Li-O2 batteries offer a high theoretical discharge capacity due to the formation of light discharged species such as Li2O2, which fill porous positive electrode. However, in practice, it is challenging reach and completely utilize full electrode pore volume during discharge. With products, medium evolves, porosity tortuosity factor are altered through shrinkage clogging pores. A shrinks solid p...

The optimization of the calendering process represents one key tasks for tuning lithium-ion battery performance. In this study, we present a systematic statistical-based study three main parameters (namely, applied pressure, roll temperature, and line speed) effect on porosity, electrode mechanical properties electronic conductivity. Our work goal is to understand how by changing parameters, ca...

Various polymer coatings have been investigated for the protection of mercury thin-film electrodes in the square wave anodic stripping voltammetry of environmental samples using batch injection analysis, with injection of untreated samples of volume 50 ml directly over the sensing electrode. Polymer coatings studied include those with controlled porosity, and cation-exchange polymers based on s...

Li₄Ti₅O₁₂/activated carbon hybrid supercapacitor can combine the advantages of both lithium-ion battery and supercapacitor, which may meet the requirements for developing high-performance hybrid electric vehicles. Here we proposed a novel "core-shell" porous graphitic carbon (PGC) to replace conventional activated carbon for achieving excellent cell performance. In this PGC structure made from ...

Conjugated microporous polymers are a unique class of polymers that combine extended π-conjugation with inherent porosity. However, these polymers are synthesized through solution-phase reactions to yield insoluble and unprocessable solids, which preclude not only the evaluation of their conducting properties but also the fabrication of thin films for device implementation. Here, we report a st...

Here we report on a new architecture for potentiometric NO2 sensors that features thin 8YSZ electrolytes sandwiched between two porous (La0.8Sr0.2)0.95MnO3 (LSM95) layers-one thick and the other thin-fabricated by the tape casting and co-firing techniques. Measurements of their sensing characteristics show that reducing the porosity of the supporting LSM95 reference electrodes can increase the ...

Two-dimensional metal-organic frameworks represent a family of materials with attractive chemical and structural properties, which are usually prepared in the form of bulk powders. Here we show a generic approach to fabricate ultrathin nanosheet array of metal-organic frameworks on different substrates through a dissolution-crystallization mechanism. These materials exhibit intriguing propertie...

Electrochemical analysis allows in situ characterization of solid oxide electrochemical cells (SOCs) under operating conditions. However, the SOCs that have been analyzed in this way have ill-defined or uncommon microstructures in terms of porosity and tortuosity. Therefore, the nano-scale characterization of SOCs with respect to three-phase boundaries has been hindered. We introduce novel in s...

The porosity of a zone can be estimated either from a single “porosity log” (sonic, density, neutron, or magnetic resonance log) or a combination of porosity logs, in order to correct for variable lithology effects in complex reservoirs. In the carbonates, mineral mixtures are primarily drawn from calcite, dolomite, and quartz (either as sand grains or as chert); anhydrite and gypsum may also o...

The electrochemical properties of polymerized aniline (PANI) and melamine (PMEL) that were copolymerized (PANIMEL) on a glassy carbon electrode (GCE) had been coated with functionalized multiwalled nanotubes (fMWCNT) to form PANIMEL/fMWCNT/GCE film studied, an aim toward energy storage (EES). A number factors, such as the choice working electrode, electrolyte, switching potential, applied scan ...