Primary studyPeripheral evidenceEnergy Storage

Electrochemical Capacitance Traces with Interlayer Spacing in Two-dimensional Conductive Metal–Organic Frameworks

Su A.Y., Apostol P., Wang J. et al. · Angewandte Chemie - International Edition · 2024 · e202402526

5materials
18samples
6synthesis routes
30measurements
46results
7claims 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.

Application RelevanceSupport assessment: Medium

Molar and gravimetric capacitance increase from H-MOF to Bu-MOF and then decrease for Pent-MOF, making Bu-MOF the best member under the reported 5 mV/s comparison.

Caveat: Capacitance values are read from plotted data; Bu-MOF peak is clear but exact values derive from figure labels/visual estimates.

3 · Electrochemical characterization · Figure 2b,c · Linked to 5 structured results

Phase AssignmentSupport assessment: High

The four HATAT-based MOFs are isostructural hexagonal 2D layered conductive frameworks with comparable in-plane structural order.

Caveat: H-MOF synthesis details are imported by reference rather than fully repeated in this paper.

2 · Results · Figure 1; Figure S4; Table S1 · Linked to 4 structured results

Structure Property LinkSupport assessment: High

Longer N-alkyl substituents increase interlayer spacing while decreasing BET surface area and total pore volume.

Caveat: BET values are apparent surface areas and pore volumes are single-point desorption values.

2 · Results · Figure 1c,e; Table S2 · Linked to 12 structured results

Structure Property LinkSupport assessment: Medium

Partial exfoliation of Bu-MOF and Pent-MOF increases access to redox-active ligand planes and strengthens faradaic contributions, supporting an accessibility rather than ion-confinement explanation.

Caveat: Exfoliation route is partial; quantitative exfoliation yield and sheet thickness are not reported.

4 · Exfoliation EIS · Figure 5; Figure S14 · Linked to 4 structured results

Transport MechanismSupport assessment: High

Increasing alkyl chain length attenuates pi-pi stacking and decreases c-direction electronic coupling, lowering electrical conductivity across the series.

Caveat: SI notes conductivities degraded by up to one order of magnitude over months, possibly due to humidity during measurement or storage.

2 · Results · Figure 1d · Linked to 4 structured results

Transport MechanismSupport assessment: Medium

Increasing interlayer spacing shifts charge storage from mostly double-layer capacitance toward larger faradaic pseudocapacitive contributions.

Caveat: Faradaic contribution is inferred from CV features and voltage-dependent EIS/Bode shapes rather than isolated redox quantification.

4 · Electrochemical analysis · Figure 3b; Figure 4; Figure 5 · Linked to 3 structured results

Transport MechanismSupport assessment: High

b-values decrease from H-MOF to Pent-MOF, indicating increasing mass-transfer limitations as alkyl chain length increases.

Caveat: b-values are fitted only over 3-20 mV/s.

3 · Electrochemical characterization · Figure 3a; Table S3 · Linked to 4 structured results

Material identities

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

MaterialCompositionStructure contextSource
Bu-MOFNi3(HIBu3-TAT)2Ni centres from nickel acetate coordinated in a hexagonal 2D layered conductive MOF. · n-butyl-substituted HIBu3-TAT ligand2D · PristineIsostructural HATAT-based hexagonal 2D layered conductive MOF; [100] reflections show comparable in-plane order and [001] reflections give layer stacking distance.2 · Results · Figure 1
Et-MOFNi3(HIEt3-TAT)2Ni centres from nickel acetate coordinated in a hexagonal 2D layered conductive MOF. · ethyl-substituted HIEt3-TAT ligand2D · PristineIsostructural HATAT-based hexagonal 2D layered conductive MOF; [100] reflections show comparable in-plane order and [001] reflections give layer stacking distance.2 · Results · Figure 1
H-MOFNi3(HIH3-TAT)2 / Ni3(HI-TAT)2Ni centres from nickel acetate coordinated in a hexagonal 2D layered conductive MOF. · unalkylated hexaaminotriazatruxene-derived HI-TAT ligand2D · PristineIsostructural HATAT-based hexagonal 2D layered conductive MOF; [100] reflections show comparable in-plane order and [001] reflections give layer stacking distance.2 · Results · Figure 1
Pent-MOFNi3(HIPent3-TAT)2Ni centres from nickel acetate coordinated in a hexagonal 2D layered conductive MOF. · n-pentyl-substituted HIPent3-TAT ligand2D · PristineIsostructural HATAT-based hexagonal 2D layered conductive MOF; [100] reflections show comparable in-plane order and [001] reflections give layer stacking distance.2 · Results · Figure 1
Ni3(HIR3-TAT)2 conductive MOF seriesNi3(HIR3-TAT)2; R = H, Et, n-Bu, n-PentNi centres from nickel acetate. · N-functionalized hexaaminotriazatruxene / HIR3-TAT ligands.2D · PristineHATAT-based hexagonal 2D layered conductive MOF family with alkyl substituents controlling interlayer spacing and pore occupancy.2 · Results · Figure 1

Sample register

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

Show 18 sample records
SampleForm and roleProcessing and geometrySource
Bu-MOF 9:1 c-MOF/carbon electroderesearch_0829__mat__bu_mofElectrode · Target Sample · Compositebulk material pressed directly onto Ni-foam using 3.0 ton force/cm2; mass loading 0.5-1.5 mgMOF/cm2.4 · Electrochemical characterization
exfoliated Bu-MOF ethanol colloidresearch_0829__mat__bu_mofNanosheet · Target Sample · Pristine FrameworkBu-MOF subjected to 5 h sonication in ethanol; centrifuged to remove larger particles, yielding a stable blue colloidal solution.4 · Exfoliation · Figure S11-S13
exfoliated Bu-MOF 9:1 electroderesearch_0829__mat__bu_mofElectrode · Target Sample · Compositeexfoliated Bu-MOF electrode with the same c-MOF/conductive-carbon composition as bulk electrodes.4 · Exfoliation EIS · Figure 5
Bu-MOF pressed pelletresearch_0829__mat__bu_mofPellet · Target Sample · Pristine Frameworkpressed pellet used for linear four-point-probe conductivity.3 · Electrical conductivity
Bu-MOF as-synthesised powderresearch_0829__mat__bu_mofPowder · Target Sample · Pristine Frameworkblack powder after MOF synthesis; washed with water and methanol where reported.6 · MOF synthesis
Et-MOF 9:1 c-MOF/carbon electroderesearch_0829__mat__et_mofElectrode · Target Sample · Compositebulk material pressed directly onto Ni-foam using 3.0 ton force/cm2; mass loading 0.5-1.5 mgMOF/cm2.4 · Electrochemical characterization
Et-MOF pressed pelletresearch_0829__mat__et_mofPellet · Target Sample · Pristine Frameworkpressed pellet used for linear four-point-probe conductivity.3 · Electrical conductivity
Et-MOF as-synthesised powderresearch_0829__mat__et_mofPowder · Target Sample · Pristine Frameworkblack powder after MOF synthesis; washed with water and methanol where reported.6 · MOF synthesis
H-MOF 9:1 c-MOF/carbon electroderesearch_0829__mat__h_mofElectrode · Target Sample · Compositebulk material pressed directly onto Ni-foam using 3.0 ton force/cm2; mass loading 0.5-1.5 mgMOF/cm2.4 · Electrochemical characterization
H-MOF pressed pelletresearch_0829__mat__h_mofPellet · Target Sample · Pristine Frameworkpressed pellet used for linear four-point-probe conductivity.3 · Electrical conductivity
H-MOF as-synthesised powderresearch_0829__mat__h_mofPowder · Target Sample · Pristine Frameworkblack powder after MOF synthesis; washed with water and methanol where reported.6 · MOF synthesis
Pent-MOF 9:1 c-MOF/carbon electroderesearch_0829__mat__pent_mofElectrode · Target Sample · Compositebulk material pressed directly onto Ni-foam using 3.0 ton force/cm2; mass loading 0.5-1.5 mgMOF/cm2.4 · Electrochemical characterization
exfoliated Pent-MOF ethanol colloidresearch_0829__mat__pent_mofNanosheet · Target Sample · Pristine FrameworkPent-MOF subjected to sonochemical treatment in ethanol; used for UV/Vis and EIS comparison.4 · Exfoliation · Figure S11, Figure S14
exfoliated Pent-MOF 9:1 electroderesearch_0829__mat__pent_mofElectrode · Target Sample · Compositeexfoliated Pent-MOF electrode used for Bode-style EIS comparison.4 · Exfoliation EIS · Figure S14
Pent-MOF pressed pelletresearch_0829__mat__pent_mofPellet · Target Sample · Pristine Frameworkpressed pellet used for linear four-point-probe conductivity.3 · Electrical conductivity
Pent-MOF as-synthesised powderresearch_0829__mat__pent_mofPowder · Target Sample · Pristine Frameworkblack powder after MOF synthesis; washed with water and methanol where reported.6 · MOF synthesis
H-/Et-/Bu-/Pent-MOF electrochemical electrode seriesresearch_0829__mat__tat_mof_seriesElectrode · Paper Level Unspecified · Compositec-MOF/conductive carbon 9:1 mixture pressed onto nickel foam.2 · Electrochemical characterization
H-/Et-/Bu-/Pent-MOF powder seriesresearch_0829__mat__tat_mof_seriesPowder · Paper Level Unspecified · Pristine FrameworkAs-synthesised black powder series used for structural, porosity, and morphology comparison.2 · Results · Figure 1