CoNi₂S₄/graphene nanocomposite electrodes exhibit excellent pseudocapacitance behavior enhanced by synergistic effect, demonstrating the nanocomposite's promise as an electrode material for high-performance supercapacitors.

Hierarchical Ni(OH) 2 –MnO hollow spheres are prepared via a simple self-templating route. The structural and compositional advantages of the material endow it with remarkable performance as supercapacitor.

Light-scattering studies of the liquid-glass transition ${\mathrm{Ca}}_{0.4}$${\mathrm{K}}_{0.6}$(${\mathrm{NO}}_{3}$${)}_{1.4}$ have been carried out from 305 to 23\ifmmode^\circ\else\textdegree\fi{}C. Composite spectra covering over four decades in frequency were obtained by combining data with a Sandercock tandem Fabry-P\'erot interferometer and Raman spectra. Two-step relaxation processes observed supercooled liquid near glass transition. The \ensuremath{\alpha} exhibits...

The liquid-glass transition dynamics of the molecular glass Salol has been studied by light-scattering spectroscopy from 383 to 198 K. Analysis wide-frequency-range composite spectra revealed relaxation 0.2 GHz 3.5 THz. A two-step process was observed near crossover temperature ${\mathit{T}}_{\mathit{c}}$\ensuremath{\sim}256 K which is about 40 above glass-transition ${\mathit{T}}_{\mathit{g}}$. \ensuremath{\beta}-relaxation well described scaling predictions mode-coupling theory in both...

Hybrid asymmetric supercapacitors based on Ni_0.85Se nanosheet arrays and activated carbon show remarkable energy-storage characteristics promising applicable value.

Abstract Single‐crystalline, hexagonal covellite (CuS) nanoplatelets were successfully synthesized through a facile, inexpensive, reproducible, and improved solvothermal process in toluene at 120 °C for 24 h with hexadecylamine as capping agent copper acetate carbon disulfide precursors. These are about 26±1.5 nm diameter 8±1.2 thick, have tendency to self‐assemble into pillarlike nanostructures face‐to‐face stacks, raftlike side‐by‐side arrays, stratiform layer‐by‐layer self‐assembly. The...

Porous ZnO–NiO composite micropolyhedrons have been successfully synthesized by calcination of mixed oxalate (Zn0.9Ni0.1(C2O4)2·nH2O) precursors in air. The precursor were a mild chemical precipitation method without any template or surfactant, and found to relatively low decomposition temperature. We explored the application resulting porous as electrochemical capacitors. Electrochemical study shows that obtained composites under different conditions supercapacitor properties 3.0 1.0 M KOH...

A one-step solvothermal process is developed to synthesize novel CoNi2S4 nanoparticles. When applied as electrode materials of supercapacitors, nanoparticles with lower cost production exhibit better electrochemical performances, i.e.: higher specific capacitance, rate capability, and energy density which make it a promising candidate material for next generation supercapacitors.

Polypyrrole nanowires are facile synthesized under a mild condition with FeCl3 as an oxidant. the width of 120 nm form many nanogaps or pores due to intertwined nanostructures. More importantly, PPy were further applied for supercapacitor electrode materials. After electrochemical testing, it was observed that nanowire based showed large specific capacitance (420 F g−1, 1.5 A g−1) and good rate capability (272 18.0 g−1), which is larger than most published results. The as-prepared can work...

Ultrathin cobalt phosphate (CoHPO4·3H2O) nanosheets are successfully synthesized by a one pot hydrothermal method. Novel CoHPO4·3H2O ultrathin assembled for constructing the electrodes of supercapacitors. Benefiting from nanostructures, as-prepared electrode shows specific capacitance 413 F g−1, and no obvious decay even after 3000 charge–discharge cycles. Such quasi-two-dimensional material is new kind supercapacitor with high performance.

NiS₂ and α-NiS hollow spheres are prepared <italic>via</italic> a template-free method. When were evaluated for supercapacitors, glucose sensors water treatment, it was found that the exhibited better performance than NiS₂.

Single crystalline ZnO nanorods with a diameter of about 5 nm were synthesized without the presence any surfactants in ethanol solvent at room temperature. Nanodots and different size shape could be observed by TEM via simply altering NaOH concentration reaction time. The polar nanorod growth mechanism was discussed 'Ostwald ripening' mechanism. Optical absorption photoluminescence properties have been characterized. UV spectrum revealed clear blue-shift single peak centred 350 nm.

Recently reported light-scattering studies of ${\mathrm{CaKNO}}_{3}$ and Salol are reanalyzed, using the extended version mode-coupling theory liquid-glass transition including activated transport or hopping effects. Problems found in original fits due to neglect terms largely corrected, quantitative predictions for susceptibility minimum below crossover temperature ${\mathit{T}}_{\mathit{c}}$ found. The results also shown accurately explain neutron spin-echo data by Mezei [J. Non-Cryst....

Depolarized light-scattering spectra of propylene carbonate were obtained in the frequency range 0.2 GHz--4 THz at temperatures from 350 to 135 K. Analysis resulting susceptibility revealed reasonable agreement with predictions idealized mode coupling theory, yielding critical exponents a=0.29, b=0.50, and an exponent parameter \ensuremath{\lambda}=0.78\ifmmode\pm\else\textpm\fi{}0.05. A scaling analysis demonstrated slowing down frequencies both above below ${\mathit{T}}_{\mathit{C}}$,...

Ultrathin β-In2S3 nanobelts have been successfully synthesized via a facile improved solvothermal route. The crystal phase, morphology, lattice and composition of as-prepared products were characterized by XRD, FESEM, TEM, HRTEM EDS, respectively. Results revealed that the as-synthesized are in cubic structure 50−90 nm width, 13 ± 2 thickness, overall length even up to several microns. A possible shape evolution growth mechanism was suggested, formation resulted from preferential along ⟨220⟩...

Colloidal, monodisperse, single-crystalline pyramidal CuInS2 and rectangular AgInS2 nanocrystals were successfully synthesized through a convenient improved solvothermal process that uses hexadecylamine as capping reagent. The crystal phase, morphology, lattice, chemical composition of the as-prepared products characterized by using X-ray diffraction, transmission electron microscopy (TEM), high-resolution TEM, energy dispersive spectroscopy. Results revealed as-synthesized colloid is in...

Abstract α‐NiS and β‐NiS hollow spheres were successfully synthesized via the Kirkendall effect under different hydrothermal conditions. The obtained evaluated as electrode materials for supercapacitors. Importantly, sphere has a large specific capacitance (562.3 F g −1 at 0.60 A ) good cycling property (maintaining about 97.5 % 2.4 after 1000 cycles). Furthermore, as‐prepared applied to construct electrochemical glucose sensors. Especially, exhibit sensitivity (155 μA mM cm −2 ), low...

Single-crystalline, hexagonal tin disulfide (SnS2) nanoplatelets were successfully synthesized through an improved solvothermal process with SnCl4·5H2O and carbon (CS2) as precursors. The crystal phase, morphology, lattice of the prepared products characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution (HRTEM), respectively. Results reveal that SnS2 are in structure 20–60 nm diameter 7–10 thickness. structural HRTEM analysis indicates...