...Yunxiang Wang; Feng Hao Li metal batteries (LMBs) are one of the most promising high-energy-density batteries. However, solid electrolyte interphase (SEI) and Li dendrite substantially form in LMBs. Due to low ionic conductivity, inhomogeneity, and poor mechanical and electrochemical stability...

... weak ionic conductivity, its commercial application has been largely limited. The paper reported that acetylene black was used as the reducing agent and the pure phase nanostructured orthorhombic β-LiVOPO 4 was obtained by carbothermal reduction method. A significant improvement in ionic conductivity...

... of the as-synthesized powders, such as phase evolution, crystalline size, and specific surface area were investigated. The synthesized powders calcined at 900 °C showed a specific surface area of 5 m 2 g −1 and crystalline size of 28.2 nm, and ionic conductivity of 0.07S cm − 1 as measured at 750 °C. An anode-supported...

... in the ionic conductivity of the electrolyte. Furthermore, silica impurities have been shown to damage the anode/electrolyte interface, such that an overall decrease in cell performance and long-term stability is observed. Despite the fact that silica is ubiquitous in commercial-grade raw materials and can...

... conductivities at relatively low temperature 550 ° C . Ionic conductivities were measured with ac impedance spectroscopy and four-probe dc method. The structural and morphological properties of the prepared electrolyte were investigated by scanning electron microscope (SEM). The thermal stability was determined...

...Jianbing Huang; Jinliang Yuan; Zongqiang Mao; Bengt Sundén In recent years, ceria-based composites (CBCs) have been developed as electrolytes for low-temperature solid oxide fuel cells. These materials exhibit extremely high ionic conductivities at 400 – 600 ° C . It has also been found that both...

... electrolytes ionic conductivity Raman spectra scanning electron microscopy sintering solid-state phase transformations vibrations X-ray diffraction yttrium 01 12 2005 27 04 2007 16 01 2008 2008 American Society of Mechanical Engineers ...

... by iodometric titration shows that strontium insertion generates a decrease of the interstitial oxygen. In order to avoid the concomitant decrease of the ionic conductivity, the system underwent heat treatments under high oxygen pressure ( 200 bar , 650 ° C ). As a result, the O 2 − treated La 1.9 Sr 0.1 NiO 4...

... properties investigated, except solubility, increased with increased hydroxide ion concentration. The solubility of Na B O 2 was enhanced by the addition of KOH to the saturated solution, but decreased when LiOH and NaOH were used. The highest ionic conductivity ( 198.27 S ∕ m ) was obtained from...

... of the thickness, whereas the curves obtained with the complete model are different everywhere. This can be explained by Fig. 2 ; since the reaction takes place throughout the electrode, a small ionic current crosses the electrode and, due to the low value of the effective ionic conductivity ( ∼ 1 × 10...

... ) where σ i and σ el denote ionic conductivity and electronic conductivity, P ( O 2 ) ′ and P ( O 2 ) ″ denote partial oxygen pressures at the feed and permeate sides, and T , L , R , and F denote the temperature, membrane...

... were prepared from a NMP solution. These materials, composed of two proton-conducting components, have good mechanical properties, high ionic conductivities ( 10.5 × 10 − 2 S ∕ cm at 80 ° C ) and good fuel cell performances at 70 ° C . Samuelson , L. A. , Anagnostopoulos , A. , Alva...

... temperature promotes the oxygen ion-hopping process that increases the ionic conductivity. A macroscale parametric study was also conducted in this paper to validate the influence of the temperature uniformity in the solid electrolyte by employing the computational fluid dynamics technique. The temperature...

... electro-osmotic drag and diffusion and is solved using a finite volume method for a one-dimensional isothermal system. Transport properties including the water drag and diffusion coefficients and membrane ionic conductivity are expressed as functions of water content and temperature. An analytical...

... simulated matched the experimental data before and after aging. The average current density was found to have a linear relationship to the logarithm of the effective exchange current density. The effect of the effective ionic conductivity of the composite cathode was more apparent for small total effective...

... and experimental observations were made. For the situation modeled and tested, the porosity and ionic conductivity were found to be most influential on performance. More importantly, the effect of porosity is a trade-off between the influence on gas transport and the mixed conductor influence...