Primary studyCore evidenceTransport Physics

Why conductivity is not always king-physical properties governing the capacitance of 2D metal-organic framework-based EDLC supercapacitor electrodes: A Ni3(HITP)2case study

Borysiewicz M.A., Dou J.-H., Stassen I. et al. · Faraday Discussions · 2021 · 298-304

1materials
6samples
3synthesis routes
18measurements
37results
5claims 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

Conductivity differences up to two orders of magnitude were inconsequential for capacitance once conductivity was at least about 10^-4 S cm^-1.

Caveat: Threshold is presented as a rule of thumb for good electrical polarisation in this study, not as a universal proof.

main p.6, article p.303 · Conclusions · Linked to 6 structured results

Structure Property LinkSupport assessment: High

Apparent BET surface area is correlated with mesostructural morphology; branched hierarchical agglomerates are preferred to globular/intertwined agglomerates.

Caveat: Authors state apparent surface area likely reflects morphology rather than intrinsic porosity differences.

main p.6, article p.303 · Conclusions · Linked to 5 structured results

Structure Property LinkSupport assessment: High

For these Ni3(HITP)2 batches, sample morphology has a greater impact on measured supercapacitor electrode performance than bulk electrical conductivity differences.

Caveat: Claim is for this representative 2D anisotropic MOF and neat MOF electrode configuration.

main p.1, article p.298 · Abstract · Linked to 9 structured results

Transport MechanismSupport assessment: Medium

Facets normal to the crystallographic c axis allow access to the 1.6 nm channels, whereas facets parallel to c lack obvious openings and impede hydrated K+ ion penetration.

Caveat: Mechanistic interpretation based on morphology, known anisotropic structure and absence of CV intercalation peaks.

main p.5, article p.302 · Main text · Linked to 4 structured results

Transport MechanismSupport assessment: High

Longer individual crystals increase the electrode EDR, limiting observable capacitance and power; EDR cannot be determined from bulk MOF conductivity.

Caveat: Applies to these anisotropic 2D channels and hydrated K+ ion transport; authors note it may not hold for three-dimensional pores.

main p.6, article p.303 · Conclusions · Linked to 6 structured results

Material identities

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

MaterialCompositionStructure contextSource
Ni3(HITP)2Browse family: Ni₃(HITP)₂ / Ni–HITPNi3(HITP)2Square-planar Ni2+ ions bound through imine/iminosemiquinonate linkages. · HITP = 2,3,6,7,10,11-hexaiminotriphenylene, generated from HATP.6HCl precursor.2D · PristineGraphene-like two-dimensional sheets with slipped parallel stacking and tubular channels about 1.6 nm in diameter.main p.2, article p.299 · Main text

Sample register

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

Show 6 sample records
SampleForm and roleProcessing and geometrySource
HITP_A neat-MOF electroderesearch_0225__mat__ni3_hitp2Electrode · Target Sample · Pristine Framework5 mg neat HITP_A pressed into Ni foam for a mechanically stable three-electrode cell working electrode.Ni foam current collectorSI p.S2 · Electrode preparation
HITP_A Ni3(HITP)2 powder batchresearch_0225__mat__ni3_hitp2Powder · Target Sample · Pristine FrameworkBlack powder dried on a Schlenk line for 2 h after water and ethanol washing.main p.2, article p.299 · Main text · Table 1; Fig. 1
HITP_B neat-MOF electroderesearch_0225__mat__ni3_hitp2Electrode · Target Sample · Pristine Framework5 mg neat HITP_B pressed into Ni foam for a mechanically stable three-electrode cell working electrode.Ni foam current collectorSI p.S2 · Electrode preparation
HITP_B Ni3(HITP)2 powder batchresearch_0225__mat__ni3_hitp2Powder · Target Sample · Pristine FrameworkBlack powder dried on a Schlenk line for 2 h after water and ethanol washing.main p.3, article p.300 · Main text · Fig. 1
HITP_C neat-MOF electroderesearch_0225__mat__ni3_hitp2Electrode · Target Sample · Pristine Framework5 mg neat HITP_C pressed into Ni foam for a mechanically stable three-electrode cell working electrode.Ni foam current collectorSI p.S2 · Electrode preparation
HITP_C Ni3(HITP)2 powder batchresearch_0225__mat__ni3_hitp2Powder · Target Sample · Pristine FrameworkBlack powder dried on a Schlenk line for 20 h after water and ethanol washing.SI p.S1 · MOF synthesis