Application RelevanceSupport assessment: High
The ZnCo2O4@NC/CTs electrode is positioned as a dual-function flexible electrode for asymmetric supercapacitors and oxygen evolution electrocatalysis.
653 · Abstract · Linked to 3 structured results
Primary studyCore evidenceTransport Physics
3D self-branched zinc-cobalt Oxide@N-doped carbon hollow nanowall arrays for high-performance asymmetric supercapacitors and oxygen electrocatalysis
Kong D., Wang Y., Huang S. et al. · Energy Storage Materials · 2019 · 653-663
10materials
14samples
11synthesis routes
15measurements
61results
6claims and caveats
Evidence map
Open a family to keep every result attached to its sample, method and conditions.
Author interpretations and caveats
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
CaveatSupport assessment: High
The office SI text layer omits figure/table visual bodies, but the supplied rendered SI surrogate contains readable captions and Tables S1-S2, so SI table values are extracted from the rendered surrogate rather than queued as missing.
Caveat: Individual SI plot curves not numerically digitised unless values are also reported in text, captions or tables.
SI p.28-SI p.30 · Part 4 Tables · Tables S1-S2 · Linked to 2 structured results
Structure Property LinkSupport assessment: High
The 3D self-branched hollow ZnCo2O4@NC architecture improves capacitance and OER by increasing electrolyte-accessible surface area, shortening ion diffusion, reducing resistance and stabilising the interface.
Caveat: Porosity is described by microscopy; no BET number is reported.
661 · 3. Results and discussion · Fig. 6a · Linked to 5 structured results
Synthesis MechanismSupport assessment: High
Vertically aligned 2D Co-MOF nanowall arrays act as precursors and self-sacrificing templates; Zn2+ exchange/etching creates ZnCo-MOF hollow precursor nanoflakes, and annealing converts ligands to N-doped carbon and metal precursor to porous ZnCo2O4.
655 · 3. Results and discussion · Fig. 1 · Linked to 3 structured results
Transport MechanismSupport assessment: Medium
The hollow N-doped carbon nanowall core and carbon textile support are claimed to provide direct mechanical/electrical connection and fast ion/electron pathways.
Caveat: No four-probe electrical conductivity value is reported; the support comes from electrochemical impedance/IR drop and qualitative structural arguments.
661 · 3. Results and discussion · Fig. 6a · Linked to 2 structured results
Transport MechanismSupport assessment: Medium
Zn2+ substitution in spinel ZnCo2O4 reduces the calculated band gap relative to Co3O4 and introduces in-gap states, supporting improved electronic conduction.
Caveat: This is a DFT-supported conductivity inference rather than a direct conductivity measurement.
661 · 3. Results and discussion · Fig. 6c · Linked to 2 structured results
Material identities
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| ZnCo2O4@NC//Fe3O4@r-GO asymmetric supercapacitor | ZnCo2O4@NC//Fe3O4@r-GOZn, Co and Fe oxide components · none after MOF-derived annealing | unknown · CompositeQuasi-solid-state asymmetric supercapacitor pairing a ZnCo2O4@NC/CTs cathode with an Fe3O4@r-GO/CTs anode. | 658 · 3. Results and discussion · Fig. 4 |
| Co3O4 electronic-structure model | Co3O4Co · none | 3D · Model SystemDFT model of cubic spinel Co3O4 used as conductivity/band-gap comparator. | 661 · 3. Results and discussion · Fig. 6b-c |
| Co3O4@N-doped carbon nanowall arrays | Co3O4@NCCo · N-doped carbon derived from Co-MOF | 2D · DerivedPorous Co3O4 nanoparticles/nanowalls coated with thin N-doped carbon on carbon textiles. | 654 · 2.3. Preparation of 3D self-branched ZnCo2O4@NC/CTs |
| Co-MOF nanowall arrays | Co-MOFCo · 2-methylimidazole | 2D · PristineVertically aligned 2D cobalt-based MOF solid nanowall arrays grown on carbon textiles. | 654 · 2.1. Preparation of Co-MOF/CTs |
| carbon textiles | C | unknown · PristineFlexible conductive carbon textile substrate and bare-electrode control. | 654 · 2.1. Preparation of Co-MOF/CTs |
| Fe3O4@r-GO nanocomposites | Fe3O4@r-GOFe · none | unknown · CompositeFe3O4/reduced-graphene-oxide nanocomposite used as the ASC negative electrode. | Part 1 Supplementary method |
| 3D hollow ZnCo2O4 nanowalls | ZnCo2O4Zn and Co · none after oxidation | 3D · DerivedControl spinel ZnCo2O4 nanowall arrays on carbon textiles obtained by air oxidation of ZnCo-MOF/CTs. | 654 · 2.3. Preparation of 3D self-branched ZnCo2O4@NC/CTs |
| ZnCo2O4 electronic-structure model | ZnCo2O4Zn and Co · none | 3D · Model SystemDFT model of spinel ZnCo2O4 used to evaluate Zn2+ substitution and electronic states. | 661 · 3. Results and discussion · Fig. 6b-c |
| 3D self-branched ZnCo2O4@N-doped carbon hollow nanowall arrays | ZnCo2O4@NCZn and Co in spinel zinc-cobalt oxide · N-doped carbon derived from 2-methylimidazole-containing Co-MOF | 3D · DerivedPorous ZnCo2O4 nanoflake shell anchored on hollow N-doped carbon nanowall cores on carbon textiles. | 655 · 3. Results and discussion · Fig. 1 |
| ZnCo-MOF hollow precursor nanowall arrays | ZnCo-MOFZn and Co · 2-methylimidazole-derived organic ligand framework | 3D · DerivedZn2+ ion-exchanged/etched 3D self-branched hollow precursor nanowalls with ZnCo precursor nanoflakes. | 655 · 3. Results and discussion · Fig. 1 |
Sample register
Sample form, processing state and composition status define the context for measurements.
Show 14 sample records
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| ZnCo2O4@NC//Fe3O4@r-GO ASC deviceresearch_0083__mat__mat_asc_device | Electrode · Composite Sample · Composite | Face-to-face all-solid-state ASC assembled with PVA-KOH gel electrolyte/separator and Ecoflex encapsulation.carbon textiles in both electrodes · total device about 1.0 mm; gel electrolyte about 60 um | 658 · 3. Results and discussion · Fig. 4b |
| Co3O4 DFT modelresearch_0083__mat__mat_co3o4_model | Model · Model System · Model | DFT spinel model with PBE and Hubbard U for Co. | Computational methods |
| Co3O4@NC/CTsresearch_0083__mat__mat_co3o4_nc | Electrode · Pristine Control · Composite | Co-MOF/CTs treated by the same carbonization/oxidation sequence used for ZnCo2O4@NC/CTs.flexible carbon textiles | 654 · 2.3. Preparation of 3D self-branched ZnCo2O4@NC/CTs |
| Co-MOF nanowall arrays on Fe foil, Ni foam and graphite paperresearch_0083__mat__mat_co_mof | Thin Film · Pristine Control · Pristine Framework | solution-grown Co-MOF nanowall arrays on alternative substratesFe foil; Ni foam; graphite paper | SI p.8 · Part 3 Figures · Fig. S4 |
| Co-MOF/CTsresearch_0083__mat__mat_co_mof | Electrode · Pristine Control · Pristine Framework | Room-temperature solution-grown Co-MOF nanowall arrays on acid-pretreated CTs.flexible carbon textiles · Co-MOF nanowall average thickness around 185 nm | 655 · 3. Results and discussion · Fig. S2b-c |
| Co-MOF/CTs growth-time series (1.5, 3.0, 4.5 and 6.0 h)research_0083__mat__mat_co_mof | Electrode · Pristine Control · Pristine Framework | room-temperature solution growth for varied ageing durationscarbon textiles | SI p.12 · Part 3 Figures · Fig. S8 |
| bare carbon textiles (CTs)research_0083__mat__mat_cts | Electrode · Pristine Control · Derived Carbon | Nitric-acid pretreated CT substrate; also used as bare OER/control electrode.carbon textiles · 0.033 cm | 654 · 2.1. Preparation of Co-MOF/CTs |
| Fe3O4@r-GO/CTs anoderesearch_0083__mat__mat_fe3o4_rgo | Electrode · Composite Sample · Composite | Fe3O4@r-GO, acetylene black and PVDF slurry coated onto CTs and vacuum dried at 120 C overnight.carbon textiles · 0.033 cm substrate thickness | Part 1 Supplementary method |
| Fe3O4@r-GO nanocomposite powderresearch_0083__mat__mat_fe3o4_rgo | Powder · Composite Component · Composite | Solvothermal Fe3O4/r-GO product annealed at 450 C in Ar. | Part 1 Supplementary method |
| ZnCo2O4/CTsresearch_0083__mat__mat_znco2o4 | Electrode · Pristine Control · Mixed Metal | ZnCo-MOF/CTs oxidized in air at 400 C for 2 h.flexible carbon textiles | 654 · 2.3. Preparation of 3D self-branched ZnCo2O4@NC/CTs |
| ZnCo2O4 DFT modelresearch_0083__mat__mat_znco2o4_model | Model · Model System · Model | DFT spinel model with PBE and Hubbard U for Co. | Computational methods |
| 3D self-branched ZnCo2O4@NC/CTsresearch_0083__mat__mat_znco2o4_nc | Electrode · Target Sample · Composite | ZnCo-MOF/CTs carbonized in Ar at 700 C and oxidized in air at 250 C.flexible carbon textiles | 654 · 2.3. Preparation of 3D self-branched ZnCo2O4@NC/CTs |
| ZnCo-MOF/CTsresearch_0083__mat__mat_znco_mof | Electrode · Composite Component · Mixed Metal | Co-MOF/CTs after 30 min Zn(NO3)2 ethanol ion-exchange/etching.flexible carbon textiles | 654 · 2.2. Preparation of ZnCo-MOF/CTs |
| ZnCo-MOF/CTs etching-time series (10, 20, 30 and 60 min)research_0083__mat__mat_znco_mof | Electrode · Pristine Control · Mixed Metal | Zn2+ ion-exchange/etching of Co-MOF/CTs for varied timescarbon textiles | SI p.10 · Part 3 Figures · Fig. S6 |