Month: November 2022

Zhang, Lei published the artcilePhotoregulative phase change biomaterials showing thermodynamic and mchanical stabilities, Quality Control of 23783-42-8, the main research area is photoregulative phase change biomaterial thermodn mchanical stability.

Azobenzenes are great photochromic mols. for switching the phys. properties of various materials via trans-cis isomerization. However, the UV light resulted cis-azobenzene is metastable and thermodynamically gets back to trans-azobenzene after ceasing UV irradiation, which causes an unwanted property change of azobenzene-containing materials. Addnl., thermal and mech. conditions would accelerate this process dramatically. In this present work, a new type of azobenzene-containing surfactant is designed for the fabrication of photoresponsive phase change biomaterials. With a “”locked”” cis-azobenzene conformation, the resulting biomaterials could maintain their disordered state after ceasing UV light, which exhibit great resistance to thermal and piezo conditions. Interestingly, the “”locked”” cis-azobenzene could be unlocked by Vis light in high efficiency, which opens a new way for the design of phase change materials only responding to light. By showing stable cis-azobenzene maintained phys. state, the newly fabricated biomaterials provide new potential for the construction of advanced materials, like self-healing materials, with less use of long time UV irradiation for maintaining their disordered states.

Nanoscale published new progress about Biological materials. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Quality Control of 23783-42-8.

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

Prieto, Mariana Gonzalez published the artcileModeling Phase Equilibria of Ethers and Alcohols with GCA-EOS for Assessing the Coblending of Advanced Biofuels, Name: 2,5,8,11,14-Pentaoxapentadecane, the main research area is model phase equilibrium ether alc GCA EOS coblending biofuel.

In this work, we extend the Group Contribution with Association Equation of State (GCA-EOS) to model the phase behavior of mixtures comprising ethers and alcs. The model parametrization was done using few binary vapor-liquid equilibrium data sets of linear monoethers. We also model the behavior of branched ethers, traditionally used as fuel additives, as well as that of polyethers, which are nowadays being proposed as potential biofuels. Therefore, we investigate, not only the phase equilibrium, but also excess enthalpies of these three types of ethers in mixtures with alcs. Finally, we show that the GCA-EOS is able to predict the phase behavior of polyethers, as well as that of branched ethers, using a group contribution approach. This work is part of a broader project for the development of a robust and predictive thermodn. model for process and product design in the context of biomass valorization. In addition, the parametrization reported here aims to provide a reliable framework specific for the description of thermodn. properties of biofuel blends.

Journal of Chemical & Engineering Data published new progress about Binary phase diagram. 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

Krueger, Bastian published the artcileRedox Mediators for Faster Lithium Peroxide Oxidation in a Lithium-Oxygen Cell: A Scanning Electrochemical Microscopy Study, Category: ethers-buliding-blocks, the main research area is lithium peroxide oxidation kinetics redox mediator lithium oxygen battery.

The reoxidation of Li2O2 as a discharge product of a Li-O2 cell occurs with high overpotential at the three-phase boundary between the electron conductor of the pos. gas-diffusion electrode, the organic electrolyte, and solid Li2O2. Indirect oxidation of Li2O2 by means of redox mediators is a way to overcome the high overpotential of this reaction, decrease the formation of reactive oxygen species, and convert the entire amount of Li2O2 formed during the discharge step. The rate constants of the redox reaction between oxidized mediators and solid Li2O2 were determined for five organic redox mediators in two glyme electrolytes and two electrolytes based on ionic liquids Specifically, (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO), 1,2,4,5-tetramethoxybenzene (TMB), 2,5-di-tert-butyl-1,4-dimethoxybenzene (DBDMB), 2,2′-bis(1,3-dithiolylidene) (TTF), and N-methylphenothiazine (MPT) were used in electrolytes based on 1-methoxy-2-(2-methoxyethoxy)ethane (diglyme) and 1-methoxy-2-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]ethane (tetraglyme) as well as in the ionic liquids 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIm]TFSI) and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([Py1,4]TFSI). The suitability of the method was carefully evaluated. The highest rate constant was found for DBDMB in diglyme. TTF showed the lowest rate constant in all tested electrolytes. The rate constants of all mediators in ionic liquids are at least 1 order of magnitude lower than in the ether-based electrolytes although the viscosity of [EMIm]TFSI is comparable to that of tetraglyme. This must be considered when devising Li-O2 cells with such nonvolatile electrolytes.

ACS Applied Energy Materials published new progress about Battery electrolytes. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Category: ethers-buliding-blocks.

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

Sudoh, Taku published the artcileLi+ transference number and dynamic ion correlations in glyme-Li salt solvate ionic liquids diluted with molecular solvents, Related Products of ethers-buliding-blocks, the main research area is lithium transference number dynamic ion correlations glyme salt solvate.

Highly concentrated electrolytes (HCEs) have attracted significant interest as promising liquid electrolytes for next-generation Li secondary batteries, owing to various beneficial properties both in the bulk and at the electrode/electrolyte interface. One particular class of HCEs consists of binary mixtures of lithium bis(trifluoromethanesulfonyl)amide (LiTFSA) and oligoethers that behave like ionic liquids [Li(G4)][TFSA], which comprises an equimolar mixture of LiTFSA and tetraglyme (G4), is an example. In our previous works, the addition of low-polarity mol. solvents to [Li(G4)][TFSA] was found to effectively enhance the conductivity while retaining the unique Li-ion solvation structure. However, it remains unclear how the diluents affect another key electrolyte parameter-the Li+ transference number-despite its critical importance for achieving the fast charging/discharging of Li secondary batteries. Thus, in this study, the effects of diluents on the extremely low Li+ transference number under anion-blocking conditions in [Li(G4)][TFSA] were elucidated, with a special focus on the polarity of the addnl. solvents. The concentration dependence of the dynamic ion correlations was further studied in the framework of the concentrated electrolyte theory. The results revealed that a non-coordinating diluent is not involved in the modification of the ion transport mechanism, and therefore the low Li+ transference number is inherited by the diluted electrolytes. In contrast, a coordinating diluent effectively reduces the anti-correlated ion motions of [Li(G4)][TFSA], thereby improving the Li+ transference number This is the first time that the significant effects of the coordination properties of the diluting solvents on the dynamic ion correlations and Li+ transference numbers have been reported for diluted solvate ionic liquids

Physical Chemistry Chemical Physics published new progress about Battery electrolytes. 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

Mesallam, Medhat published the artcileSynthesis and characterization of polyvinylidene fluoride/magnesium bromide polymer electrolyte for magnesium battery application, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is polyvinylidene fluoride magnesium bromide battery electrolyte FTIR spectrum.

The development of a magnesium ion conducting electrolyte is essential for designing rechargeable magnesium batteries. Herein, we report magnesium-ion conducting polymer electrolytes (PE) based on polyvinylidene fluoride (PVDF) and tetraethylene glycol di-Me ether (TEGDME) with magnesium bromide salt processed by solution casting method. Fouriertransform IR spectroscopy (FTIR) shows a composite between the polymer and the MgBr2 salt forms. X-ray diffraction (XRD) data reveals that the broad reflections of the PVDF polymer are reduced with the addition of TEGDME and MgBr2, with SEM (SEM) illustrating changes in the morphol. The ionic conductivity and the relaxation time are found to be 1.2 x 10-6 S cm-1 and 5.7 x 10-5 s-1 at room temperature, resp. This polymer electrolyte exhibits initial cycles with low overpotential, reversible Mg plating/ stripping, and an excellent Mg-ion transfer number (t2+Mg) = 0.55. The assembled Mg/graphite and Mg/graphene nanoplatlets (GNP) prototype cells with this polymer electrolyte (PE) demonstrate the interaction of the magnesium ions with the electrodes.

Physica Scripta published new progress about Battery electrolytes. 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

Guo, Feng published the artcileExperimental study on flammability limits of electrolyte solvents in lithium-ion batteries using a wick combustion method, SDS of cas: 143-24-8, the main research area is lithium ion battery flammability electrolyte solvent wick combustion organophosphorus.

To quantify the flammability limits of organic electrolyte solvents used in lithium-ion batteries, a unique wick combustion system was developed in conjunction with limiting oxygen concentration (LOC) of candle-like flame, named wick-LOC method. By controlling the oxygen-nitrogen ratio of external flow of the wick diffusion flame, the flammability limits (LOC) of electrolyte solvents were determined exptl. To provide reproducible results under specified conditions, the effects of axial flow velocity, exposed wick length and elapsed time after ignition on the wick-LOC were studied, and the proper exptl. conditions were selected for further applications. To validate the reliability of wick-LOC in flammability evaluation, correlation anal. to other flammability properties (flash point, auto-ignition temperature, the heat of combustion and other types of LOC) were conducted. The wick-LOC method was then applied to quantify the flammability of mixed solvents. The linear changes of wick-LOC with mixing ratios were found in the mixture of linear and cyclic carbonates, while the non-linear trends were found in carbonate-ether mixed solvents. To evaluate the flame-retardant effectiveness of organophosphorus compounds (OPCs) as additives in electrolyte solvents, a series of tests were conducted. Results showed that small amounts of OPCs had significant flame-retardant effects, but the efficiency decreased with the higher OPC additions The effectiveness of four OPCs was distinguished as well. The results of this work provided valuable information about the flammability limits of single and mixed electrolyte solvents, and it may be useful for designing electrolyte balanced in both performance and safety.

Experimental Thermal and Fluid Science published new progress about Battery electrolytes. 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

Uludag, Ahsen Akbulut published the artcileLife Cycle Analysis of Lithium-Air Batteries Designed with TEGDME-LiPF6/PVDF Aprotic Electrolytes, Quality Control of 143-24-8, the main research area is life cycle assessment lithium air battery aprotic electrolyte.

In this study, possible environmental effects of lithium-air battery production and use in elec. vehicles are studied using life cycle assessment (LCA). TEGDME + LiPF6/1% wt PVDF electrolyte is selected, and 0.5% wt Al2O3 and 0.5% wt SiO2 nanoparticles are added sep. to this electrolyte. The batteries are produced and tested under laboratory conditions, and 25 kW h power packs are modeled with different electrolytes. A functional unit “”environmental impact per 1 km”” is chosen. The battery modeled with 0.5% wt SiO2 added electrolyte has a low global warming potential (GWP) of 83.5 g CO2-eq/km. Because of the low energy potential, the 0.5% wt Al2O3 added battery exhibits the highest GWP at 158 g CO2-eq/km. It is determined that the environmental effects of batteries are largely due to the high elec. energy needed during the cathode production for the battery cell. While the GWP of a 1% wt poly(vinylidene difluoride) (PVDF) battery is caused by 68.4% of the battery production process, this ratio is 93.3% for 0.5% wt Al2O3 added battery. It is determined that the lithium-air battery technol. has lower emission values than internal combustion engines operating with fossil fuels.

ACS Sustainable Chemistry & Engineering published new progress about Battery electrolytes. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Quality Control of 143-24-8.

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

Morimoto, Kota published the artcileDynamic Changes in Charge Transfer Resistances during Cycling of Aprotic Li-O2 Batteries, HPLC of Formula: 143-24-8, the main research area is lithium oxygen battery electrolyte nondestructive electrochem impedance spectroscopy; Li−O2 batteries; cycle stability; electrochemical impedance spectroscopy; redox mediators; secondary batteries.

Various electrolyte components have been investigated with the aim of improving the cycle life of lithium-oxygen (Li-O2) batteries. A tetraglyme-based electrolyte containing dual anions of Br- and NO3- is a promising electrolyte system in which the cell voltage during charging is reduced because of the redox-mediator function of the Br-/Br3- and NO2-/NO2 couples, while the Li-metal anode is protected by Li2O formed via the reaction between Li metal and NO3-. To maximize the potential of this system, the fundamental factors that limit the cycle life should be clarified. In the present work, we used nondestructive electrochem. impedance spectroscopy to analyze the temporal change of the charge transfer resistances during cycles of Li-O2 batteries with dual anions. The charge transfer resistance at the cathode was revealed to exhibit good correlation with the reduction of the discharge voltage. These results, combined with the results of electrode surface inspections, revealed that irreversible accumulation of insulating deposits such as Li2O2 and Li2CO3 on the cathode surface was a major cause of the short cycle life. Furthermore, the analyses of the time course of the solution resistance suggested that diminished reactivity between the redox mediators and Li2O2 was a critical factor that led to the irreversible accumulation of the less-reactive Li2O2 on the cathode and eventually to a shortened cycle life. These findings indicated that increasing the reactivity between Br3- and Li2O2 is essentially important for improving the cycle stability of Li-O2 batteries and the reactivity can be nondestructively assessed by tracking the dynamic changes in the solution resistance.

ACS Applied Materials & Interfaces published new progress about Battery electrolytes. 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

Bi, Xuanxuan published the artcileCation Additive Enabled Rechargeable LiOH-Based Lithium-Oxygen Batteries, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium oxygen batteries hydroxide electrolyte; LiOH; cation additive; lithium air batteries; lithium hydroxide; lithium-oxygen batteries.

Lithium-oxygen (Li-O2) batteries have attracted extensive research interest due to their high energy d. Other than Li2O2 (a typical discharge product in Li-O2 batteries), LiOH has proved to be electrochem. active as an alternative product. Here we report a simple strategy to achieve a reversible LiOH-based Li-O2 battery by using a cation additive, sodium ions, to the lithium electrolyte. Without redox mediators in the cell, LiOH is detected as the sole discharge product and it charges at a low charge potential of 3.4 V. A solution-based reaction route is proposed, showing that the competing solvation environment of the catalyst and Li+ leads to LiOH precipitation at the cathode. It is critical to tune the cell chem. of Li-O2 batteries by designing a simple system to promote LiOH formation/decomposition

Angewandte Chemie, International Edition published new progress about Battery electrolytes. 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

Wang, Zhiqun published the artcileCerium triflate as superoxide radical scavenger to improve cycle life of Li-O2 battery, Synthetic Route of 143-24-8, the main research area is cerium triflate superoxide radical scavenger lithium oxide battery.

Cerium triflate (Ce(CF3SO3)3) is used as a superoxide radical scavenger in the ether-based liquid electrolyte for the Li-O2 batteries. The radical scavenging capability of Ce3+ is evaluated both in potassium superoxide + crown solution and the Li-O2 batteries. The chem. analyses further demonstrate cerium ions can effectively slow down the decomposition of electrolyte attacked by superoxide radicals. When the capacity is fixed to 1000 mAh g-1 at a c.d. of 500 mA g-1, the Li-O2 battery with 1M LiTFSI-TEGDME electrolyte begins to drop its discharge voltage rapidly to 2.0 V near 40th cycle while the electrolyte with Ce3+ additives is still above 2.0 V after 88 cycles, demonstrating the cycle life of the Li-O2 batteries show remarkably improved compared to the Li-O2 batteries without any additive into electrolyte.

Journal of Power Sources published new progress about Battery electrolytes. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Synthetic Route of 143-24-8.

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