Dominant Li+ ion conduction in Li+/Na+ mixed crystal, 15NaI∙LiBH4

Journal of Solid State Electrochemistry - In the present work, the conduction ions in 15NaI∙LiBH4 are investigated by secondary ion mass spectroscopy (SIMS) and galvanostatic measurements. An...     

Improvement of Li+ conductivity in ball-milled LiI and the local structure analysis by pair distribution function based on X-ray total scattering

Journal of Solid State Electrochemistry - The effects of ball milling on the ionic conduction properties of LiI are investigated. It is found that ball milling drastically increased the...     

Li<Superscript>+</Superscript> ionic conduction properties on NaI doped with a small amount of LiBH<Subscript>4</Subscript>

In the present work, Li⁺ conductor is synthesized via small doping of LiBH₄ into “Li-free” compound (or solid solvent), NaI. The formation of solid solution between NaI and LiBH₄ is confirmed by XRD measurement, and the solubility limit of LiBH₄ exists between 6 to 13 mol%. The value of σ for 15NaI·LiBH₄ (6 mol% LiBH₄) showed 1.7 × 10^?6 S/cm at room temperature, which is comparable to that for LiI. From the plot of log σT vs. 1000/T, an activation energy for Li⁺ conduction in NaI is estimated to be 0.68 and 0.32 eV for heating and cooling cycle, respectively. The results of AC impedance measurement and DC polarization test indicate that Li⁺ plays a major role in ionic conduction in NaI regardless of the slight molar fraction of Li⁺. The present results suggest that the expansion in the material choice for solid solvent and other alkali halides can also work as a base material for Li⁺ ion conductors.     

Geometric and electronic structures of NO dimer layers on Rh(111) studied with near edge x-ray absorption fine structure spectroscopy: experiment and theory

Adsorption of NO on the Rh(111) surface has been studied in the monolayer, bilayer, and multilayer regimes with near edge x-ray absorption fine structure (NEXAFS) spectroscopy. NO dimer layers are formed on a chemisorbed monomer layer. The polarization dependence in the NEXAFS spectra of the dimer components has contradicted the previous assignments. To determine the structure of the NO dimer layers from the polarization analysis of the NEXAFS spectra, ab initio configuration interaction calculations have been carried out for some low-lying core excited states of the weakly bound NO dimer with cis-ONNO planar geometry. It is revealed that the NO dimers in the multilayer are standing with the N-N bond perpendicular to the surface, while in the second layer they are rather lying on the first monomer layer.     

Comprehensive GMO detection using real-time PCR array: single-laboratory validation

We have developed a real-time PCR array method to comprehensively detect genetically modified (GM) organisms. In the method, genomic DNA extracted from an agricultural product is analyzed using various qualitative real-time PCR assays on a 96-well PCR plate, targeting for individual GM events, recombinant DNA (r-DNA) segments, taxon-specific DNAs, and donor organisms of the respective r-DNAs. In this article, we report the single-laboratory validation of both DNA extraction methods and component PCR assays constituting the real-time PCR array. We selected some DNA extraction methods for specified plant matrixes, i.e., maize flour, soybean flour, and ground canola seeds, then evaluated the DNA quantity, DNA fragmentation, and PCR inhibition of the resultant DNA extracts. For the component PCR assays, we evaluated the specificity and LOD. All DNA extraction methods and component PCR assays satisfied the criteria set on the basis of previous reports.     

All-solid-state half-cell of Li/a-Si film using guest Li+ conductor 15NaI∙LiBH4 as a solid electrolyte

Journal of Solid State Electrochemistry - In the present study, an all-solid-state half-cell Li/ amorphous Si (a-Si) was fabricated using the guest Li+ ion conductor (15NaI∙LiBH4) as a solid...     

A highly plastic Li+ ion conductor based on the KI-KBH4 solid solvent system

Journal of Solid State Electrochemistry - In the present work, the dominant Li+ conduction in 6&nbsp;mol% LiI-doped KI-KBH4 solid solvent was verified by electrochemical measurement and...     

N+NO reaction on Rh(111) surfaces studied with fast near-edge X-ray absorption fine structure spectroscopy: role of NO dimer as an extrinsic precursor

We studied the mechanism of the N+NO reaction on Rh(111) surfaces by means of fast near-edge X-ray absorption fine structure spectroscopy. This reaction is important as a basis of NOx reduction reactions on platinum-group metal surfaces. Atomic nitrogen layers on Rh(111) were titrated with NO at various temperatures. N2O is exclusively formed and desorbs into the gas phase below 350 K. The consumption rate of atomic nitrogen exhibits strange temperature dependence between 100 and 350 K; the reaction proceeds slower with increasing temperature. Reaction kinetics analyses and isotope-controlled experiments have revealed that the surface N atoms do not react with chemisorbed NO molecules but with NO dimers weakly bound on top of the chemisorbed layer, which play a role as an extrinsic precursor. The present results may support the possibility that NO dimers participate in various NO-related synthetic, biochemical, and surface reactions as an intermediate.     

Charge–discharge performances of Li–S battery using NaI–NaBH4–LiI solid electrolyte

Journal of Solid State Electrochemistry - In this study, Li–S batteries were fabricated using 9(15NaI∙NaBH4)∙LiI as the solid electrolyte, and their charge–discharge...