Primary studyCore evidenceTransport Physics

Carbon-incorporated Janus-type Ni2P/Ni hollow spheres for high performance hybrid supercapacitors

Hou S., Xu X., Wang M. et al. · Journal of Materials Chemistry A · 2017 · 19054-19061

4materials
8samples
8synthesis routes
8measurements
44results
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 NP-150//AC hybrid supercapacitor combines high energy density with strong cycling stability, indicating application potential for energy storage.

Caveat: Device construction details such as active-mass loading and separator are incomplete, limiting direct reproducibility and benchmarking.

p007 / journal page 19060 · Results and discussion · Fig. 6, Table 1 · Linked to 3 structured results

CaveatSupport assessment: High

SI Table S1 reports the NP-250 Ni0+ Ni 2p3/2 binding energy as 582.99 eV, which is inconsistent with the Ni 2p3/2 region and neighbouring sample values; the value was retained as reported and marked uncertain.

Caveat: Could be source typo or OCR/table extraction issue; no correction document was supplied.

p004 / SI page S-4 · Table S1 · Table S1 · Linked to 1 structured result

Structure Property LinkSupport assessment: High

NP-150 gives the best capacitance because it balances hollow morphology, metallic Ni charge-transfer pathways and a conductive carbon skeleton.

Caveat: The relative contributions of Ni2P, metallic Ni and carbon are argued from comparative samples rather than independently deconvoluted.

p006 / journal page 19059 · Results and discussion · Fig. 4d · Linked to 4 structured results

Synthesis MechanismSupport assessment: High

Hollow Ni2P/Ni/C spheres form because PH3 generated from NaH2PO2 phosphorises Ni-MOFs while faster outward Ni diffusion than inward PH3 diffusion creates voids through the Kirkendall effect.

Caveat: Mechanism is inferred from morphology, phase evolution and cited Kirkendall literature rather than direct in situ measurement.

p003 / journal page 19056 · Results and discussion · Fig. 1 · Linked to 2 structured results

Transport MechanismSupport assessment: Medium

Metallic Ni in NP-50 and NP-150 lowers charge-transfer resistance relative to more highly phosphorised NP-250 and NP-350, improving charge transfer/electrical conductivity.

Caveat: No direct four-probe electronic conductivity was reported; inference is based on EIS Rct and XPS/XRD phase evidence.

p005 / journal page 19058 · Results and discussion · Fig. 4a · Linked to 5 structured results

Material identities

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

MaterialCompositionStructure contextSource
N-0 annealed Ni-MOF-derived controlNi/C; exact composition not fully specifiedmetallic Ni generated by annealing Ni-MOFs · carbonised MOF-derived carbon0D · DerivedAnnealed non-phosphorised control produced with 0 mg NaH2PO2.H2O; XRD shows metallic Ni peaks.p002-p004 / journal pages 19055, 19057 · Experimental; Results and discussion · Fig. 3a
carbon-incorporated Janus-type Ni2P/Ni hollow spheresNi2P/Ni/CNi2P and metallic Ni nanocrystals derived from Ni-MOFs · porous carbon skeleton from carbonised MOF organic component0D · DerivedJanus-type Ni2P/Ni heterostructured hollow nanospheres incorporated with porous carbon.p001-p003 / journal pages 19054-19056 · Abstract; Results and discussion · Fig. 1, Fig. 2
Ni-based MOF nanospheresNi-BTC/PVP-derived Ni-MOF; exact framework formula not reportedNi2+ from Ni(NO3)2.6H2O · benzene-1,3,5-tricarboxylic acid (BTC); PVP additive/template used in synthesisunknown · PristineCrystalline spherical Ni-MOF precursor; detailed formation mechanism referenced to previous work.p002-p003 / journal pages 19055-19056 · Experimental; Results and discussion · Fig. 1, Fig. 2
NP-150//AC hybrid supercapacitor deviceNP-150 positive electrode // active carbon negative electrode in 2 M KOHNi2P/Ni/C positive electrode component · MOF-derived carbon in positive electrode; active carbon negative electrodeunknown · CompositeTwo-electrode hybrid supercapacitor device assembled from NP-150 and active carbon.p006 / journal page 19059 · Results and discussion · Fig. 5

Sample register

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

Show 8 sample records
SampleForm and roleProcessing and geometrySource
N-0research_0269__mat__mat_n0_annealed_controlPowder · Pristine Control · Derived CarbonNi-MOFs annealed at 450 deg C for 1 h in nitrogen with 0 mg NaH2PO2.H2O.p002 / journal page 19055 · Synthesis of Ni2P/Ni/C hybrid composites
Ni-MOFsresearch_0269__mat__mat_ni_mofPowder · Pristine Control · Pristine FrameworkAs-synthesised solvothermal Ni-MOF nanospheres, dried overnight at 60 deg C.p002 / journal page 19055 · Synthesis of Ni-MOFs
NP-150research_0269__mat__mat_ni2p_ni_cPowder · Target Sample · CompositeNi-MOFs phosphorised/carbonised with 150 mg NaH2PO2.H2O at 450 deg C for 1 h in nitrogen.p002-p006 / journal pages 19055-19059 · Experimental; Results and discussion · Fig. 2, Fig. 4
NP-150//AC HSC deviceresearch_0269__mat__mat_np150_ac_deviceElectrode · Composite Sample · CompositeTwo-electrode HSC in 2 M KOH, with NP-150 positive electrode and active carbon negative electrode; m(NP-150)/m(AC) = 0.538.p006 / journal page 19059 · Results and discussion · Fig. 5
NP-150 working electroderesearch_0269__mat__mat_ni2p_ni_cElectrode · Composite Sample · CompositeSlurry of NP-150, Super-P carbon black and PVDF in NMP at 80:10:10 coated on graphite and dried at 80 deg C for 24 h.graphite substratep002 / journal page 19055 · Electrochemical measurements
NP-250research_0269__mat__mat_ni2p_ni_cPowder · Target Sample · CompositeNi-MOFs phosphorised/carbonised with 250 mg NaH2PO2.H2O at 450 deg C for 1 h in nitrogen.p002-p005 / journal pages 19055-19058 · Experimental; Results and discussion · Fig. 3, Fig. 4
NP-350research_0269__mat__mat_ni2p_ni_cPowder · Target Sample · CompositeNi-MOFs phosphorised/carbonised with 350 mg NaH2PO2.H2O at 450 deg C for 1 h in nitrogen.p002-p005 / journal pages 19055-19058 · Experimental; Results and discussion · Fig. 3, Fig. 4
NP-50research_0269__mat__mat_ni2p_ni_cPowder · Target Sample · CompositeNi-MOFs phosphorised/carbonised with 50 mg NaH2PO2.H2O at 450 deg C for 1 h in nitrogen.p002, p004 / journal pages 19055, 19057 · Experimental; Results and discussion · Fig. S1c