Jia S., Wei J., Gong B. et al. · Journal of Colloid and Interface Science · 2021 · 640-649
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
The r-NiCo2S4-6 HSs // N/S-AC all-solid-state hybrid device delivers high energy density, cycle stability, and bending robustness.
Caveat: Device results are application-level rather than intrinsic material conductivity measurements.
main p.9 · 4. Conclusions · Fig. 7 · Linked to 6 structured results
NaBH4 reduction enriches sulfur vacancies while preserving the cubic NiCo2S4 crystal phase.
Caveat: Vacancy concentration is inferred from EPR and XPS deconvolution rather than directly quantified crystallographically.
main p.4 · 3. Results and discussion · Fig. 3 and Fig. 4 · Linked to 4 structured results
The hollow porous shell supplies internal/external active sites and shorter ion/electron transport paths, supporting higher capacity and kinetics.
Caveat: The pore structure is described by microscopy; no BET surface area or pore-size distribution is reported in the available text.
main p.7 · 3. Results and discussion · Fig. 2, Fig. 6 · Linked to 5 structured results
Ni-Co coordination polymer spheres act as self-templates; sulfidation proceeds through inward S2- and outward Ni2+/Co2+ diffusion to yield NiCo2S4 hollow spheres.
Caveat: SI images supporting the time-evolution mechanism are not available in the assigned render set; claim is based on SI text paragraph.
SI text · Figure S4 paragraph · Fig. S4 · Linked to 1 structured result
Enriched sulfur vacancies reduce band gap, improve carrier density/electronic conductivity, and lower electrochemical resistance.
Caveat: Electronic conductivity is only reported qualitatively from I-V slope; no absolute conductivity value is available in the provided documents.
main p.6 · 3. Results and discussion · Fig. S8, Fig. S11, Fig. 5f · Linked to 7 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| r-NiCo2S4-6 HSs // N/S-AC all-solid-state hybrid supercapacitor | r-NiCo2S4-6 HSs // N/S-AC with PVA-KOH gel electrolyteNi and Co in positive electrode | unknown · CompositeTwo-electrode all-solid-state hybrid supercapacitor using r-NiCo2S4-6 HSs positive electrode and N/S-AC negative electrode. | main p.8 · 3. Results and discussion · Fig. 7a |
| Ni-Co coordination polymer spheres | Ni-Co isophthalate coordination polymer, exact formula not reportedNi and Co ions from nickel nitrate hexahydrate and cobalt nitrate hexahydrate · isophthalic acid (H2IPA) | unknown · PristineAmorphous mixed-metal coordination polymer spheres; FTIR red shift supports metal-linker coordination. | main p.2 · 2.2. Synthesis of Ni-Co CPs; 3. Results and discussion · Fig. S1-S3 |
| NiCo2S4 hollow spheres | NiCo2S4Ni and Co in nickel-cobalt sulfide | 0D · DerivedCubic NiCo2S4 phase indexed to JCPDS #20-0782; hollow-sphere morphology from sulfidation of Ni-Co CPs. | main p.3 · 2.3. Synthesis of NiCo2S4 HSs · Fig. 3a, Fig. S4-S6 |
| N/S co-doped activated carbon nanosheets | N/S-AC | 2D · DerivedN/S co-doped activated carbon nanosheets used as capacitive negative electrode; synthesis referred to previous work. | main p.3 · 2.6. Electrochemical performances measurements · Fig. S12-S14 |
| sulfur-vacancy-rich NiCo2S4 hollow spheres | r-NiCo2S4Ni and Co in nickel-cobalt sulfide | 0D · DerivedNaBH4-reduced cubic NiCo2S4 hollow spheres with enriched sulfur vacancies and retained hollow morphology. | main p.2 · Abstract · Fig. 2-Fig. 7 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Ni-Co CP spheresresearch_0443__mat__ni_co_cp | Powder · Pristine Control · Mixed Metal | Brown precipitate from solvothermal acetone/DMF synthesis; washed with ethanol and vacuum dried at 80 C. | main p.2 · 2.2. Synthesis of Ni-Co CPs |
| NiCo2S4-X HSs intermediates (X = 0.5, 1, 2, 4 h)research_0443__mat__nico2s4_hs | Powder · Pristine Control · Mixed Metal | Intermediate sulfidation products from 0.5, 1, 2 and 4 h reactions at 160 C. | SI text · Figure S4 caption and paragraph · Fig. S4 |
| NiCo2S4-6 HSs working electroderesearch_0443__mat__nico2s4_hs | Electrode · Pristine Control · Composite | Unreduced active material electrode prepared with acetylene black/PTFE binder on nickel foam using the same electrode process.nickel foam (1 x 2 cm2) | main p.6 · 3. Results and discussion · Fig. 5 |
| NiCo2S4-6 HSsresearch_0443__mat__nico2s4_hs | Powder · Pristine Control · Mixed Metal | Nickel-cobalt sulfide hollow spheres after 6 h sulfidation at 160 C. | main p.3 · 2.3. Synthesis of NiCo2S4 HSs · Fig. 3-Fig. 5 |
| N/S-AC negative electroderesearch_0443__mat__ns_ac | Electrode · Composite Component · Derived Carbon | N/S co-doped activated carbon nanosheets used as the negative electrode; preparation follows prior work rather than this paper. | main p.3 · 2.6. Electrochemical performances measurements · Fig. S12-S14 |
| r-NiCo2S4-6 HSs working electroderesearch_0443__mat__r_nico2s4_hs | Electrode · Composite Sample · Composite | Active material, acetylene black and PTFE mixed 8:1:1, coated on nickel foam, vacuum dried at 80 C for 12 h, pressed at 8 MPa, and immersed in KOH for 6 h.nickel foam (1 x 2 cm2) | main p.3 · 2.6. Electrochemical performances measurements |
| r-NiCo2S4-6 HSsresearch_0443__mat__r_nico2s4_hs | Powder · Target Sample · Doped | NiCo2S4-6 HSs reduced in 0.1 M NaBH4 aqueous solution for 2 h, washed and vacuum dried at 80 C for 12 h. | main p.2 · 2.4. Reduction of NiCo2S4 HSs |
| r-NiCo2S4-6 HSs // N/S-AC deviceresearch_0443__mat__hybrid_device | Electrode · Composite Sample · Composite | All-solid-state two-electrode hybrid supercapacitor using r-NiCo2S4-6 HSs positive electrode, N/S-AC negative electrode and PVA-KOH gel electrolyte. | main p.8 · 3. Results and discussion · Fig. 7a |