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... Solid-state electrolytes that exhibit high ionic conductivities at room temperature are key materials for obtaining the next generation of safer, higher-specific-energy solid-state batteries. However, the number of currently available crystal structures for use as superionic conductors remains limited. Here, we report a lithium superionic conductor, Li₂SiS₃, with tetragonal crystal symmetry, which ...
silicon, etc ; crystal structure; hysteresis; transmittance; Show all 4 Subjects
Abstract:
... Organic–inorganic hybrid perovskite solar cells (PSCs) have attracted enormous research attention due to their high efficiency and low cost. However, most of the PSCs with high efficiencies still need expensive organic materials as their hole-transport layer (HTL). Obviously, the highly expensive materials go against the low-cost concept of advanced PSCs. In this regard, inorganic NiOₓ was conside ...
silicon, etc ; crystallization; electrochemistry; simulation models; Show all 4 Subjects
Abstract:
... Organometallic halide perovskites have drawn tremendous attention for their remarkable photovoltaic properties. We report anion modification for improving annealing-free electrochemical deposition of perovskites under an ambient atmosphere and extending the applications. Relevant theoretical simulation based on the Butler–Volmer functions reveals the mechanism behind: introduced anions raise the e ...
silicon, etc ; crystallization; irradiation; radiation resistance; Show all 4 Subjects
Abstract:
... Influence of the ion irradiation at elevated temperatures on the novel preceramic paper-derived SiCf/SiC laminated composites fabricated by spark plasma sintering was investigated. The composites were subjected to high-dose simultaneous irradiation of silicon (Si) ions at 400 °C. Irradiation induces amorphization of the damaged area up to 30 dpa, and then recrystallization of amorphous regions wit ...
silicon, etc ; alloys; anodes; electrochemistry; nanopores; Show all 5 Subjects
Abstract:
... Regulating the morphology and structure of Si by alloying/dealloying has been proven as an effective way to leverage the Li-storage performance of Si the anode in Li-ion batteries (LIBs). However, the alloying depth is difficult to control and thus the alloy depth-structure relationship is still unclear. Here, we employ the molten-salt electrochemical alloying/dealloying approach to regulate the L ...
Tatyana E. Smolyarova; Lev V. Shanidze; Anna V. Lukyanenko; Filipp A. Baron; Vasilisa V. Krasitskaya; Anna S. Kichkailo; Anton S. Tarasov; Nikita Volkov
silicon, etc ; biosensors; energy; nanowires; transistors; Show all 5 Subjects
Abstract:
... A top-down nanofabrication approach involving molecular beam epitaxy and electron beam lithography was used to obtain silicon nanowire-based back gate field-effect transistors with Schottky contacts on silicon-on-insulator (SOI) wafers. The resulting device is applied in biomolecular detection based on the changes in the drain-source current (IDS). In this context, we have explained the physical m ...
silicon, etc ; people; temperature; thermal conductivity; Show all 4 Subjects
Abstract:
... Electron–phonon interaction (EPI) has been widely suited in electrical transport properties. Nevertheless, its critical impact on the lattice thermal transport has been revealed in the last few years. Recently, people found that EPI can remarkably reduce the lattice thermal conductivity under a high carrier concentration and low temperature such as in silicon and two-dimensional materials; however ...
... Functionalized nanoparticles (NPs) offer diverse biomedical applications, but their synthesis is complex, costly, and labour-intensive, particularly when providing for additional functionalization requirements which are a key feature of biomedical applications. Pulsed laser ablation in liquids (PLAL) has previously allowed for the synthesis of metal and metal oxide nanoparticles using metal target ...
silicon; silicon carbide, etc ; agricultural wastes; batteries; carbon; energy; green chemistry; phase transition; rice hulls; silica; surface area; Show all 11 Subjects
Abstract:
... Biomass-derived materials offer low carbon approaches to energy storage. High surface area SiC w/wo 13 wt% hard carbon (SiC/HC, SiC/O), derived from carbothermal reduction of silica depleted rice hull ash (SDRHA), can function as Li⁺ battery anodes. Galvanostatic cycling of SiC/HC and SiC/O shows capacity increases eventually to >950 mA h g⁻¹ (Li₁.₂–₁.₄SiC) and >740 mA h g⁻¹ (Li₁.₁SiC), respective ...
silicon, etc ; anodes; electrochemistry; electrolytes; graphene; silica; Show all 6 Subjects
Abstract:
... A facile method to synthesize silicon oxide/graphite (SiOₓ/C) composite anode materials for high-capacity Li-ion batteries (LIBs) is proposed. In order to solve the problems of volume expansion and poor conductivity of silicon-based materials, ball milled disproportionate silicon oxide/graphite (m-d-SiOₓ/C) composite was successfully synthesized by combining high-temperature annealing and high-ene ...
silicon, etc ; alloys; cryolite; environment; temperature; wastes; Show all 6 Subjects
Abstract:
... Silicon cutting waste (SCW) generated during Si wafers producing process can be recycled by AlSi alloying process. However, the presence of O in SCW has a detrimental impact on recycling process. In this study, cryolite was introduced to eliminate the hindrance of O. The influences of smelting temperature and the amount of cryolite additive on the yield of the blocky AlSi alloys and the Si recover ...
silicon, etc ; ambient temperature; batteries; energy; heat; Show all 5 Subjects
Abstract:
... We have developed high power integrated thermoelectric generators (μTEGs). These μTEGs are CMOS compatible, i.e. based on polycristalline SiGe materials. These μTEGs have been processed directly on a silicon interposer. Even if poly-SiGe exhibits low thermoelectric performances at room temperature, the specific design and proposed architecture enable μTEGs to deliver up to 680 μW for a temperature ...
silicon, etc ; alloys; carbon nanotubes; lithium; vapors; Show all 5 Subjects
Abstract:
... A continuous vapor de-alloying strategy for a hundred-gram scale fabrication of silicene is developed by etching CaSi₂ using waste polyvinyl chloride (PVC). The as-obtained few-layered silicene can be readily assembled with carbon nanotubes into flexible electrodes for lithium storage with excellent performance, which stably deliver a high capacity and stability. This strategy can be extended to o ...
silicon, etc ; anodes; boron; graphene; grinding; lithium; Show all 6 Subjects
Abstract:
... The carbon-coated silicon monoxide (SiOₓ@C) has been considered as one of the most promising high-capacity anodes for the next-generation high-energy-density lithium-ion batteries (LIBs). However, the relatively low initial Coulombic efficiency (ICE) and the still existing huge volume expansion during repeated lithiation/delithiation cycling remain the greatest challenges to its practical applicat ...
Shibabrata Basak; Amir H. Tavabi; Krzysztof Dzieciol; Vadim Migunov; Violetta Arszelewska; Hermann Tempel; Hans Kungl; Erik M. Kelder; Marnix Wagemaker; Chandramohan George; Joachim Mayer; Rafal E. Dunin-Borkowski; Rüdiger-A. Eichel
silicon, etc ; anodes; batteries; transmission electron microscopy; Show all 4 Subjects
Abstract:
... Conformal coating of silicon (Si) anode particles is a common strategy for improving their mechanical integrity, to mitigate battery capacity fading due to particle volume expansion, which can result in particle crumbling due to lithiation induced strain and excessive solid–electrolyte interface formation. Here, we use operando transmission electron microscopy in an open cell to show that TiO₂ coa ...
silicon, etc ; irradiation; oxidation; oxygen; periodicity; photoluminescence; Show all 6 Subjects
Abstract:
... We report here a detailed analysis of the ultrashort laser pulse irradiation effects on a single crystalline silicon surface. A systematic study has been performed to understand the surface morphological changes under irradiation with ultrashort laser pulses by changing different input laser parameters such as laser fluence, laser pulse number, and incident laser polarization. Field emission scann ...
silicon, etc ; byproducts; condensates; convection; solidification; temperature; Show all 6 Subjects
Abstract:
... Silicon scraps, as the by-product of solar cells, have received more and more attention for its recycling with the continuing development of the cleaner production. However, hard particles and metal impurities in the silicon scraps are always difficult to remove deeply in industry. In this paper, electron beam melting coupled with directional solidification was used to purify silicon scraps and a ...
silicon, etc ; ammonia; anodes; crosslinking; polyethyleneimine; slurries; temperature; Show all 7 Subjects
Abstract:
... Silicon (Si) is a promising high-capacity anode material for high-energy-density lithium-ion batteries. However, the drastic volumetric changes of Si upon lithiation/delithiation hinder the practical use of Si anodes. Although adhesive polymeric binders, such as poly(acrylic acid) (PAA), mitigate this issue, the cycling performance of the fabricated Si anodes is still far from meeting the criteria ...
silicon, etc ; boron; electrochemistry; electron transfer; nitrogen; sulfur; Show all 6 Subjects
Abstract:
... Recent developments in the use of boron, silicon, nitrogen and sulfur derivatives in single-electron transfer reactions for the generation of alkyl radicals are described. Photoredox catalyzed, electrochemistry promoted or thermally-induced oxidative and reductive processes are discussed highlighting their synthetic scope and discussing their mechanistic pathways. ...
silicon, etc ; absorption; aqueous solutions; quartz; refractive index; Show all 5 Subjects
Abstract:
... We successfully obtained transfer ribonucleic acid (tRNA) thin solid films (TSFs) using an aqueous solution precursor in an optimized deposition process. By varying the concentration of RNA and deposition process parameters, uniform solid layers of solid RNA with a thickness of 30 to 46 nm were fabricated consistently. Linear absorptions of RNA TSFs on quartz substrates were experimentally investi ...