Tag: M.W=200-250

Chirkov, Yu. G. published the artcileRegular biporous model of active layer of the Lithium-Oxygen battery positive electrode, COA of Formula: C10H22O5, the main research area is lithium oxygen battery pos electrode regular biporous model.

To perform the oxygen reduction reaction effectively, the active layer of the lithium-oxygen battery pos. electrode must have developed surface possessing a complicated pore structure. During discharge (the oxygen reaction cathodic component), the electrode accumulates lithium peroxide, a final product of electrochem. and chem. reactions (resulting in the conjunction of lithium ions, oxygen mols. and electrons); the latter undergoes oxidation (the oxygen reaction anodic component) during the lithium-oxygen battery charging. The lithium peroxide is a water-insoluble compound that has no electronic conduction; when depositing on the electrode surface it seals openings of narrow pores and prevents oxygen penetration therein. To obtain more lithium peroxide via oxygen reduction in the presence of lithium ions, a cluster of large pores, practically unsealed with the lithium peroxide, is produced in the active layer; the pores supply oxygen deep into the active layer. The Li2O2 accumulation occurs in a cluster of lesser pores with developed surface. In the creating of the lithium-oxygen battery pos. electrode active layer optimal structure, the difficulty is that some key quantities are unknown in advance. They are the large-scale and lesser pore average size and their volume fractions in the active layer. To solve the problem, the regular biporous model of the pore structure can be used. In the model, the pore radii are strictly fixed. This opens a relatively easy way for the interconnecting, by calculations, of parameters and the lithium-oxygen battery dimensioning specifications during its discharge. This work aimed at the proposing of the pos. electrode active layer regular biporous model and developing of a procedure for the calculating of the lithium-oxygen battery dimensioning specifications during the discharge. It is shown, in a specific context, how the varying of the pos. electrode active layer structure and the oxygen consumption constant k can control the Li2O2 accumulation.

Russian Journal of Electrochemistry published new progress about Anodes. 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

Qian, Xiaomin published the artcileDistinguishing Commercial Beers Using a Solution-Based Sensor Array Derived from Nanoscale Polydiacetylene Vesicles, Safety of 2,5,8,11-Tetraoxatridecan-13-ol, the main research area is polydiacetylene vesicle solution sensor array beer.

The fast and effective discrimination of different liquid mixtures such as beers is a long-standing challenge in the food and beverage industry. We report the fabrication of a solution-based sensor array derived from nanoscale polydiacetylene (PDA) vesicles to distinguish different ethanol containing aqueous solutions supplemented with different model flavor compounds relevant in beers. The sensitivity of the sensors was significantly affected by the head group modification of the diacetylenes and the composition of the sensors. Finally, a selected set of sensors was utilized as a sensor array to distinguish different com. beers in combination with statistical data anal. This approach represents an effort toward the employment of low-cost sensors with an easy read-out for the fast discrimination of different beverages.

ACS Applied Nano Materials published new progress about Beer. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Safety of 2,5,8,11-Tetraoxatridecan-13-ol.

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

Anon, Elena published the artcileNot always what closes best opens better: mesoporous nanoparticles capped with organic gates, Name: 2,5,8,11-Tetraoxatridecan-13-ol, the main research area is mesoporous nanoparticle gated nanodevice esterase controlled release; 10 Engineering and Structural materials; 102 Porous / Nanoporous / Nanostructured materials; Mesoporous nanoparticles; esterase controlled release; gated nanodevices.

Four types of calcined MCM-41 silica nanoparticles, loaded with dyes and capped with different gating ensembles are prepared and characterized. N1 and N2 nanoparticles are loaded with rhodamine 6G and capped with bulky poly(ethylene glycol) derivatives bearing ester groups (1 and 2). N3-N4 nanoparticles are loaded with sulforhodamine B and capped with self-immolative derivatives bearing ester moieties. In the absence of esterase enzyme negligible cargo release from N1, N3 and N4 nanoparticles is observed whereas a remarkable release for N2 is obtained most likely due to the formation of an irregular coating on the outer surface of the nanoparticles. In contrast, a marked delivery is found in N1, N3, and N4 in the presence of esterase enzyme. The delivery rate is related to the hydrophilic/hydrophobic character of the coating shell. The use of hydrophilic poly(ethylene glycol) derivatives as gating ensembles on N1 and N2 enables an easy access of esterase to the ester moieties with subsequent fast cargo release. On the other hand, the presence of a hydrophobic monolayer on N3 and N4 partially hinders esterase enzyme access to the ester groups and the rate of cargo release was decreased.

Science and Technology of Advanced Materials published new progress about Dyes. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Name: 2,5,8,11-Tetraoxatridecan-13-ol.

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

Kang, Inhan published the artcileDirect growth of CuO particles on carbon papers for high-performance rechargeable Li-O2 batteries, Related Products of ethers-buliding-blocks, the main research area is lithium oxygen battery carbon paper copper oxide particle growth.

Lithium-oxygen (Li-O2) batteries are considered as a promising high-energy storage system. However, they suffer from overpotential and low energy efficiency. This study showed that CuO growth on carbon using facile synthesis (simple dipping and heating process) reduces overpotential, thus increasing the energy efficiency. We confirmed the structure of CuO on carbon using X-ray diffraction pattern, XPS, field-emission SEM, and field-emission transmission electron microscopy. The cathode of CuO on carbon shows an average overpotential reduction of ~6% charge/discharge during 10 cycles in nonaqueous Li-O2 batteries. The possible reason for the reduced charge overpotential of the cathode of CuO on carbon is attributed to the formed Li2O2 of smaller particle size during discharging compared to pristine carbon.

Journal of Nanoscience and Nanotechnology published new progress about Air. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Related Products of ethers-buliding-blocks.

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

Grundy, Lorena S. published the artcileImpact of frictional interactions on conductivity, diffusion, and transference number in ether- and perfluoroether-based electrolytes, Related Products of ethers-buliding-blocks, the main research area is lithium tetraglyme perfluoroether mol interaction electrolyte ionic conductivity thermodn.

There is growing interest in fluorinated electrolytes due to their high-voltage stability. We use full electrochem. characterization based on concentrated solution theory to investigate the underpinnings of conductivity and transference number in tetraglyme/LiTFSI mixtures (H4) and a fluorinated analog, C8-DMC, mixed with LiFSI (F4). Conductivity is significantly lower in F4 than in H4, and F4 exhibits neg. cation transference numbers, while that of H4 is pos. at most salt concentrations By relating Stefan-Maxwell diffusion coefficients, which quantify ion-solvent and cation-anion frictional interactions, to conductivity and transference number, we determine that at high salt concentrations, the origin of differences in transference number is differences in anion-solvent interactions. We also define new Nernst-Einstein-like equations relating conductivity to Stefan-Maxwell diffusion coefficients In H4 at moderate to high salt concentrations, we find that all mol. interactions must be included. However, we demonstrate another regime, in which conductivity is controlled by cation-anion interactions. The applicability of this assumption is quantified by a pre-factor, β±, which is similar to the “”ionicity”” pre-factor that is often included in the Nernst-Einstein equation. In F4, β± is unity at all salt concentrations, indicating that ionic conductivity is entirely controlled by the Stefan-Maxwell diffusion coefficient quantifying cation-anion frictional interactions.

Journal of the Electrochemical Society 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, Related Products of ethers-buliding-blocks.

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

Xing, Wei published the artcileRevealing the impacting factors of cathodic carbon catalysts for Li-CO2 batteries in the pore-structure point of view, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is impact cathodic carbon catalyst lithium dioxide battery pore structure.

Li-CO2 battery is a very promising power source with high energy d. Its performance is strongly restricted by the cathode catalysts, in which C-based catalysts were mostly studied. However, the impacting factors on the performance of C catalysts is not yet elucidated. Here, the authors employed a variety of C materials with different pore-structure features as the cathode catalysts of Li-CO2 batteries to reveal which are the main influencing factor on the catalytic performance of C catalysts. Suitable pore shape (most important), large pore size and high surface area are crucial factors to the catalytic performance of C catalysts. This finding is of great significance to the further development of Li-CO2 batteries.

Electrochimica Acta published new progress about Aerogels. 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

Dutta, Prasit Kumar published the artcileMechanism of Na-Ion Storage in BiOCl Anode and the Sodium-Ion Battery Formation, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is bismuth oxychloride anode Prussian blue cathode sodium ion battery.

We systematically unravel the mechanism by which sodium ion reacts electrochem. with ionically layered BiOCl nanosheets. Solution-processed BiOCl nanosheets were cycled using slow scan cyclic voltammetry (50 μV s-1) to reach the desired reaction voltages. Characterizations using in situ impedance spectroscopy and ex situ X-ray diffraction, Raman spectroscopy, and transmission electron microscopy are used to map the mechanism of Na-ion insertion and deinsertion in BiOCl nanosheets. It was found that BiOCl initially undergoes a conversion reaction to form metallic Bi. The metallic Bi further alloys with sodium ion to form Na3Bi and NaBi, a compound whose formation has not been reported before. We also detect the formation of BiO, Na3BiO4, and NaBiO3. Finally, BiOCl is used as anode against a Prussian blue cathode to prepare a full cell that is capable of providing an average discharge potential of ∼2.2 V at the 100th cycle. The overall study reveals new insights and key differences in the mechanism of sodium-based electrochem. energy storage systems.

Journal of Physical Chemistry C published new progress about Alloying. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane.

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

Liu, Weiwei published the artcileLight-Assisted Li-O2 Batteries with Lowered Bias Voltages by Redox Mediators, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is redox mediator lithium oxygen battery bias voltage; bias voltage; lithium-oxygen batteries; photocatalysts; photogenerated holes and electrons; redox mediators.

The enormous overpotential caused by sluggish kinetics of the oxygen reduction reaction and the oxygen evolution reaction prevents the practical application of Li-O2 batteries. The recently proposed light-assisted strategy is an effective way to improve round-trip efficiency; however, the high-potential photogenerated holes during the charge would degrade the electrolyte with side reactions and poor cycling performance. Herein, a synergistic interaction between a polyterthiophene photocatalyst and a redox mediator is employed in Li-O2 batteries. During the discharge, the voltage can be compensated by the photovoltage generated on the photoelectrode. Upon the charge with illumination, the photogenerated holes can be consumed by the oxidization of iodide ions, and thus the external circuit voltage is compensated by photogenerated electrons. Accordingly, a smaller bias voltage is needed for the semiconductor to decompose Li2O2, and the potential of photogenerated holes decreases. Finally, the round-trip efficiency of the battery reaches 97% with a discharge voltage of 3.10 V and a charge voltage of 3.19 V. The batteries show stable operation up to 150 cycles without increased polarization. This work provides new routes for light-assisted Li-O2 batteries with reduced overpotential and boosted efficiency.

Small published new progress about Band gap. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane.

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

Bennett, Ellie published the artcileSize Dependent Optical Properties and Structure of ZnS Nanocrystals Prepared from a Library of Thioureas, SDS of cas: 143-24-8, the main research area is optical absorption zinc sulfide nanocrystal thiourea precursor size.

ZnS nanocrystals (λmax(1Se-1S3/2h) = 260-320 nm, d = 1.7-10.0 nm) are synthesized from Zn(O2CR)2 (O2CR = tetradecanoate, oleate and 2-hexyldecanoate), N,N′-disubstituted and N,N′,N′-trisubstituted thioureas, and P,P,N-trisubstituted phosphanecarbothioamides. The influence of precursor substitution, ligand sterics, and reaction temperature on the final nanocrystal size was evaluated. Using saturated hydrocarbon solvents and saturated aliphatic carboxylate ligands, polymeric byproducts could be avoided and pure ZnS nanocrystals isolated. Elevated temperatures, slower precursor conversion reactivity, and branched zinc 2-hexyldecanoate yield the largest ZnS nanocrystals. Carefully purified zinc carboxylate, rapidly converting precursors, and cooling the synthesis mixture following complete precursor conversion provide quasispherical nanocrystals with the narrowest shape dispersity. Nanocrystal sizes were measured using pair distribution function (PDF) anal. of X-ray scattering and scanning transmission electron microscopy (STEM) and plotted vs. the energy of their first excitonic optical absorption. The resulting empirical relationship provides a useful method to characterize the nanocrystal size from 1.7 to 4.0 nm using optical absorption spectroscopy.

Chemistry of Materials published new progress about Band gap. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, SDS of cas: 143-24-8.

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

Song, Mengyuan published the artcileTetramethylpyrazine: an electrolyte additive for high capacity and energy efficiency lithium-oxygen batteries, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is tetramethylpyrazine electrolyte lithium oxygen battery energy efficiency.

Lithium-oxygen batteries have attracted great attention in recent years owing to their extremely high theor. energy d., however, factors such as low actual capacity and poor rate performance hinder the practical application of lithium-oxygen batteries. In this work, a novel electrolyte additive, tetramethylpyrazine (TMP), is introduced into an electrolyte system to enhance the electrochem. performance of the lithium-oxygen batteries. TMP does not undergo its own redox reaction within the charge-discharge voltage range, which will not affect the electrochem. stability of the electrolyte. The results show that the addition of TMP can increase the reduction current of oxygen, which will promote the ORR process, and with an optimal TMP content (50 mM), the cell shows a high discharge capacity of 5712.3 mA h g-1 at 0.1 mA cm-2. And its rate capability is almost doubled compared with the system without TMP additive at a large c.d. of 1 mA cm-2. Further anal. by SEM and XRD reveals that the addition of TMP can reduce the formation of byproducts and promote the solution growth of large-size Li2O2 particles to achieve a large discharge capacity. This approach could provide a new idea for improving the electrochem. performance of lithium-oxygen batteries.

RSC Advances published new progress about Basicity. 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