Tag: M.W=200-250

Hu, Pu published the artcileCapturing the differences between lithiation and sodiation of nanostructured TiS2 electrodes, Application In Synthesis of 143-24-8, the main research area is titanium disulfide nanoparticle electrode lithiation sodiation.

In this study TiS2 is chosen as a model electrode material to investigate the relationship between the electrochem. and mech. performance of layered cathodes for Na-ion batteries. Employing NaFP6 in EC/DMC as the electrolyte allowed for the most promising electrochem. properties recorded in the literature, namely a reversible capacity of 203 mAh g-1 at 0.2 C and 88 mAh g-1 at 10 C with a capacity retention of 92% over 50 cycles. Despite this promising performance the capacity still decayed during long term cycling. In-situ x-ray diffraction and high-resolution transmission electron microscopy imaging revealed that TiS2 underwent a large expansion of 17.7% along the c direction and irreversible phase transformations took place during the sodiation/de-sodiation process, which lead to severe mech. strains and intragranular cracks. In comparison, the mech. stability of TiS2 in Li-ion cells was significantly higher. The exptl. results are interpreted within a continuum mechanics model which revealed that the maximum effective von Mises stress that is present at the interface between the ion-intercalated TiS2 and pristine TiS2 is about four times higher during sodiation than lithiation indicating that the electrode is more susceptible to failure/fracture during sodiation.

Nano Energy published new progress about Diffusion. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Application In Synthesis of 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Delehedde, Caroline published the artcileNovel Sterically Crowded and Conformationally Constrained α-Aminophosphonates with a Near-Neutral pKa as Highly Accurate 31P NMR pH Probes. Application to Subtle pH Gradients Determination in Dictyostelium discoideum Cells, Computed Properties of 23783-42-8, the main research area is Dictyostelium discoideum cell aminophosphonate neutral pKa NMR pH probe; 31P NMR; Dictyostelium discoideum cells; X-ray crystallography; pH probes; phophorus pyramidalization angle; trans-sarcolemmal pH gradients; α-aminophosphonates.

In order to discover new 31P NMR markers for probing subtle pH changes (<0.2 pH unit) in biol. environments, fifteen new conformationally constrained or sterically hindered α-aminophosphonates derived from diethyl(2-methylpyrrolidin-2-yl)phosphonate were synthesized and tested for their pH reporting and cytotoxic properties in vitro. All compounds showed near-neutral pKas (ranging 6.28-6.97), chem. shifts not overlapping those of phosphorus metabolites, and spectroscopic sensitivities (i.e., chem. shifts variation Δδab between the acidic and basic forms) ranging from 9.2-10.7 ppm, being fourfold larger than conventional endogenous markers such as inorganic phosphate. X-ray crystallog. studies combined with predictive empirical relationships and ab initio calculations addressed the inductive and stereochem. effects of substituents linked to the protonated amine function. Satisfactory correlations were established between pKas and both the 2D structure and pyramidalization at phosphorus, showing that steric crowding around the phosphorus is crucial for modulating Δδab. Finally, the hit 31P NMR pH probe 1b bearing an unsubstituted 1,3,2-dioxaphosphorinane ring, which is moderately lipophilic, nontoxic on A549 and NHLF cells, and showing pKa = 6.45 with Δδab = 10.64 ppm, allowed the first clear-cut evidence of trans-sarcolemmal pH gradients in normoxic Dictyostelium discoideum cells with an accuracy of <0.05 pH units. Molecules published new progress about Biomarkers. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Computed Properties of 23783-42-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Liu, Xiao published the artcileBiphasic Electrolyte Inhibiting the Shuttle Effect of Redox Molecules in Lithium-Metal Batteries, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium metal battery shuttle effect biphasic electrolyte; biphasic electrolytes; lithium redox flow batteries; lithium-oxygen batteries; redox mediators; shuttle effects.

Redox mols. (RMs) as electron carriers have been widely used in electrochem. energy-storage devices (ESDs), such as lithium redox flow batteries and lithium-O2 batteries. Unfortunately, migration of RMs to the lithium (Li) anode leads to side reactions, resulting in reduced coulombic efficiency and early cell death. Our proof-of-concept study utilizes a biphasic organic electrolyte to resolve this issue, in which nonafluoro-1,1,2,2-tetrahydrohexyl-trimethoxysilane (NFTOS) and ether (or sulfone) with lithium bis(trifluoromethane)sulfonimide (LiTFSI) can be separated to form the immiscible anolyte and catholyte. RMs are extracted to the catholyte due to the enormous solubility coefficients in the biphasic electrolytes with high and low polarity, resulting in inhibition of the shuttle effect. When coupled with a lithium anode, the Li-Li sym., Li redox flow and Li-O2 batteries can achieve considerably prolonged cycle life with biphasic electrolytes. This concept provides a promising strategy to suppress the shuttle effect of RMs in ESDs.

Angewandte Chemie, International Edition published new progress about Cell cycle. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Application of 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Erdol, Zeynep published the artcileAssessment on the Stable and High-Capacity Na-Se Batteries with Carbonate Electrolytes, Product Details of C10H22O5, the main research area is sodium selenium battery carbonate electrolyte.

Factors affecting proper functioning of Na-Se system are investigated focusing on the polyselenide formation in ether- and carbonate-based electrolytes. To do so, Se cathode is prepared by ball milling with com. carbon and selenium powders. It is revealed that the soluble polyselenide species form in ether while no signature in carbonates proven by the in-situ cyclic voltammetry and ex-situ UV-visible spectroscopy measurements as well as monitoring self-discharge behaviors. Different Se discharge mechanism is also highlighted by staircase potentio electrochem. impedance spectroscopy (SPEIS) that is an impedance measurement applied to each potential step. Volume expansion is targeted using different types of binders in which carboxyl methylcellulose-styrene butadiene rubber (CMC-SBR) delivers the highest reversible capacity and the best rate performance resulting from its high adhesion strength. To further improve the performances, fluoroethylene carbonate (FEC) is used as a film forming additive that preserves Na metal integrity proven by the Na-Na sym. cells and voltage relaxation upon cycling. As a whole, binders and electrolyte compositions are found to be the two crucial factors to obtain stable and high-capacity Na-Se cells. This study underlines that much effort needs to be put on the strategies to overcome volume expansion than that of Se confinement into porous cathode.

ChemElectroChem published new progress about Composites. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Product Details of C10H22O5.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Liang, Dong published the artcileInhibiting the shuttle effect using artificial membranes with high lithium-ion content for enhancing the stability of the lithium anode, Computed Properties of 143-24-8, the main research area is graphene oxide polystyrene sulfate lithium oxygen battery stability.

The low cycle stability of the lithium anode has become one of the bottlenecks restricting the development of lithium-metal batteries with high theor. energy d. Serious side reactions between lithium and electrolyte components are one of the key reasons for the poor cycle stability of the lithium anode. Herein, lithiated graphene oxide (GO-Li) and lithium poly(styrene sulfate) (PSS-Li) are used to construct composite membranes for the protection of the Li-anode, which shows long-term operation over 1000 h in Li-Li sym. cells in the presence of redox chems. that accelerate the cathodic reaction. The high content of Li+ of PSS-Li can not only inhibit the dissolution and diffusion of redox mols. in the membrane, but also improve the Li+ transport rate through the membrane. In our study, we take a lithium-oxygen (Li-O2) battery as the model device and 2,2,6,6-tetramethyl-1-piperidinyloxy as the model redox chem. to accelerate the cathodic reaction. Compared with conventional membranes, artificial membranes can effectively inhibit the side reaction between the redox mols. and the lithium anode. Consequently, the energy efficiency and cycle stability (over three times) of Li-O2 batteries are greatly improved. This provides an important theor. basis and tech. support for the design and preparation of membranes for high performance energy-conversion batteries.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about Composites. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Computed Properties of 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Hegemann, P. published the artcileStability of tetraglyme for reversible magnesium deposition from a magnesium aluminum chloride complex, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is stability tetraglyme reversible magnesium deposition aluminum chloride complex.

The electrochem. behavior of Mg deposition and stripping at Au-electrode in magnesium aluminum chloride complex (MACC) tetraglyme electrolyte was studied using differential electrochem. mass spectrometry (DEMS) and scanning tunneling microscopy (STM). During Mg deposition no dendrites are formed. MACC electrolyte supports reversible Mg deposition with high coulombic efficiency. Despite of the high coulombic efficiencies that was observed in MACC, appreciable ethylene formation due to the decomposition of tetraglyme was detected solely during Mg stripping. The mechanism of organic solvent decomposition will be discussed. This ethylene formation is quant. responsible for the missing charge balance of Mg-deposition and dissolution Possible origins will be discussed.

Journal of the Electrochemical Society published new progress about Electrodes. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Safety of 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Lin, En published the artcileA Class of Rigid-Flexible Coupling Crystalline Crosslinked Polymers as Vapomechanical Actuators, Related Products of ethers-buliding-blocks, the main research area is rigid flexible coupling crystalline crosslinked polyazomethine vapomech actuator; Covalent Organic Frameworks; Crosslinked Polymer; Crystalline; Smart Materials; Vapor Responsive.

Fabricating mech. responsive actuators that can efficiently convert external stimuli into mech. work is of great significance for real-world applications. Herein, we rationally design a class of rigid-flexible coupling crystalline crosslinked polymers (CCPs) to fabricate vapomechanically responsive actuators. Interfacial condensation reactions of flexible macromers with rigid monomers afford a series of freestanding CCP membranes. Notably, it is the first example where crosslinked polymers show high crystallinity and porosity. Moreover, the CCP membranes exhibit good mech. properties and interesting vapor-triggered actuation performance, which is reversible and repeatable. We find that the unusual polymer structures, high vapor sorption, and anisotropic membranes contribute to the directional deformation performance of the CCP actuators. The synthesis approach in this work provides new insights into the design and fabrication of smart materials for advanced applications.

Angewandte Chemie, International Edition published new progress about Actuators. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Related Products of ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Tan, Tian published the artcilePrediction of infinite-dilution activity coefficients with neural collaborative filtering, HPLC of Formula: 143-24-8, the main research area is prediction infinite dilution activity coefficient neural collaborative filtering.

Accurate prediction of infinite dilution activity coefficient (γ∞) for phase equilibrium and process design is crucial. In this work, an exptl. γ∞ dataset containing 295 solutes and 407 solvents (21,048 points) is obtained through data integrating, cleaning, and filtering. The dataset is arranged as a sparse matrix with solutes and solvents as columns and rows, resp. Neural collaborative filtering (NCF), a modern matrix completion technique based on deep learning, is proposed to fully fill in the γ∞ matrix. Ten-fold cross-validation is performed on the collected dataset to test the effectiveness of the proposed NCF, proving that NCF outperforms the state-of-the-art phys. model and previous machine learning model. The completed γ∞ matrix makes solvent screening and extension of UNIFAC parameters possible. Taking two typical hard-to-sep. systems (benzene/cyclohexane and Me cyclopentane/n-hexane mixtures) as examples, the NCF-developed database provides high-throughput screening for separation systems in terms of solvent selectivity and capacity.

AIChE Journal published new progress about Algorithm. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, HPLC of Formula: 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Xue, Hairong published the artcileHollow mesoporous Fe2O3 nanospindles/CNTs composite: an efficient catalyst for high-performance Li-O2 batteries, COA of Formula: C10H22O5, the main research area is iron oxide carbon nanotube composite hydrolysis; Li-O2 batteries; carbon support; cathodic catalyst; hollow mesoporous structure; transition metal oxides.

The design of mesoporous or hollow transition metal oxide/carbon hybrid catalysts is very important for rechargeable Li-O2 batteries. Here, spindle-like Fe2O3 with hollow mesoporous structure on CNTs backbones (Fe2O3-HMNS@CNT) are prepared by a facile hydrolysis process combined with low temperature calcination. Within this hybrid structure, the hollow interior and mesoporous shell of the Fe2O3 nanospindles provide high sp. surface area and abundant catalytical active sites, which is also beneficial to facilitating the electrolyte infiltration and oxygen diffusion. Furthermore, the crisscrossed CNTs form a three-dimensional (3D) conductive network to accelerate and stabilize the electron transport, which leads to the decreasing internal resistance of electrode. As a cathodic catalyst for Li-O2 batteries, the Fe2O3-HMNS@CNT composite exhibits high specific capacity and excellent cycling stability (more than 100 cycles).

Frontiers in Chemistry (Lausanne, Switzerland) published new progress about Annealing. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, COA of Formula: C10H22O5.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Wang, Junbo published the artcileIn situ growth of Co3O4 on nitrogen-doped hollow carbon nanospheres as air electrode for lithium-air batteries, Name: 2,5,8,11,14-Pentaoxapentadecane, the main research area is inSitu growth cobalt oxide nitrogen doped hollow carbon nanosphere; air electrode lithium battery.

Design and synthesis of efficient bifunctional electrocatalysts for both O reduction reaction and O evolution reactions are of great significant for metal-air batteries. Here, bifunctional catalysts consisting of Co3O4 nanocrystals and N-doped hollow C nanospheres are synthesized through in situ growth of Co3O4 nanocrystals on the surface of N-doped hollow C nanospheres. The observed Co-N bond formation is an indication of the nucleation of Co3O4 nanocrystals starting from N-sites in N-doped hollow C nanospheres. The resulted hybrids exhibit improved activity towards O reduction reaction compared to pristine N-doped hollow C nanospheres in terms of the 42 mV pos. shift of half-wave potential and comparable activity towards O evolution reactions with com. RuO2 and IrO2 catalysts. The thus-assembled Li-O battery delivers an initial discharge capacity of 3325 mAh/g at 100 mA/g using mixed gas of O and Ar (20% of O in volume). The battery fails after 27 discharge/charge cycles due to the accumulation of discharge products on electrode.

Journal of Alloys and Compounds published new progress about Annealing. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Name: 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem