Primary studyPeripheral evidenceEnergy Storage

Overscreening-Driven Modulation of Ion Adsorption and Desorption in Conductive MOF Electrodes by Charging Rates

Niu L., Zeng L., Yu D. et al. · ACS Nano · 2025 · 2581-2590

1materials
5samples
2synthesis routes
8measurements
40results
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: High

The anion contribution to capacitance drops strongly as rate increases, while the cation contribution remains comparatively stable.

Caveat: Percentages are extracted from the plotted stacked bars and text summary, not from an accompanying table.

2584 · Results and Discussion · Figure 2i · Linked to 4 structured results

CaveatSupport assessment: Medium

The Ni3(HITP)2 film is sufficiently rigid and uniform for Sauerbrey-based EQCM gravimetry.

Caveat: Rigidity evidence is qualitative from SI frequency/dissipation plots; no numeric dissipation threshold is reported in text.

2587 · Methods - EQCM Measurements · Figure S2 · Linked to 3 structured results

Structure Property LinkSupport assessment: High

EQCM experiments and MD simulations agree on mass-change and cation/anion population trends as charging rate changes.

Caveat: The authors state experimental and simulation charging rates are not exactly the same, but use scaling analysis to justify comparison.

2586 · Conclusions and Perspective · Linked to 3 structured results

Transport MechanismSupport assessment: High

Rate-dependent overscreening strength in c-MOF pores explains why anomalous cation accumulation appears in slow charging and disappears at higher charging rates.

Caveat: Mechanism relies primarily on MD radial density and charge-density analysis.

2586 · Conclusions and Perspective · Figures 3 and 4 · Linked to 3 structured results

Transport MechanismSupport assessment: High

Increasing charging rate drives a transition from anion-dominated adsorption/desorption to ion-exchange-dominated charging in Ni3(HITP)2/[EMIM][BF4].

Caveat: Directly demonstrated for this electrode-electrolyte pair; authors call for studies across more systems.

2586 · Conclusions and Perspective · Figure 2 · Linked to 2 structured results

Material identities

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

MaterialCompositionStructure contextSource
Ni3(2,3,6,7,10,11-hexaiminotriphenylene)2Browse family: Ni₃(HITP)₂ / Ni–HITPNi3(HITP)2Ni · 2,3,6,7,10,11-hexaiminotriphenylene (HITP)2D · PristineConductive metal-organic framework electrode with monodispersed nanopores; atomistic electrode structure used for MD was obtained from experimental measurements reported in prior work.2582 · Introduction

Sample register

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

Show 5 sample records
SampleForm and roleProcessing and geometrySource
Ni3(HITP)2 c-MOF film working electrode on Au-coated quartzresearch_0827__mat__mat_ni3_hitp2Electrode · Target Sample · Pristine FrameworkVacuum filtration and wet-transfer film; NMP temporary adhesive; cellulose membrane dissolved in acetone; vacuum oven at 80 deg C for 3 h.Au-coated quartz sensor2587 · Methods - EQCM Measurements · Figure 1a
MD model of Ni3(HITP)2 electrodes in [EMIM][BF4]research_0827__mat__mat_ni3_hitp2Model · Model System · ModelSimulation box with two Ni3(HITP)2 electrodes immersed in coarse-grained [EMIM][BF4] ionic liquid electrolyte.2587 · Methods - Molecular Dynamics Simulations · Figure 1b
Ni3(HITP)2 c-MOF powderresearch_0827__mat__mat_ni3_hitp2Powder · Target Sample · Pristine FrameworkBlack precipitate after centrifugation, solvent exchange with water and methanol, filtration and vacuum treatment.2587 · Methods - Synthesis of c-MOFs
Ni3(HITP)2 c-MOF film on silicon wafer for SEMresearch_0827__mat__mat_ni3_hitp2Thin Film · Target Sample · Pristine FrameworkTransferred to silicon wafer by the same VFT method.silicon wafer2587 · Methods - Characterization of c-MOF Film · Figure S2
Ni3(HITP)2 c-MOF TEM dispersionresearch_0827__mat__mat_ni3_hitp2Powder · Target Sample · Pristine FrameworkSample dispersed in acetone; droplet transferred to carbon-coated copper grid.carbon-coated copper grid2587 · Methods - Characterization of c-MOF Film · Figure S16a