[en] Highlights: • OLi₃O⁻ is designed by interaction of OLi₃ superalkali with O atom. • OLi₃O⁻ is more basic than LiO⁻, the strongest base known to date. • OLi₃O⁻ is kinetically and thermodynamically stable. • OLi₃O⁻ can be synthesized by the gas phase reaction of Li₂O and LiO⁻. LiO⁻ (proton affinity = 1785 kJ/mol) is the strongest base reported in the literature, followed by CH₃⁻ (proton affinity = 1743 kJ/mol). Using ab initio and DFT calculations, we propose the design of a novel base OLi₃O⁻, by interacting OLi₃ superalkali with O atom, which is even more basic than LiO⁻. The proton affinity of OLi₃O⁻ isomers lies in the range 1803–1928 kJ/mol. This strongest base is kinetically and thermodynamically stable, which can be synthesized by reacting Li₂O with LiO⁻ at least in gas phase. This study may provide suitable path to the experimentalists to further explore this novel species.

[en] Thermochemical quantities for the formation of Li₂SnO₃(s) have been determined by the third-law treatment on the basis of the reported partial vapor pressures of Li(g), O₂(g), LiO(g), Li₂O(g), and SnO(g) in equilibrium with Li₂SnO₃(s). The enthalpy, Gibbs energy and entropy of formation from the elements are Δ_fH₂₉₈ (Li₂SnO₃,s)=-(1322±13) kJ mol^-1, Δ_fG₂₉₈ (Li₂SnO₃,s)=-(1225±13) kJ mol^-1 and Δ_fS₂₉₈ (Li₂SnO₃,s)=-(326±62) J K^-1mol^-1, respectively. A value for the enthalpy of formation from the constituent oxides Li₂O(s) and SnO₂(s) has also been obtained: Δ_foxH₂₉₈ (Li₂SnO₃,s)=-(143±13) kJ mol^-1. In the Li₂O-SnO₂ system, the thermochemical stability of Li₂SnO₃(s) is probably better than that of Li₈SnO₆(s). Comparison of these results was also made with those of other lithium-containing complex oxides. (orig.)

[en] An analysis of the different surface reactions taking place in Li₂O was performed in order to determine whether adsorption and desorption of tritium are first or second order reactions. Data from BEATRIX-II Phase I and CRITIC-I were used as basis for calculations. It was found that only second order adsorption/desorption on the surface of Li₂O can predict the tritium behavior observed experimentally

[en] Tritium release from the candidate ceramic materials, Li₂O, LiA10₂, Li₂SiO₃, Li₄SiO₄ and Li₂ZrO₃, is being investigated in many blanket programs. Factors that affect tritium release from the ceramic into the helium sweep gas stream include operating temperature, ceramic microstructure, tritium transport and solubility in the solid. A review is presented of the material properties studied and of the irradiation programs and the results are summarized. The ceramic breeder blanket concept is briefly reviewed

[en] Short communication. Nine breeder blanket concepts were studied by CFFTP to estimate blanket temperature profiles under similar operating conditions

[en] Lithium oxide as a fusion blanket material has neutronic advantages but various design limitations. The study was undertaken to investigate the design implications, to demonstrate how the limitations can be overcome and to provide guidance for future development. The study included lithium oxide properties, tritium control, coolant chemistry, blanket engineering and blanket neutronics. (author)

[en] The energy of preference of ion Li⁺ to octahedral position in the rock salt structure, E = -10 kcal/g-ion, was estimated from heats of formation of LiFeO₂, LiAlO₂ and Li₂TiO₃. The heats of formation of the LiVO₂, LiCrOL₂, LiCoO₂, and LiMnO₂ compounds were calculated from the corresponding oxides (-13--m14 kcal/mole)

[en] The release of tritium from neutron irradiated spherical samples of single crystal Li₂O was measured by isothermal annealing experiments. The release is shown to be controlled by diffusion of tritium in the solid under appropriate experimental conditions. Deviations from solely diffusion controlled release were observed when traces of water were present in the He-purge gas used in the experiments. (orig./RW)

[en] We present an analytical theory for the large-phase-shift, thick Z-scan transmittance, which could be applied to a wide range of medium thickness from the thin sample limit to a thick medium and to small and large nonlinear phase shifts. The theoretical results were experimentally verified for in photorefractive LiNbO3:Fe crystals by using two kinds of closed-aperture Z-scan measurements with a Ti-sapphire laser source (λ = 810 nm): (1) sample-thickness-dependent Z-scans with thin and thick samples and (2) normalized-thickness-factor-dependent Z-scans with different external lenses having different focal lengths in the same thick LiNbO3:Fe crystal.

[en] The MCMB-Li₄Ti₅O₁₂ with core-shell structure was prepared by sol-gel process to improve low cycle capability of MCMB in this study. The electrochemical characteristics were investigated for hybrid capacitor using MCMB-Li₄Ti₅O₁₂ as the negative electrode and LiMn₂O₄, Active carbon fiber as the positive electrode. The electrochemical behaviors of hybrid capacitor using organic electrolytes (LiPF₆, EC/DMC/EMC) were characterized by charge/discharge, cyclic voltammetry, cycle and impedance tests. The hybrid capacitor using MCMB-Li₄Ti₅O₁₂/LiMn₂O₄ electrodes had better capacitance than MCMB hybrid systems and was able to deliver a specific energy with 67 Wh/kg at a specific power of 781 W/kg