Conjugated Copper–Catecholate Framework Electrodes for Efficient Energy Storage

2materials

6samples

4synthesis routes

15measurements

58results

7claims and caveats

Evidence map

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Electrochemistry Application4 measurements25 results →Diffraction Structure3 measurements11 results →Electrical Transport2 measurements8 results →Spectroscopy3 measurements8 results →Computational Modelling1 measurement2 results →Microscopy Morphology1 measurement2 results →Porosity1 measurement2 results →

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

Cu-DBC electrodes show high supercapacitor performance, including 479 F g-1 in three-electrode testing and solid-state device capacitance of 396 F g-1, 879 mF cm-2, and 22 F cm-3.

Caveat: Device electrodes are composites containing carbon black and PTFE/Nafion, so application results should not be interpreted as pristine-framework-only device behaviour.

1081, 1084-1085 · Abstract / Results and discussion · Figures 2 and 4; Tables S7-S9 · Linked to 5 structured results

Application RelevanceSupport assessment: High

Cu-DBC is chemically robust in common solvents and water, enabling use in aqueous NaCl electrolyte.

Caveat: Chemical stability was judged primarily by PXRD/SEM after one-week immersion; long-term electrochemical structural retention was not deeply extracted.

1083 · Results and discussion · Figure S17 · Linked to 3 structured results

Phase AssignmentSupport assessment: High

Cu-DBC is assigned as a 4-fold interpenetrated 3D copper-catecholate c-MOF with distorted diamond networks and 1D channels along the c axis.

Caveat: The paper states EDT resolution was limited and the structure solution used geometric constraints; full crystallographic coordinates are in Table S11.

1082 · Results and discussion · Figure 1; Figure S8; Table S11 · Linked to 7 structured results

Phase AssignmentSupport assessment: High

XANES/EXAFS, FTIR, XPS, and absence of Cu metal PXRD peaks support formation of a copper bis(dihydroxy) complex framework rather than copper/copper oxide contaminants.

Caveat: XPS deconvolution still reports a minor Cu+ component.

1083 · Results and discussion · Figures 1c, S9-S12; Tables S1-S3 · Linked to 4 structured results

Structure Property LinkSupport assessment: Medium

The 8OH-DBC ligand has strong redox capacitance but poorer rate capability and higher impedance than Cu-DBC, supporting the role of framework conductivity in rate performance.

Caveat: Exact 8OH-DBC electrode preparation was not separately detailed in the extracted SI text.

S15-S17 · Section 18 · Figures S19-S23 · Linked to 3 structured results

Transport MechanismSupport assessment: High

Cu-DBC charge storage combines EDL capacitance and pseudocapacitance from redox-active ligand/copper centres, with about 62% EDL and 38% pseudocapacitive contribution by Trasatti analysis.

Caveat: Capacitance-contribution separation is model-dependent and based on CV analysis assumptions described in the SI.

1084 · Results and discussion · Figure 3 · Linked to 4 structured results

Transport MechanismSupport assessment: Medium

Cu-DBC is a semiconducting conductive MOF; pellet conductivity increases nonlinearly with temperature and is about 1.0 S m-1 at room temperature.

Caveat: Conductivity depends strongly on pellet thickness and apparent packing; no activation energy was reported.

1083 · Results and discussion · Figure S16; Tables S5-S6 · Linked to 5 structured results

Material identities

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

Material	Composition	Structure context	Source
8OH-DBC ligand	Dibenzo[g,p]chrysene-2,3,6,7,10,11,14,15-octaolNone · Redox-active octaol catechol ligand used to build Cu-DBC.	0D · Model SystemMolecular ligand and electrochemical control/model for Cu-DBC redox behaviour.	S5-S18 · Sections 4 and 18 · Figures S1, S19-S23
Cu-DBC copper catecholate framework	Cu2DBC.4H2OCopper ions in copper bis(dihydroxy) coordination geometry; XANES/XPS mainly Cu(II) with a trace Cu(I) component. · Dibenzo[g,p]chrysene-2,3,6,7,10,11,14,15-octaol, abbreviated 8OH-DBC or DBC after deprotonation.	3D · PristineFour-fold interpenetrated distorted diamond (dia) 3D conductive MOF with 1D straight channels along the c axis; possible space group P212121.	1081-1083 · Abstract / Results and discussion · Figure 1

Sample register

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

Show 6 sample records

Sample	Form and role	Processing and geometry	Source
8OH-DBC ligand electrochemical controlresearch_0068__mat__mat_8oh_dbc	Model · Model System · Model	Organic ligand control measured electrochemically and computationally.	S15-S18 · Section 18 · Figures S19-S23
Free-standing Cu-DBC film electroderesearch_0068__mat__mat_cu_dbc	Electrode · Composite Sample · Composite	Rolled free-standing film dried at 70 C under vacuum overnight.40 um electrode thickness used for areal/volumetric capacitance calculation.	S4 · Preparation the free-standing Cu-DBC film electrode · Scheme S2
Cu-DBC-modified glassy carbon electroderesearch_0068__mat__mat_cu_dbc	Electrode · Composite Sample · Composite	Cu-DBC slurry drop-cast on pre-polished GCE and dried in air before three-electrode measurements.Glassy carbon electrode, area 0.0707 cm2	S4 · Section 3. Electrochemical Measurements
Pelletised Cu-DBC crystalline powderresearch_0068__mat__mat_cu_dbc	Pellet · Target Sample · Pristine Framework	As-synthesised Cu-DBC powder pressed with 0.5 ton force for conductivity measurements.0.25-1.22 mm pellets; 3 mm die reported, table surface area 0.7065 cm2.	S13-S14 · Section 16. Electrical Conductivity Measurement · Table S5
As-synthesised Cu-DBC powderresearch_0068__mat__mat_cu_dbc	Powder · Target Sample · Pristine Framework	Black rod-shaped microcrystalline powder after washing and vacuum drying.	S3 · Section 2. Synthetic Procedures · Scheme S1
Symmetric Cu-DBC solid-state supercapacitor cellresearch_0068__mat__mat_cu_dbc	Electrode · Composite Sample · Composite	Two identical Cu-DBC film electrodes assembled with 30 uL 1 M NaCl aqueous electrolyte.Coin-shaped cell with NKK-MPF30AC-100 membrane separator · Two 3 x 3 mm2 free-standing film slices; active mass about 2.22 mg cm-2.	S4 · Preparation Two-electrode symmetrical Solid-State cell · Scheme S2