimental Section - Synthesis of NC@MFe2O4 composites |
| HMT-Zn white precipitateresearch_0583__mat__hmt_zn_precursor | Powder · Pristine Control · Pristine Framework | Collected by centrifugation, ethanol washed, dried at 80 C for 12 h before calcination. | main p.9, article p.10583 · Experimental Section - Synthesis of N-doped carbon nanosheets (NC) |
| NC@CoFe2O4 powderresearch_0583__mat__nc_cofe2o4 | Powder · Target Sample · Composite | Solvothermal deposition of CoFe2O4 on NC, followed by washing and drying at 80 C overnight. | main p.2, article p.10576 · Results and Discussion · Figure 2 |
| N-doped carbon nanosheetsresearch_0583__mat__n_doped_carbon_nanosheets | Nanosheet · Composite Component · Derived Carbon | HMT-Zn calcined under Ar at 400 C for 20 min and 900 C for 2 h. | main p.9, article p.10583 · Experimental Section - Synthesis of N-doped carbon nanosheets (NC) · Figure S1 |
| NC@NiFe2O4 powderresearch_0583__mat__nc_nife2o4 | Powder · Target Sample · Composite | Solvothermal deposition of NiFe2O4 on NC, followed by washing and drying at 80 C overnight. | main p.3, article p.10577 · Results and Discussion · Figure 3 |
| NiFe2O4 powder controlresearch_0583__mat__nife2o4_control | Powder · Pristine Control · Mixed Metal | Prepared by the same solvothermal method without NC. | main p.9, article p.10583 · Experimental Section - Synthesis of NC@MFe2O4 composites |