Primary studyCore evidenceThin Film Device

In-situ growth of electrically conductive MOFs in wood cellulose scaffold for flexible, robust and hydrophobic membranes with improved electrochemical performance

Wang Z., Sun B., Liao J. et al. · International Journal of Biological Macromolecules · 2024 · 127989

5materials
13samples
6synthesis routes
29measurements
59results
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

Room-temperature densification of the EC-MOF@TOW bulk yields flexible ultrathin membranes with tensile strength above 180 MPa and stable conductivity/wetting under deformation.

Caveat: Long-cycle mechanical fatigue and full wearable-device tests are not reported in the main text.

p009 / journal page 9 · 4. Conclusion · Linked to 5 structured results

CaveatSupport assessment: High

Further comprehensive research is necessary to optimise whole-supercapacitor performance using EC-MOF@TOW membrane electrodes for practical applications.

Caveat: This is an author-stated limitation.

p009 / journal page 9 · 3.3 Electrochemical properties of EC-MOF@TOW membrane · Table S3 · Linked to 2 structured results

Structure Property LinkSupport assessment: High

The 50%-NiCAT@TOW membrane electrode outperforms NiCAT powder because high conductivity, hierarchical pores and 1D NiCAT channels lower ion/electron transport resistance.

Caveat: Only preliminary three-electrode performance is reported; full symmetric solid supercapacitor optimisation is deferred.

p009 / journal page 9 · 3.3 Electrochemical properties of EC-MOF@TOW membrane · Fig. 6e-f · Linked to 5 structured results

Structure Property LinkSupport assessment: Medium

The hydrophobicity of 50%-NiCAT@TOW is attributed to the continuous rough NiCAT covering layer on the TOW surface.

Caveat: The authors explicitly state that the intrinsic hydrophobicity of the NiCAT layer and contributing factors require further investigation.

p008 / journal page 8 · 3.2 Properties characterization of EC-MOF@TOW membrane · Fig. 5c · Linked to 3 structured results

Synthesis MechanismSupport assessment: High

COO- groups introduced by TEMPO oxidation immobilise Ni2+ or Cu2+ through electrostatic attraction, enabling uniform and continuous EC-MOF growth on wood cellulose fibres.

Caveat: CuCAT-specific bonding evidence is in missing supporting Fig. S5.

p004 / journal page 4 · 3.1 Preparation of EC-MOF@TOW membrane · Linked to 3 structured results

Transport MechanismSupport assessment: High

Higher Ni2+ pretreatment concentration increases NiCAT@TOW conductivity by providing more nucleation sites, reducing EC-MOF grain boundaries and particle spacing, and forming interconnected nanowire transport pathways.

Caveat: Mechanistic claim is inferred from morphology and conductivity trends; no direct grain-boundary metric is reported.

p008 / journal page 8 · 3.3 Electrochemical properties of EC-MOF@TOW membrane · Fig. 6a-b · Linked to 5 structured results

Material identities

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

MaterialCompositionStructure contextSource
CuCATBrowse family: Cu₃(HHTP)₂ / Cu–HHTPCu-HHTP catecholate frameworkCu(II) · 2,3,6,7,10,11-hexahydroxytriphenylene hydrate (HHTP)2D · PristineCopper catecholate EC-MOF analogue grown on TOW; bonding and properties are mainly discussed in missing SI.p004 / journal page 4 · 3.1 Preparation of EC-MOF@TOW membrane
CuCAT@TOW composite membraneCuCAT on TEMPO-oxidised wood cellulose scaffoldCu(II) in CuCAT and Cu(II) bridge sites · HHTP in CuCAT; carboxylated cellulose in TOW scaffold2D · CompositeComposite membrane containing CuCAT grown on TOW; continuous growth is reported from SEM/EDX in missing SI.p005 / journal page 5 · 3.1 Preparation of EC-MOF@TOW membrane · Fig. S3
NiCATBrowse family: Ni₃(HHTP)₂ / Ni–HHTPNi-HHTP catecholate frameworkNi(II) · 2,3,6,7,10,11-hexahydroxytriphenylene hydrate (HHTP)2D · Pristine2D hexagonal nickel catecholate layers packed along the c-axis in an ABAB arrangement, with 1D channels along the c-axis.p005 / journal page 5 · 3.1 Preparation of EC-MOF@TOW membrane · Fig. 2d
NiCAT@TOW composite membraneBrowse family: Ni₃(HHTP)₂ / Ni–HHTPNiCAT on TEMPO-oxidised wood cellulose scaffoldNi(II) in NiCAT; Ni(II) bridge sites at the TOW interface · HHTP in NiCAT; carboxylated cellulose in TOW scaffold2D · CompositeComposite membrane containing continuous NiCAT nanolayers/nanowires grown on porous TEMPO-oxidised balsa wood scaffold.p004 / journal page 4 · 3.1 Preparation of EC-MOF@TOW membrane
TEMPO-oxidised balsa wood scaffold (TOW)carboxylated cellulose-rich balsa wood scaffoldcellulose hydroxyl/carboxylate groupsunknown · Model SystemPorous, aligned wood cellulose scaffold bearing COO- groups after delignification and TEMPO oxidation.p004 / journal page 4 · 3.1 Preparation of EC-MOF@TOW membrane · Fig. 1

Sample register

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

Show 13 sample records
SampleForm and roleProcessing and geometrySource
50%-CuCAT@TOW membraneresearch_0672__mat__mat_cucat_towThin Film · Composite Sample · CompositeCuCAT grown on TOW using the same general process as NiCAT@TOW; details in missing SITEMPO-oxidised wood scaffoldp002 / journal page 2 · 2.3 Preparation of NiCAT@TOW composite membrane
delignified wood (DW)research_0672__mat__mat_towThin Film · Model System · Modelbalsa wood delignified in NaClO2/acetate buffer and stored in ethanolbalsa wood · 1 mm starting wood thicknessp002 / journal page 2 · 2.2 Preparation of TEMPO oxidized Balsa wood substrate (TOW)
50%-Ni2+-TOWresearch_0672__mat__mat_towThin Film · Model System · CompositeTOW pretreated with 50 wt% Ni(NO3)2.6H2O without HHTP-derived NiCAT growthTEMPO-oxidised wood scaffoldp005 / journal page 5 · 3.1 Preparation of EC-MOF@TOW membrane · Fig. 3d
50%-NiCAT@DWresearch_0672__mat__mat_nicat_towThin Film · Composite Sample · CompositeDW without TEMPO oxidation but treated with 50% Ni2+ before attempted NiCAT growthdelignified wood without TEMPO oxidationp008 / journal page 8 · 3.3 Electrochemical properties of EC-MOF@TOW membrane · Fig. 6b
NiCAT powderresearch_0672__mat__mat_nicatPowder · Pristine Control · Pristine Frameworkhydrothermally synthesised NiCAT crystals/powderp005 / journal page 5 · 3.1 Preparation of EC-MOF@TOW membrane · Fig. 2f; Fig. 3
NiCAT powder electroderesearch_0672__mat__mat_nicatElectrode · Pristine Control · Pristine FrameworkNiCAT powder mixed with polymer binder and coated onto carbon papercarbon paper current collectorp009 / journal page 9 · 3.3 Electrochemical properties of EC-MOF@TOW membrane · Fig. 6e-f
1%-NiCAT@TOW membraneresearch_0672__mat__mat_nicat_towThin Film · Composite Sample · CompositeTOW pretreated with 1 wt% Ni(NO3)2.6H2O, NiCAT grown in situ, humidified and pressedTEMPO-oxidised wood scaffoldp002 / journal page 2 · 2.3 Preparation of NiCAT@TOW composite membrane · Fig. 6a
10%-NiCAT@TOW membraneresearch_0672__mat__mat_nicat_towThin Film · Composite Sample · CompositeTOW pretreated with 10 wt% Ni(NO3)2.6H2O, NiCAT grown in situ, humidified and pressedTEMPO-oxidised wood scaffoldp002 / journal page 2 · 2.3 Preparation of NiCAT@TOW composite membrane · Fig. 6a
5%-NiCAT@TOW membraneresearch_0672__mat__mat_nicat_towThin Film · Composite Sample · CompositeTOW pretreated with 5 wt% Ni(NO3)2.6H2O, NiCAT grown in situ, humidified and pressedTEMPO-oxidised wood scaffoldp002 / journal page 2 · 2.3 Preparation of NiCAT@TOW composite membrane · Fig. 6a
50%-NiCAT@TOW membraneresearch_0672__mat__mat_nicat_towThin Film · Target Sample · CompositeTOW pretreated with 50 wt% Ni(NO3)2.6H2O, NiCAT grown in situ, humidified at 98% RH and pressed at 10 MPaTEMPO-oxidised wood scaffold · about 0.3 mmp004 / journal page 4 · 3.1 Preparation of EC-MOF@TOW membrane · Fig. 2a-c
NiCAT@TOW without 50%-Ni2+ pretreatmentresearch_0672__mat__mat_nicat_towThin Film · Composite Sample · CompositeTOW scaffold without 50%-Ni2+ treatment before attempted NiCAT growthTEMPO-oxidised wood scaffoldp008 / journal page 8 · 3.3 Electrochemical properties of EC-MOF@TOW membrane · Fig. 6b
TOW membraneresearch_0672__mat__mat_towThin Film · Model System · Modelcompressed TOW scaffold at room temperaturecompressed TOW scaffold · about 0.29 mm from Fig. 1g visual labelp004 / journal page 4 · 3.1 Preparation of EC-MOF@TOW membrane · Fig. 1e-g
TOW scaffoldresearch_0672__mat__mat_towThin Film · Model System · Modeldelignified wood oxidised by TEMPO/NaClO/NaBr and vacuum freeze-driedbalsa wood cellulose scaffold · 20 mm x 15 mm x 1 mm oxidised samples before compressionp002 / journal page 2 · 2.2 Preparation of TEMPO oxidized Balsa wood substrate (TOW)