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In this communication, we report the growth of pure gamma-phase tungsten oxide (γ-WO3) films on a conducting substrate (fluorine-doped tin oxide), followed by heat treatment at 500 °C for 2 h, and finally modification with either silver (Ag0) or platinum (Pt0) metallic nanoparticles. These γ-WO3 thin films can be obtained from a tungsten citrate solution by a drop-coating method, and their surfaces...
The poly(ethylene oxide) (PEO)-based solid polymer electrolyte (SPE) systems consisting of NaBr as a dopant salt are prepared. The stable PEO:NaBr system with 3 wt% of NaBr was subjected to low-energy ion beam irradiation to bring in morphological modification. The irradiated samples are studied using complex impedance spectra to evaluate electrical conductivity and relaxation process in the system...
A series of dye-sensitized solar cell (DSSC) TiO2-(SiO2)100-xNix-GO (TSN) (x = 0.0, 2.5, 5.0, 7.5) films were successfully prepared using a sol-gel method via doctor-blade technique. Tetraethyl-orthosilicate (TEOS), absolute ethanol (C2H5OH), deionized water, and acid ammonia were mixed in one solution. Nickel (II) nitrate hexahydrate (Ni(NO3)2.6H2O) and diethanolamine were added to the prepared solution...
S/Li4Ti5O12 cathode with high lithium ionic conductivity was prepared for Li-S battery. Herein, nano Li4Ti5O12 is used as sulfur host and fast Li+ conductor, which can adsorb effectively polysulfides and improve remarkably Li+ diffusion coefficient in sulfur cathode. At 0.5 C, S/Li4Ti5O12 cathode has a stable discharge capacity of 616 mAh g−1 at the 700th cycle and a capacity loss per cycle of 0.0196%...
Hydrogen production by PEM water electrolysis is one of the most efficient methods, due to the produced high purity of gases, high efficiency, and devoid of harmful emissions. In this study, phosphorus-doped carbon nanoparticles (P-CNPs) were synthesized by spray pyrolysis method in chemical vapor deposition (CVD). The synthesized P-CNPs were used as electron carrier support materials for the preparation...
A ZnO nanofiller-based polymer gel electrolyte was prepared using solution-cast technique by incorporating PVDF-HFP as the polymer, ethylene carbonate (EC)-propylene carbonate (PC) as plasticizers, tetraethylammonium tetrafluoroborate (TEABF4) as salt, and ZnO as nanofiller. A maximum ionic conductivity value 6.3 × 10−3 Scm−1 was obtained by adding 12 wt% of ZnO nanoparticles in complex [{PVDF-HFP...
High electric conductivity and great specific capacitance are demanded for supercapacitor electrodes. In this paper, N-doped graphene (NDG) was synthesized and polymerized with Schiff base transition metal conductive polymer–poly[Ni(salen)] (P@NDG) via a cyclic voltammetry method to address the issues above. The microstructure of different support electrodes and composite electrodes was observed by...
For the first time, a sensitive and selective method for determination of docetaxel (as an anti-cancer drug) at gold nanoparticle-multiwall carbon nanotubes/glassy carbon electrode (Au-MWCNTs/GCE) was suggested using cyclic voltammetry and differential pulse anodic stripping voltammetry (DPASV) method. After the construction of the electrochemical sensor and optimization of the effective parameters...
A novel unique C@SnS2 core-shell structure composites consisting of well-dispersity carbon microspheres and ultrathin tin disulfide nanosheets were successfully synthesized for the first time through a simple solvothermal method. The thin SnS2 nanosheets grew onto the carbon microspheres surfaces perpendicularly and formed the close-knit porous structure. When it was used as anode materials for lithium-ion...
The present study investigates the ion transport properties and structural analysis of plasticized solid polymer electrolytes (SPEs) based on carboxymethyl cellulose (CMC)-NH4Br-PEG. The SPE system was successfully prepared via solution casting and has been characterized by using electrical impedance spectroscopy (EIS), Fourier transform infrared (FTIR) spectroscopy, and x-ray diffraction (XRD) technique...
The effect of the Nb5+ substitution with a charge-compensated strategy in lithium-rich layered oxides (LLOs) Li1.2Ni0.13+xCo0.13-xMn0.54-xNbxO2 (x = 0, 0.01, 0.02, and 0.03) has been investigated systematically. A hydroxide co-precipitation method followed by a high-temperature solid-state reaction is adopted in the synthesis process. Structural characterization confirms that the low dose substituting...
In this paper, MOF-derived N-doped porous carbon anchoring Sn4P3 (Sn4P3@NPC) composite is prepared via a low-temperature phosphidation reaction with SnO2@NPC composite as the precursor. The as-prepared Sn4P3@NPC composite exhibit a high stable capacity of 319 mAh g−1 at 0.1 A g−1 after 100 cycles and improved rate performance (the capacities of 365, 322, 260, 204, and 146 mAh g−1 at 0.1, 0.2, 0.5,...
Ionic liquid-gated organic transistors have been reported to have high mobility and low operational voltage; they mainly benefit from the capacitance of electric double layers (EDLs) at the interface of an electrolyte and a semiconductor. Although the capacitance of EDLs is usually considered a fixed value, contrary to the theory of EDLs, EDL capacitance is tunable by the electrode potential. In this...
Cyclic voltammetry and square wave voltammetry were used to investigate reduction mechanism of Ti(IV) on the iron electrode surface in NaCl-KCl-NaF molten salt system. It indicated that the Ti(IV) ions were reduced to titanium metal by three steps, Ti(IV) → Ti(III) → Ti(II) → Ti, and the reduction process was irreversible process controlled by diffusion. The nucleation mechanism of titanium ions on...
Herein, we present the use of lithium tetrafluoroborate (LiBF4) as an electrolyte salt for wide-temperature electrolytes in lithium-ion batteries. The research focused on the application of blend salts to exhibit their synergistic effect especially in a wide temperature range. In the study, LiCoO2 was employed as the cathode material; LiBF4 and lithium difluoro(oxalate)borate (LiODFB) were added to...
In Li-ion technology, increasing electrode loading (thickness) is one approach to improve performance; however, this approach typically compromises power density and safety. To achieve the goal of decoupling energy and power density, a novel electrode architecture is proposed. The electrode design enhances uniform ionic current, especially in thick electrodes. A highly ordered and hierarchical (HOH)...
Porous carbon has high specific area and total pore volume but weak interaction with dissolved polysulfides. Conductive polar metal compound has strong chemical adsorption of polysulfides but difficult to attain high porosity to encapsulate sulfur series. Instead of efforts on the cathode, we prepared a composite made up of titanium nitride and three-dimensional micro-/mesoporous carbon by a facile...
Hydrogen storage capacities were investigated for two forms of MoO3 nanomaterial, amorphous of low crystallinity, and other highly crystalline, using the quartz crystal microbalance technique. Effect of a catalytic Pd capping on the nanomaterials was evaluated. MoO3 materials were grown using the gas condensation method, and both the amorphous and crystalline samples were composed of orthorhombic...
In this work, Li2ZrF6, a lithium salt additive, is reported to improve the interface stability of LiNi0.5Mn1.5O4 (LNMO)/electrolyte interface under high voltage (4.9 V vs Li/Li+). Li2ZrF6 is an effective additive to serve as an in situ surface coating material for high-voltage LNMO half cells. A protective SEI layer is formed on the electrode surface due to the involvement of Li2ZrF6 during the formation...
Here, we proposed a rational design of a plumage-like MnO2@NiCo2O4 core–shell architecture by a mild hydrothermal and chemical bath deposition method. The hierarchical structure comprises the stable “scaffold” of the MnO2 nanowires and the high-activity “fluff” of ultrathin NiCo2O4 nanosheets. Besides, considering the cost of nickel and cobalt elements, the content of NiCo2O4 was controlled within...
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