Primary studyCore evidenceTransport Physics

Fabrication of Hierarchical Porous Metal-Organic Framework Electrode for Aqueous Asymmetric Supercapacitor

Gao W., Chen D., Quan H. et al. · ACS Sustainable Chemistry and Engineering · 2017 · 4144-4153

5materials
7samples
4synthesis routes
21measurements
85results
6claims 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 PC//HP-UiO-66 asymmetric supercapacitor delivers 32 W h kg-1 at 240 W kg-1 and maintains useful performance at high power.

Caveat: Device performance depends on porous carbon negative electrode as well as HP-UiO-66 positive electrode.

p007 · Electrochemical Properties of PC//HP-UiO-66 ASC · Figure 6e · Linked to 4 structured results

CaveatSupport assessment: Medium

Bare UiO-66 is described as having low conductivity and weak alkaline stability, motivating hierarchical porous modification.

Caveat: The low conductivity statement cites prior literature and is not supported by direct conductivity measurement in this article.

p007 · Electrochemical Behaviors · Linked to 2 structured results

Structure Property LinkSupport assessment: High

Hierarchical micro/mesoporosity, higher surface area, larger pore volume, and surface defects are proposed to improve ion/electrolyte access and electrochemical performance.

Caveat: The performance is measured on composite electrodes containing carbon black, so intrinsic MOF conductivity is not isolated.

p007 · Electrochemical Behaviors · Linked to 5 structured results

Structure Property LinkSupport assessment: Medium

Higher oxygen and zirconium surface contents suggest unsaturated Zr4+ defects on HP-UiO-66, which the authors link to improved capacitance.

Caveat: Defect density is inferred from XPS/TGA and not quantified directly.

p004 · Structure and Morphology · Table 1 · Linked to 3 structured results

Synthesis MechanismSupport assessment: High

HP-UiO-66 is formed by synthesising bimetallic Zn/Zr MOFs and removing acid-sensitive Zn-MOF domains in acid solution.

Caveat: SI Figure S2 provides only a qualitative SEM image of the Zn/Zr precursor; no additional quantitative precursor morphology is reported.

p003 · Structure and Morphology · Figure 1 · Linked to 3 structured results

Transport MechanismSupport assessment: Medium

Lower fitted Rs and Rct for HP-UiO-66 than UiO-66 indicate improved electrode/electrolyte charge transport and higher effective conductivity.

Caveat: EIS fitting is from a slurry composite electrode, not a direct intrinsic electrical conductivity measurement of the MOF powder.

p007 · Electrochemical Behaviors · Figure 5f · Linked to 4 structured results

Material identities

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

MaterialCompositionStructure contextSource
Hierarchical porous UiO-66 (HP-UiO-66)Zr-based UiO-66 with hierarchical micro/mesoporosity; empirical formula not reportedZr · H2BDC / terephthalate3D · PristineHierarchical porous UiO-66 obtained by removing Zn-MOF domains from bimetallic Zn/Zr MOFs.p001 · Abstract
PC//HP-UiO-66 asymmetric supercapacitorPorous carbon negative electrode // HP-UiO-66 positive electrodeZr in HP-UiO-66 positive electrode · H2BDC / terephthalate in HP-UiO-66unknown · CompositeAsymmetric supercapacitor device assembled from porous carbon and HP-UiO-66 electrodes.p007 · Electrochemical Properties of PC//HP-UiO-66 Asymmetric Supercapacitor · Figure 6a
Biomass-derived porous carbonCunknown · DerivedPorous carbon negative-electrode material cited from prior work and used in the asymmetric supercapacitor.p002 · Electrochemical Measurements
Bare UiO-66Zr-based UiO-66; empirical formula not reportedZr · H2BDC / terephthalate3D · PristineUiO-66 Zr-MOF phase, matched simulated and reported UiO-66 XRD patterns.p002 · Experimental Section
Bimetallic Zn/Zr MOFs precursorZn/Zr MOFs; MOF-5/UiO-66-related precursor mixture; empirical formula not reportedZn and Zr · H2BDC / terephthalate3D · PristineBimetallic Zn/Zr MOF precursor formed before acid removal of acid-sensitive Zn-MOF domains.p003 · Results and Discussion · Figure 1

Sample register

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

Show 7 sample records
SampleForm and roleProcessing and geometrySource
HP-UiO-66 working electroderesearch_0298__mat__hp_uio66Electrode · Target Sample · CompositeSlurry-coated electrode containing active HP-UiO-66, carbon black, and PVDF.Ni foamp002 · Electrochemical Measurements
HP-UiO-66 powderresearch_0298__mat__hp_uio66Powder · Target Sample · Pristine FrameworkAcid-etched hierarchical porous UiO-66, washed and dried.p002 · Experimental Section
PC//HP-UiO-66 ASCresearch_0298__mat__pc_hp_uio66_ascElectrode · Composite Sample · CompositeHP-UiO-66 positive electrode and biomass-derived porous carbon negative electrode separated by polypropylene membrane.two-electrode asymmetric supercapacitorp002 · Electrochemical Measurements
Porous carbon negative electroderesearch_0298__mat__porous_carbonElectrode · Composite Component · Derived CarbonBiomass-derived porous carbon electrode used as the negative electrode in PC//HP-UiO-66 ASC.asymmetric supercapacitor negative electrodep002 · Electrochemical Measurements
Bare UiO-66 working electroderesearch_0298__mat__uio66Electrode · Pristine Control · CompositeSlurry-coated electrode containing active UiO-66, carbon black, and PVDF.Ni foamp002 · Electrochemical Measurements
Bare UiO-66 powderresearch_0298__mat__uio66Powder · Pristine Control · Pristine FrameworkSolvothermal Zr-MOF product, washed and dried.p002 · Experimental Section
Zn/Zr MOFs precursorresearch_0298__mat__zn_zr_mof_precursorPowder · Unknown · Mixed MetalHybrid MOF precipitate before acid etching.p002 · Experimental Section