Li T., Zhang W.-D., Liu Y. et al. · Journal of Materials Chemistry A · 2019 · 19676-19681
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
An AC//Ni-COF asymmetric supercapacitor reaches a 1.5 V window and 130 W h kg^-1 at 839 W kg^-1, placing the device among high-performing COF/MOF-based supercapacitor reports cited by the authors.
Caveat: Device comparison is literature-level and not normalised here across different electrode/device conventions.
main p.5, article p.19680 · Device evaluation · Fig. 4f · Linked to 3 structured results
The Ni-coordinated framework delivers much higher specific capacitance than the nickel-free Ni0-COF control, supporting the importance of square-planar Ni(II) coordination.
Caveat: Capacitance data are from composite electrodes with conductive carbon/binder and Ni foam substrate.
main p.3, article p.19678 · Electrochemistry · Fig. 3c-d; Fig. S19-S20 · Linked to 4 structured results
Square-planar Ni(II) coordination and strong pi-conjugation are proposed to be responsible for the much higher electrical conductivity of Ni-COF relative to Ni0-COF.
Caveat: The comparison is between different framework compositions; thin-film preparation details are vague.
main p.3, article p.19678 · Electrical conductivity · Fig. 2i; Fig. 3 · Linked to 4 structured results
The authors propose a hydroquinone-to-benzoquinone redox mechanism involving two-electron transfer, assisted by Ni(II) and the conjugated 2D framework.
Caveat: Mechanism is proposed from electrochemical behaviour and scheme rather than direct operando structural evidence in the provided documents.
main p.5, article p.19680 · Mechanism · Scheme 1 · Linked to 2 structured results
Ni-COF behaves as a semiconductor at room temperature, with conductivity increasing with temperature.
Caveat: No activation energy or band gap from transport fitting is reported.
main p.1 and p.3, article pp.19676 and 19678 · Abstract; Electrical conductivity · Fig. 2i · Linked to 2 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| AC//Ni-COF asymmetric supercapacitor | Activated carbon negative electrode paired with Ni-COF positive electrode.Ni(II)-Salphen units in the Ni-COF positive electrode. · Ni-COF based on BTA and HBC; activated carbon counter-electrode. | unknown · CompositeTwo-electrode asymmetric supercapacitor device, not a new crystalline framework. | main p.4, article p.19679 · Device evaluation · Fig. 4 |
| Ni0-COF | Nickel-free Schiff-base COF control; exact empirical formula not reported.No metal node; prepared without Ni2+ using acetic acid. · 1,2,4,5-benzenetetraamine tetrahydrochloride (BTA) and 2,5-dihydroxy-1,4-benzenedicarboxaldehyde (HBC). | 2D · PristineNickel-free layered COF comparison material with PXRD, FT-IR, NMR, XPS, sorption, SEM/TEM, and electrochemical controls reported in the SI. | main p.3, article p.19678 · Results and discussion · Fig. S10-S16 |
| Ni-COF | Ni-containing salphen covalent organic framework; exact empirical formula not reported.Square-planar Ni(II)-Salphen coordination units; Ni(II) coordinated by two N and two O atoms. · 1,2,4,5-benzenetetraamine tetrahydrochloride (BTA) and 2,5-dihydroxy-1,4-benzenedicarboxaldehyde (HBC). | 2D · PristineLayered 2D honeycomb-like covalent organic framework assigned to eclipsed AA stacking from PXRD simulation/Pawley refinement; regular hexagonal pores. | main p.2, article p.19677 · Results and discussion · Fig. 1 |
| Nickel foam substrate control | Ni foamMetallic nickel substrate. · not_applicable | unknown · UnknownCommercial/current-collector substrate control, not a framework. | SI p.15 · Characterization · Fig. S18 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| AC//Ni-COF asymmetric supercapacitor deviceresearch_0316__mat__ac_ni_cof_device | Electrode · Composite Sample · Composite | Asymmetric device assembled with Ni-COF positive electrode and activated carbon negative electrode in 3 M KOH. | SI p.3 · Electrochemical performance experiments · Fig. 4 |
| Ni0-COF three-electrode working electroderesearch_0316__mat__ni0_cof | Electrode · Pristine Control · Composite | Active material, acetylene black and PTFE mixed 8:1:1, dispersed in ethanol, and coated on Ni foam.Ni foam, 1 cm2 | SI p.3 · Electrochemical performance experiments · Fig. S19-S20 |
| Ni0-COF powderresearch_0316__mat__ni0_cof | Powder · Pristine Control · Pristine Framework | Solvothermal acetic-acid-assisted nickel-free COF product washed, Soxhlet extracted and vacuum dried. | SI p.6 · Synthesis of Ni0-COF |
| Ni-COF three-electrode working electroderesearch_0316__mat__ni_cof | Electrode · Composite Sample · Composite | Active material, acetylene black and PTFE mixed 8:1:1, dispersed in ethanol, and coated on Ni foam.Ni foam, 1 cm2 | SI p.3 · Electrochemical performance experiments |
| Ni-COF black powderresearch_0316__mat__ni_cof | Powder · Target Sample · Pristine Framework | Solvothermal product washed with THF, DMF and MeOH, Soxhlet extracted by THF, and vacuum dried. | SI p.5 · Synthesis of Ni-COF |
| Ni-COF thin film on quartzresearch_0316__mat__ni_cof | Thin Film · Target Sample · Pristine Framework | Thin film prepared on quartz for variable-temperature van der Pauw conductivity.Quartz substrate · not reported | main p.3, article p.19678 · Electrical conductivity · Fig. 2i |
| Ni foam electrochemical substrate controlresearch_0316__mat__ni_foam_substrate | Electrode · Pristine Control · Unknown | Measured in the same three-electrode control experiment to evaluate substrate capacitance contribution.Ni foam | SI p.15 · Characterization · Fig. S18 |