A High Capacity All Solid-State Li-Sulfur Battery Enabled by Conversion-Intercalation Hybrid Cathode Architecture

As demands for electrochemical energy storage continue to rise, alternative electrochemistries to conventional Li-ion batteries become more appealing. Here, an intercalation-conversion hybrid cathode that combines intercalation-type VS₂ with conversion-type sulfur chemistry to construct high performance solid-state lithium-sulfur batteries is reported. The layered VS₂ nanomaterial features Li-ion transport channels, metallic conductivity, and active capacity contribution, all of which provide an ideal platform for the solid state S/Li₂S redox couple to unlock its high gravimetric capacity. The S/VS₂/Li₃PS₄ hybrid cathode composite is prepared by a facile, low-cost, and low-energy mechanical blending process. The S/VS₂/Li₃PS₄|Li₃PS₄|Li/In (or Li) all-solid-state cell exhibits sulfur utilization of ≈85%, with a Coulombic efficiency of close to 100%. High areal capacity up to 7.8 mA h cm⁻² with an active material loading (S/VS₂) as high as 15.5 mg cm⁻² is achieved.     

Various Types of Combustion of a Ti + C Granular Mixture with a Different Content of the Gasifying Additive

Combustion, Explosion, and Shock Waves - This paper touches upon the effect of a polyvinyl butyral content (0–2.3%) on the combustion of a Ti + C granular...     

Combustion behavior of a Ti + TiC mixture in a nitrogen coflow

Combustion of powder and granular mixtures of TiC + Ti in a quartz tube purged with nitrogen was studied. Mixtures based on fine and coarse-grained TiC were used. It is found that purging of a powder mixture of bulk density with fine titanium carbide with nitrogen coflow does not lead to the spread of the flame front, whereas granular mixtures burn at the same pressure difference. Mixtures based on coarse-grained titanium carbide powder burn in both powder and granular form. The burning rate of a granular mixture of TiC + Ti with coarse-grained titanium carbide is significantly higher than when using fine titanium carbide. It is shown that in the case of a coarse-grained TiC, granulation of the mixture of TiC + Ti significantly improves the degree of nitriding of the synthesis products compared to the powder mixture. During combustion of granular mixtures of TiC + Ti, in contrast to powder mixtures of the same composition, a singlephase product of approximate composition TiC_0.5N_0.44 is formed as a result of synthesis.     

Program auto parallelizer and vectorizer implemented on the basis of the universal translation library and LLVM technology

The paper is devoted to the integration of the compiler based on the LLVM library with the tools created using the Universal Translation Library (UTL)—automatic parallelizer and vectorizer. The intermediate representations used in the libraries to be integrated are analyzed and compared. Mechanisms which had to be implemented for integration are described. The most important UTL components are also presented. Finally we present comparative performance tests of the compilation system obtained as a result of this integration, and available compilers. These tests were run on multi-core systems based on ARM and x86 architectures using SPEC/CPU2006 and NAS Parallel Benchmarks packages.     

Initiation of a gas volume above the boundary of a gas–liquid medium by a bubble wave detonation

It is shown that detonation can be transmitted from a reacting bubble medium into an explosive gas volume located above the interface. Experiments were performed in which bubble detonation was initiated by wire explosion in a gas–liquid medium. The dynamics of the boundary of the gas–liquid medium after the arrival of the bubble detonation wave at it was studied. The distance between the wire and the boundary of the bubble medium was decreased to 1 cm, at which the gas volume was initiated by the hot products from the wire explosion and the discharge plasma. The probability of detonation transmission from the bubble medium to the volume of the gas mixture depending on the depth of immersion of the wire is determined, and the mechanisms of ignition of the explosive gas volume are described.