ZIF-8 is a zeolitic imidazolate framework with very good thermal and chemical stability that opens up many applications are not feasible by other metal-organic frameowrks (MOFs) zeolites. Several works report the adsorption properties of for strategic gases. However, despite vast experimental corpus data reported, there seems yet to be dearth in understanding gas properties. In this work we provide insights at molecular level on mechanisms governing structural deformation during adsorption....

The high stability of the outer surface composition in dual concentration gradient Li[Ni_0.64Co_0.06Mn_0.30]O₂is responsible for reduced resistances by decreasing electrolyte reaction.

Organic photoactive materials are promising candidates for the generation of solar fuels in terms efficiency and cost. However, their low stability aqueous media constitutes a serious problem technological deployment. Here we present organic photocathodes hydrogen with outstanding stability. The device design relies on use water-resistant selective contacts, which protect P3HT:PCBM layer. An insoluble cross-linked PEDOT:PSS hole-selective layer avoids delamination film, an electron-selective...

A Cu2 O-TiO2 photoelectrode is pr+oposed for simultaneous solar light energy harvesting and storing of electrochemical in an adapted lithium coin cell. The p-type O semiconductor layer the harvester component TiO2 film performs as capacitive layer. rationale scheme shows that photocharges generated induce lithiation/delithiation processes a function applied bias voltage power. photorechargeable button cell drilled on one side recharges with visible white ≈9 h open circuit. It provides...

The investigation of the lithiation–delithiation kinetics anodes comprising carbon-coated ZnFe2O4 nanoparticles is reported in here. study confirmed that, as occurring with other conversion electrodes, lithiation a multistep process involving presence intermediate Li–Zn–Fe–O phases precursors for formation amorphous Li2O. A detailed knowledge on reaction involved electrochemical mechanisms has been achieved by using impedance spectroscopy. It observed that reactions introduce long delay...

Efficient solar-to-fuel conversion could be a cost-effective way to power the planet using sunlight.

The development of solar energy storage strategies is a key step for handling the inherent variability sunlight within global solar-based model. In present study, we have developed photocapacitive device based on heterostructured BiVO4–PbOx system. BiVO4 provides photoactive core device, while PbOx nanoparticles (formed by controlled oxidation colloidal PbS quantum dots) furnish capacitive platform redox pseudocapacitance. synergistic coupling these two systems leads to high capacitance...

Electrochemical impedance spectroscopy is a widely employed technique probing kinetic limitations in the charging of battery electrodes. Hindrance mechanisms locate at interfaces between active material and electrolyte, bulk reacting compound. Rate-limiting are viewed as resistive circuit elements can be extracted using standard analyzers. Classical models consider charge transport, mainly ion diffusion slower carrier, principal limitation impeding full electrode charging. This indeed case...

Harnessing the untapped potential of solar energy sources is crucial for achieving a sustainable future, and accurate maximum-power-point tracking cells vital to maximizing their power generation. This article introduces power-tracking algorithm cost-effective hardware long-term operational stability measurements in perovskite cells. Existing algorithms photovoltaic technology lead suboptimal performance when applied most stable devices (for example, triple-mesoscopic...

A family of Metal–Organic Frameworks (MOFs) based on the ligands pyrazine (pyz) and dicyanamide (dca) metal centers Fe, Co Ni with unit formula M(dca) 2 pyz has been studied as anodes for Li-Ion Batteries (LIBs).

Up-conversion (UC) of infrared (IR) photons into visible radiation constitutes a promising strategy to enhance the light harvesting efficiency photovoltaic and photoelectrochemical devices. In present study, we integrate Er3+/Yb3+-codoped yttrium oxide (Y2O3) submicrometric particles with outstanding up-conversion properties mesoporous titanium (TiO2) structures sensitized cadmium selenide (CdSe) for solar hydrogen generation. We demonstrate that incorporation these up-converting (UCP) leads...

Abstract A new approach on the synthesis of Si anodes for Li‐ion batteries is reported, combining advantages both nanoparticulated and continuous films. multilayered configuration prototype proposed, comprising amorphous arranged in nanostructured, mechanically heterogeneous films, interspersed with Ta nanoparticle scaffolds. Particular structural features such as increased surface roughness, nanogranularity, porosity are dictated by scaffolds, boosting lithiation process due to fast Li...

We have explored the photoelectrochemical behavior of carbon/titania composites, aiming at understanding mechanisms photoinduced processes occurring in such hybrid photocatalysts that lead to enhanced photocatalytic efficiencies pristine semiconductor for photodegradation refractory pollutants water. In a first step, spectrometric techniques been applied investigate structural and optical properties carbon/semiconductor composites compared intrinsic characteristics unsupported semiconductor....

Si nanotubes for reversible alloying reaction with lithium are able to accommodate large volume changes and offer improved cycle retention reliable response when incorporated into battery anodes. However, nanotube electrodes exhibit poor rate capability because of their inherently low electron conductivity Li ion diffusivity. Si/Ge double-layered show promise improve structural stability electrochemical kinetics, as compared homogeneous arrays. The mechanism explaining the enhancement in...