Primary studyCore evidenceTransport Physics

Fabrication of high-performance supercapacitor of surface-engineered ZIF-8 for energy storage applications

Karim M.R., Choi C.-H., Mohammad A. et al. · Journal of Energy Storage · 2024 · 112199

3materials
7samples
7synthesis routes
21measurements
57results
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

2-Ag@ZIF-8 is the best-performing electrode among ZIF-8, 1-Ag@ZIF-8 and 2-Ag@ZIF-8, reaching 538.8 F g-1 at 1 A g-1.

Caveat: Three-electrode supercapacitor result; device-level capacitance is much lower and reported separately.

7 · 4. Conclusion · Linked to 3 structured results

CaveatSupport assessment: High

Although the article repeatedly discusses improved electrical conductivity, no direct electrical-transport conductivity measurement or conductivity value is reported in the supplied main text.

Caveat: Conductivity is treated as an inferred electrochemical-performance factor, not a directly measured transport value.

1 · Abstract · Linked to 2 structured results

Structure Property LinkSupport assessment: High

Ag nanoparticle anchoring on ZIF-8 increases conductivity and rapid electron transport, producing higher supercapacitor capacitance.

Caveat: No direct DC electrical conductivity value is reported; conductivity improvement is inferred from electrochemistry and literature rationale.

7 · 3.2.2. Electrochemical performance · Fig. 6 · Linked to 4 structured results

Synthesis MechanismSupport assessment: Medium

An electroactive Shewanella oneidensis biofilm was used as an eco-friendly route to deposit Ag nanoparticles on ZIF-8.

Caveat: The supplied SI text provides biofilm/MFC culture details, but the exact Ag@ZIF-8 deposition mixture, reaction time and workup remain incomplete.

2-3 · Introduction and Experiment · Fig. 1 · Linked to 3 structured results

Transport MechanismSupport assessment: Medium

The Ag@ZIF-8 electrode stores charge through a Faradaic process associated with reversible K+ insertion.

Caveat: Mechanism is inferred from CV peak positions and a literature-based redox expression; no in situ confirmation is reported.

6 · 3.2.2. Electrochemical performance · Fig. 5 · Linked to 2 structured results

Material identities

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

MaterialCompositionStructure contextSource
Silver nanoparticle-deposited ZIF-8Browse family: ZIF-8 / Zn(mIm)₂Ag@ZIF-8Zn2+ framework nodes with metallic Ag nanoparticles · 2-methylimidazolate / imidazolate linker inherited from ZIF-83D · CompositeComposite/nanostructured ZIF-8 retaining ZIF-8 diffraction peaks with metallic Ag0 features; Ag peaks assigned using JCPDS no. 04-0783.3 · 2. Experiment · Fig. 1
Ag@ZIF-8/activated carbon hybrid supercapacitor deviceBrowse family: ZIF-8 / Zn(mIm)₂Ag@ZIF-8/AC HSZn2+ framework nodes with metallic Ag nanoparticles; activated carbon counter electrode · 2-methylimidazolate / imidazolate linker in Ag@ZIF-8 cathodeunknown · CompositeAsymmetric/hybrid device assembled from Ag@ZIF-8 cathode and AC anode in 3 M KOH.7 · 3.2.3. Full cell performance as hybrid supercapacitor · Fig. 7
Zeolitic imidazolate framework-8Browse family: ZIF-8 / Zn(mIm)₂ZIF-8Zn2+ · 2-methylimidazolate / 2-methylimidazole precursor3D · PristineZIF-8 phase assigned by PXRD; peaks at 7.4, 10.4, 12.7 and 18.0 deg indexed to (011), (002), (112) and (222).3 · 3.1. Structural and morphological characterization · Fig. 2a

Sample register

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

Show 7 sample records
SampleForm and roleProcessing and geometrySource
1-Ag@ZIF-8/Ni foam working electroderesearch_0580__mat__mat_ag_zif8Electrode · Target Sample · CompositeActive material/carbon black/Nafion 80:10:10 slurry in ethanol applied to Ni foam and dried overnight.Ni foam, 1 x 1 cm23 · 2.1. Development of electrodes for energy-storage application
1-Ag@ZIF-8research_0580__mat__mat_ag_zif8Powder · Target Sample · CompositeZIF-8 post-modified with Ag nanoparticles using electroactive biofilm and 1 mM AgNO3.3 · 2. Experiment · Fig. 1
2-Ag@ZIF-8/Ni foam working electroderesearch_0580__mat__mat_ag_zif8Electrode · Target Sample · CompositeActive material/carbon black/Nafion 80:10:10 slurry in ethanol applied to Ni foam and dried overnight.Ni foam, 1 x 1 cm25 · 3.2.2. Electrochemical performance of fabricated electrodes as positive electrode · Fig. 6
2-Ag@ZIF-8research_0580__mat__mat_ag_zif8Powder · Target Sample · CompositeZIF-8 post-modified with Ag nanoparticles using electroactive biofilm and 2 mM AgNO3.4 · 3.1. Structural and morphological characterization · Fig. 2d
Ag@ZIF-8/AC hybrid supercapacitorresearch_0580__mat__mat_ag_zif8_ac_hsElectrode · Composite Sample · CompositeHybrid capacitor assembled with Ag@ZIF-8 cathode, activated carbon anode and 3 M KOH electrolyte; SI text provides only the Fig. S1 caption for AC-anode data.7 · 3.2.3. Full cell performance as hybrid supercapacitor · Fig. 7
ZIF-8/Ni foam working electroderesearch_0580__mat__mat_zif8Electrode · Pristine Control · CompositeActive material/carbon black/Nafion 80:10:10 slurry in ethanol applied to Ni foam and dried overnight.Ni foam, 1 x 1 cm23 · 2.1. Development of electrodes for energy-storage application
ZIF-8research_0580__mat__mat_zif8Powder · Pristine Control · Pristine FrameworkAs-synthesised ZIF-8 powder prepared from zinc nitrate hexahydrate solution and 2-methylimidazole solution; SI text lacks reagent amounts.3 · 2. Experiment · Fig. 1