Disordered nanocomposites comprised of polyethylene oxide and exfoliated MoS2 are cycled in the voltage range 0.01−3.0 V. The showed a significant increase reversible capacity cycle stability when compared to or bulk may be used as anode material lithium ion batteries.

Abstract Nanocomposites comprised of poly(ethylene oxide), molybdenum disulfide, and graphene were prepared by the hydrolysis lithiated disulfide in an aqueous solution PEO graphene. Structural analysis XRD shows nanocomposites are disordered with expansion ∼6 Å interlayer spacing. During first discharge, electrochemically dissociates irreversibly into Li 2 S Mo able to continously cycle as +Mo/Li x ↔ + x+2 shown discharged electrodes at different depth discharge (DOD), cyclic voltammetry...

Alkanolamidines, alkanolguanidines and diamines each react with CO2 to form reversible zwitterionic liquids. is chemically bound the alcohol on alkanolamidines as alkylcarbonates, while carbamates. All three classes of liquids could be reverted their non-ionic forms by thermally stripping at temperatures near 50 °C, one derivative was found irreversibly a cyclic carbonate.

Metal–organic frameworks (MOFs) have shown promising behavior for adsorption cooling applications. Using organic ligands with 1, 2, and 3 phenylene rings, we construct moisture-stable Ni-MOF-74 members adjustable pore apertures, which exhibit excellent sorption capabilities toward water fluorocarbon R134a. To our knowledge, this is the first report of isotherms R134a in MOFs. The patterns these materials differ significantly are attributed to variances their hydrophobic/hydrophilic character...

Two organic cathode materials based on the poly(anthraquinonyl sulfide) structure with different substitution positions were synthesized and their electrochemical behavior battery performance investigated. The anthraquinone structure, type of binders for electrode preparation, electrolyte formulations have been found to significant effects batteries containing these materials. polymer less steric hindrance at has higher capacity, longer cycle life better high-rate capability. Polyvinylidene...

Conductivity dopants are used in organic light-emitting devices (OLEDs) to reduce the operating voltage and consequently improve power efficiency. Here, we report synthesis, as well photophysical electroluminescent properties, of an molecular p-type conductivity dopant: 1,3,4,5,7,8-hexafluorotetracyanonaphthoquinodimethane (F6-TNAP). F6-TNAP was obtained a three-step two-pot synthesis from commercially available octafluoronaphthalene. When 1%−5% coevaporated with...

Lithium-sulfur battery is a very promising energy storage system because of its high specific density. However, the dissolution and precipitation soluble polysulfides during cycling initiate series chain reactions that significantly shorten lifespan. In order to understand interfacial occuring on electrode surfaces, we employ convenient electrochemical strategy regulate nucleation surface. The accumulation detrimental Li2S cathode largely alleviated thus enabling stable Li-S batteries. For...

This paper describes a solvent regeneration method unique to CO2-binding organic liquids (CO2BOLs) and other switchable ionic liquids: utilizing changes in polarity shift the free energy of system. The degree CO2 loading CO2BOLs is known control solvent; conversely, can be exploited as means loading. In this process, chemically inert nonpolar "antisolvent" (AS) such hexadecane (C16) added aid de-complexing from CO2-rich CO2BOL. addition assist reduces temperature required for our most recent...

Microbial glycoside hydrolases play a dominant role in the biochemical conversion of cellulosic biomass to high-value biofuels. Anaerobic cellulolytic bacteria are capable producing multicomplex catalytic subunits containing cell-adherent cellulases, hemicellulases, xylanases, and other facilitate degradation highly recalcitrant cellulose related plant cell wall polysaccharides. Clostridium thermocellum is cellulosome-producing bacterium that couples rapid reproduction rates efficient...

A comprehensive evaluation of a recently developed water-lean amine-based solvent, namely<italic>N</italic>-(2-ethoxyethyl)-3-morpholinopropan-1-amine (2-EEMPA), has been performed to analyze its post-combustion CO₂capture performance.

Exposure of enones and enals to 20 mol % tributylphosphine in the presence triarylbismuth(V) dichlorides results regiospecific aryl transfer α-position enone or enal pronucleophile. These represent first examples enolate arylation under conditions nucleophilic catalysis.

N,N-Dibutylundecanolamine is a liquid that chemically binds SO2 to form viscous zwitterionic contains 35% by wt. at standard temperature and pressure. bound the alcohol component as an alkylsulfite, which then stabilized amine. The can be reverted its non-ionic recycled thermally stripping under vacuum temperatures near 70 °C. potential flue gas desulfurizing solvent because it selective bind but not basic enough CO2.

Global carbon dioxide (CO2) emission is expected to increase tremendously with the shift coal-powered plants for energy generation. Capture and sequestration of CO2 are needed mitigate environmental effects. Solvents currently used this energy-intensive aqueous amines. Here we present 10 advanced solvents called alkanolguanidines alkanolamidines that potentially energy-efficient CO2-capture solvents. These were synthesized in 1–3 steps from commercially available materials. One...

Anhydrous DMEA, DEEA and DIPEA are found to absorb carbon dioxide under pressure via chemical binding physical absorption. The CO2-bound derivatives of these materials zwitterionic alkylcarbonate salts which characterized by high-pressure 13C NMR. 20 wt.%, 17 wt.% 16 dioxide, respectively, at 300 psig (20.6 ATM). An increasing uptake capacity trend DMEA > is observed while the CO2 absorption DMEA. captures up 45 mole % (20 wt.%) 500 both amount chemically bound physically absorbed directly...

Capture of CO2 from power generation is required for its conversion or sequestration. Toward this goal, numerous capture processes have been developed, with the most widely deployed technology utilizing aqueous solutions amines. Our group has focused on design several classes water-lean solvents in order to identify molecular-level descriptors control materials properties such as viscosity and regeneration energy. Density functional theory calculations classical molecular dynamic simulations...

The kinetics of the absorption CO2 into two nonaqueous CO2-binding organic liquid (CO2 BOL) solvents were measured at T=35, 45, and 55 °C with a wetted-wall column. Selected loadings run so-called "first-generation" BOL, comprising an independent base alcohol, "second-generation" in which alcohol conjoined. Liquid-film mass-transfer coefficient (k'g ) values for both to be comparable monoethanolamine piperazine aqueous under driving force, spite far higher solution viscosities. An inverse...

The deployment of transformational nonaqueous CO2-capture solvent systems is encumbered by high viscosities even at intermediate uptakes. Using single-molecule CO2 binding organic liquids as a prototypical example, we present key molecular features that control bulk viscosity. Fast CO2-uptake kinetics arise from close proximity the alcohol and amine sites involved in concerted fashion, resulting Zwitterion containing both an alkyl-carbonate protonated amine. population internal hydrogen...

The first catalytic cross-aldolization of metallo-aldehyde enolates with ketone acceptors is enabled via hydrogenation keto-enals cationic rhodium catalysts. These results, in conjunction prior studies involving the hydrogen-mediated reductive coupling enones, dienes, and diynes carbonyl acceptors, support feasibility developing a broad new class C−C bond formations based on electrophilic trapping intermediates.

We report the design, synthesis, thermal, and photophysical properties of two phosphine oxide based electron transport/hole blocking materials, 2,6-bis(4-(diphenylphosphoryl)phenyl)pyridine (BM-A11) 2,4-bis(4-(diphenyl-phosphoryl)phenyl)pyridine (BM-A10), for blue electrophosphorescent organic light emitting devices (OLEDs). The use these materials in OLEDs with iridium(III) bis[(4,6-difluorophenyl)-pyridinato-N,C2′]picolinate (Firpic) as phosphor was demonstrated. Using dual host device...

Natural gas purifications using chemically selective hydrogen sulfide (H2S) sorbents could be more efficient if chemical selectivity for H2S maintained without thermal regeneration of the sorbent. We used tertiary alkanolamines to reversibly capture in absence water produce hydrosulfide-based ionic liquids high yield. These alkanolammonium hydrosulfide release by exposure inert or mild heating. can rapidly and nearly quantitatively released at ambient temperature from addition nonpolar...

Sealing of wellbores in geothermal and tight oil/gas reservoirs by filling the annulus with cement is a well-established practice. Failure as result physical and/or chemical stress common problem serious environmental financial consequences. Numerous alternative blends have been proposed for oil gas industry. Most these possess poor mechanical properties, or are not designed to work high temperature environments. This reports on novel polymer-cement composite remarkable self-healing ability...

Anthropogenic CO2 emissions from point sources (e.g., coal fired-power plants) account for the majority of greenhouse gases in atmosphere. Water-lean solvent systems such as -binding organic liquids (CO2 BOLs) are being developed to reduce energy requirement capture. Many water-lean solvents BOLs currently limited by high viscosities concentrated electrolyte solvents, thus many these have yet move toward commercialization. Conventional standard trial-and-error approaches viscosity reduction,...