Primary studyCore evidenceTransport Physics

Morphologies of thienyl based bimetallic metal-organic frameworks controlled by solvents for high specific capacitance supercapacitor

Song S., Ma X., Zhang B. et al. · Journal of Energy Storage · 2022 · 103627

3materials
9samples
5synthesis routes
18measurements
99results
6claims and caveats

Evidence map

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Author interpretations and caveats

Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.

Application RelevanceSupport assessment: High

The E-NCT MOF//AC asymmetric supercapacitor delivers 29.34 Wh kg^-1 at 377.27 W kg^-1 and retains 73.6% capacitance after 10000 cycles.

Caveat: Device performance uses a composite electrode and activated carbon counter-electrode; mass-balancing equation is reported, but detailed electrode loading is not provided.

10 · 4. Conclusion · Linked to 3 structured results

CaveatSupport assessment: High

The paper is relevant to conductive-MOF transport physics through EIS/electrochemical electron-transfer discussion, but it does not report direct electrical conductivity, carrier mobility, Hall, Seebeck or thermoelectric measurements.

3 · 2.4. Electrochemical measurements · Linked to 2 structured results

Structure Property LinkSupport assessment: High

Ethanol synthesis gives sheet-like E-NCT MOF, which provides more electron-transport paths and ion-migration active sites than the lower-protonation solvent variants, producing the highest capacitance.

Caveat: Electrode capacitance data are measured on MOF/acetylene-black/PTFE composites on nickel foam, not on binder-free pristine powder.

1 · Abstract · Linked to 4 structured results

Synthesis MechanismSupport assessment: Medium

Increasing solvent protonation changes NCT MOF morphology from spherical/block-like particles toward thinner flakes/sheets by changing ligand solubility, metal coordination and nucleation rate.

Caveat: Mechanism is interpretive and based on morphology/XRD trends, not direct in situ nucleation measurements.

6 · 3.1. Structural and morphology characterization · Linked to 3 structured results

Transport MechanismSupport assessment: Medium

Mixed Ni and Co valence states provide redox-active sites and support fast Faradaic reactions, improving capacitance performance.

Caveat: XPS valence-state assignment is ex situ; direct electronic conductivity is not measured.

6 · 3.1. Structural and morphology characterization · Figure 5 · Linked to 6 structured results

Transport MechanismSupport assessment: Medium

The thiophene ligand's electron-rich planar semiconductor character is proposed to increase electrochemical activity and improve electron transport relative to the terephthalate comparison.

Caveat: The paper infers improved electron transport from electrochemical behaviour and EIS; no direct conductivity or mobility measurement is reported.

10 · 3.3. Electrochemical properties of the asymmetric supercapacitor · Linked to 4 structured results

Material identities

Names and aliases are kept exactly within the paper’s own identity model.

MaterialCompositionStructure contextSource
E-NCT MOF//AC asymmetric supercapacitorNot specifiedNi/Co MOF positive electrode; activated carbon negative electrode · 2,5-thiophene dicarboxylic acid in E-NCT MOF2D · CompositeTwo-electrode asymmetric supercapacitor assembled from E-NCT MOF and activated carbon.9 · 3.3. Electrochemical properties of the asymmetric supercapacitor · Figure 8
Thienyl Ni/Co bimetallic MOF (NCT MOF)Not specifiedNi and Co bimetal nodes from Ni(NO3)2.6H2O and Co(NO3)2.6H2O · 2,5-thiophene dicarboxylic acid / H2TDC as reported in title and discussion; chemicals section prints H2TDC as 2,5-furandicarboxylic acid2D · PristineNi-Co bimetal thienyl MOF; solvent controls morphology from spherical/block-like to sheet-like; Scheme 1 shows a structure constructed from CCDC No.1545260.2 · Introduction
Terephthalate-based Ni/Co bimetal MOF (PTA-NC MOF)Not specifiedNi and Co bimetal nodes · terephthalic acid (PTA)unknown · PristineTerephthalate-based Ni/Co bimetal MOF comparison sample; detailed XRD/IR/SEM/TEM characterisation is referenced in SI figures whose embedded content was not readable from the supplied SI text.3 · 2.2. Materials preparation

Sample register

Sample form, processing state and composition status define the context for measurements.

Show 9 sample records
SampleForm and roleProcessing and geometrySource
D-NCT MOF working electroderesearch_0414__mat__mat_nct_mofElectrode · Pristine Control · CompositeD-NCT MOF mixed with acetylene black and PTFE in EtOH at 8:1.5:0.5 and coated on foamed nickel.foamed nickel3 · 2.4. Electrochemical measurements
D-NCT MOFresearch_0414__mat__mat_nct_mofPowder · Pristine Control · Mixed MetalDMF-solvothermal Ni/Co thienyl MOF powder; aprotic-solvent variant with spherical morphology.3 · 2.2. Materials preparation
E-NCT MOF//AC ASCresearch_0414__mat__mat_e_nct_ac_deviceElectrode · Composite Sample · CompositeAsymmetric two-electrode supercapacitor using E-NCT MOF positive electrode and activated carbon negative electrode in 1 M KOH.9 · 3.3. Electrochemical properties of the asymmetric supercapacitor · Figure 9
E-NCT MOF working electroderesearch_0414__mat__mat_nct_mofElectrode · Target Sample · CompositeE-NCT MOF mixed with acetylene black and PTFE in EtOH at 8:1.5:0.5 and coated on foamed nickel.foamed nickel3 · 2.4. Electrochemical measurements
E-NCT MOFresearch_0414__mat__mat_nct_mofNanosheet · Target Sample · Mixed MetalEtOH-solvothermal Ni/Co thienyl MOF powder; high-protonation solvent variant with two-dimensional sheet-like morphology.sheet-like structure in the range of 1 um to 5 um4 · 3.1. Structural and morphology characterization · Figure 2c,f,i
M-NCT MOF working electroderesearch_0414__mat__mat_nct_mofElectrode · Pristine Control · CompositeM-NCT MOF mixed with acetylene black and PTFE in EtOH at 8:1.5:0.5 and coated on foamed nickel.foamed nickel3 · 2.4. Electrochemical measurements
M-NCT MOFresearch_0414__mat__mat_nct_mofPowder · Pristine Control · Mixed MetalMeOH-solvothermal Ni/Co thienyl MOF powder; low-protonation solvent variant with block-like/irregular spherical-flake morphology.3 · 2.2. Materials preparation
PTA-NC MOF working electroderesearch_0414__mat__mat_pta_nc_mofElectrode · Pristine Control · CompositePTA-NC MOF mixed with acetylene black and PTFE in EtOH at 8:1.5:0.5 and coated on foamed nickel.foamed nickel3 · 2.4. Electrochemical measurements
PTA-NC MOFresearch_0414__mat__mat_pta_nc_mofPowder · Pristine Control · Mixed MetalTerephthalate-based Ni/Co bimetal MOF prepared as ligand comparison sample.3 · 2.2. Materials preparation