Month: November 2022

Kosir, Urban published the artcilePolysulfide species in various electrolytes of Li-S batteries – a chromatographic investigation, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is polysulfide species various electrolyte lithium sulfur batteries chromatog.

The HPLC method including derivatization was used for the determination of polysulfide species concentration during the operation of Li-S battery cells. A comparison was made between a glyme based electrolyte, which exhibits high polysulfide solubility, and a fluorinated ether based electrolyte, which probably reduces the dissolution and diffusion of polysulfides. A sep. anal. was conducted on porous C cathodes and separators obtained from cycled battery cells. The determination of the species concentration trends allowed a deeper understanding of the differences in battery cell operating mechanism. Polysulfide species are formed in similar concentrations in both examined electrolytes, but they remain trapped in the cathode pores in the fluorinated ether based electrolyte Li-S battery cells. The polysulfide concentration in the separators of the fluorinated ether cells was below the limit of detection, which indicates that the solubilities of polysulfides in the fluorinated electrolyte are <50μM. This results in absence of disproportionation or coproportionation reactions between the polysulfide species in solution This different mechanism influences the change in length and potential of the voltage plateaus of the battery cells during galvanostatic cycling. Electrochimica Acta 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

Mukra, Tzach published the artcileDisiloxane with nitrile end groups as Co-solvent for electrolytes in lithium-sulfur batteries – A feasible approach to replace LiNO3, Related Products of ethers-buliding-blocks, the main research area is disiloxane nitrile solvent electrolyte lithium sulfur battery nitrate solvent.

The Li-S battery is a leading candidate for a new-generation Li-ion battery, because of its high theor. capacity and abundance of S. Yet, the flammability of either the organic-carbonate or ether-based electrolytes used in such battery systems is of concern. Also, the oxidation of Li2S gives polysulfides (Li2S3-8), which dissolve in the electrolyte and initiate a shuttle mechanism, which results in low Coulombic efficiency and growth of a thick SEI on the anode. Therefore, various electrolyte additives, like LiNO3, are added to the electrolyte. Unfortunately, the nitrate additive is gradually consumed and the shuttle effect resumes. Here the authors present a LiNO3-free electrolyte consisting of nitrile-functionalized disiloxane (TmdSx-CN) with dissolved LiTFSI as a candidate electrolyte for Li-S batteries. The authors have examined the effect of TmdSx-CN as a co-solvent along with 1,3-dioxolane (DOL) on the performance of Li/S cells. LiNO3-free TmdSx-CN:DOL electrolyte mitigates the polysulfide shuttle. The cell containing this electrolyte yields an average capacity of 700 mAh g-1 and 96% Coulombic efficiency for >100 cycles. Also, 87.5% energy efficiency, which is similar to the LiNO3-based control cell. The authors expect that the authors’ preliminary results will encourage the further use of siloxane-based electrolytes in metallic-Li battery systems, and specifically, in Li-S batteries.

Electrochimica Acta 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

Zhang, Qi published the artcileHigh-performance Li-O2 batteries enabled by dibenzo-24-crown-8 aldehyde derivative as electrolyte additives, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium ion battery electrolyte additive aldehyde derivative.

Aprotic Li-O2 batteries (LOB) with high theor. energy d. usually experience cathode clogging by insoluble Li2O2, along with high charge overpotential from its insulating nature. A dibenzo-24-crown-8 aldehyde derivative (DB24C8A) is employed as an additive to enhance the binding strength with Li+, hence promoting the solubility of Li2O2. The generated [DB24C8A•Li+] avoids the parasitic reactions caused by reactive O2-. Thus, the LOB achieves a large discharge capacity of 6939 mAh g-1 at 200 mA g-1 and a high Li2O2 yield (≈93%). Moreover, DB24C8A facilitates the efficient decomposition of Li2O2 via Li+ coordination during the charge process, reducing the charge overpotential to 0.77 V and prolonging the lifetime of the LOB over 213 cycles at 1000 mAh g-1 and 500 mA g-1. This work provides a novel approach to boost the performance of LOB by incorporation of crown ether-based compounds to regulate the Li2O2 growth and decomposition pathway.

Advanced 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, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane.

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

Lin, Qiaowei published the artcileHigh-performance lithium-sulfur batteries enabled by regulating Li2S deposition, SDS of cas: 143-24-8, the main research area is indium tin oxide lithium sulfur battery.

Lithium-sulfur batteries (LSBs) have received intensive attention in recent years due to their high theor. energy d. derived from the lithiation of sulfur. In the discharge process, sulfur transforms into lithium polysulfides (LiPSs) that dissolve in liquid electrolytes and then into insoluble Li2S precipitated on the electrode surface. The electronically and ionically insulating Li2S leads to two critical issues, including the sluggish reaction kinetics from LiPSs to Li2S and the passivation of the electrode. In this regard, controlling the Li2S deposition is significant for improving the performance of LSBs. In this perspective, we have summarized the recent achievements in regulating the Li2S deposition to enhance the performance of LSBs, including the solution-mediated growth of Li2S, sulfur host enhanced nucleation and catalysis induced kinetic improvement. Moreover, the challenges and possibilities for future research studies are discussed, highlighting the significance of regulating the Li2S deposition to realize the high electrochem. performance and promote the practical uses of LSBs.

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, SDS of cas: 143-24-8.

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

Soga, Shuhei published the artcileAmbient air operation rechargeable lithium-air battery with acetic acid catholyte, HPLC of Formula: 143-24-8, the main research area is rechargeable lithium air battery acetic acid catholyte.

Lithium-air batteries are expected as next-generation secondary batteries for elec. vehicles because of their high energy d. In particular, an aqueous lithium-air battery that uses an aqueous electrolyte has advantages such as a high power d. and availability of operation under an air atm. Here, we show the feasibility of an acidic aqueous lithium-air battery that consists of a lithium anode, a lithium-ion conducting liquid interlayer, a solid lithium-ion conductor separator of Li1.4Al0.4Ge0.2Ti1.4(PO4)3, an acetic acid catholyte, and a fuel cell-analogous air electrode. The theor. energy d. of this system based on the masses of the lithium anode, oxygen, and acetic acid is 1340 Wh kg-1. This system was successfully cycled at 0.2 mA cm-2 for 5 h polarization and room temperature under an air atm. for 30 cycles.

Journal of the Electrochemical Society 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

Mutlu, Tutku published the artcileCarbonate or ether based electrolyte for Li-Se batteries: An in-situ study of intermediate polyselenide formation, SDS of cas: 143-24-8, the main research area is carbonate ether electrolyte lithium selenium battery intermediate polyselenide formation.

Li-Se batteries have recently been considered as one of the most promising battery systems to satisfy the future energy storage needs. However, to further improve the electrochem. cell performances, understanding of the Li-Se cell working mechanism, especially focusing on the formation of dissolved Li polyselenides, is essential. An in-situ study of intermediate polyselenide formation based on the 4-electrode cycling voltammetry (CV) and 3-electrode electrochem. impedance spectroscopy (EIS) were used to detect the existence of polyselenides in carbonate and ether-based electrolytes. CV measurements reveal dissolved polyselenide intermediate formations in ether-based solvent while no signatures are observed in carbonate-based electrolytes. Similar findings are also observed by EIS measurements as well as studying the self-discharge behavior. Therefore, these two electrochem. characterizations can be easily implemented as prompt and cost-effective techniques to study the impact of the electrolyte solvents. Contrary to the Li-S counterparts, the outcome of the work suggests that carbonate-based electrolytes can be simply employed in the field of Li-Se batteries.

Electrochimica Acta 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

Brilloni, Alessandro published the artcileImproving the Electrical Percolating Network of Carbonaceous Slurries by Superconcentrated Electrolytes: An Electrochemical Impedance Spectroscopy Study, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is carbonaceous slurry superconcentrated electrolyte electrode electrochem impedance; electrical percolating network; electrochemical impedance spectroscopy; optical fluorescence microscopy; semisolid redox flow battery; semisolid slurry; semisolid slurry viscosity; superconcentrated electrolyte.

Semisolid redox flow batteries simultaneously address the need for high energy d. and design flexibility. The elec. percolating network and electrochem. stability of the flowable electrodes are key features that are required to fully exploit the chem. of the semisolid slurries. Superconcd. electrolytes are getting much attention for their wide electrochem. stability window that can be exploited to design high-voltage batteries. Here, we report on the effect of the ion concentration of superconcd. electrolytes on the electronic percolating network of carbonaceous slurries. Slurries based on different concentrations of lithium bis(trifluoromethane)sulfonamide in tetraethylene glycol di-Me ether (0.5, 3, and 5 mol/kg) at different content of Pureblack carbon (from 2 up to 12 wt %) have been investigated. The study was carried out by coupling electrochem. impedance spectroscopy (EIS), optical fluorescence microscopy, and rheol. measurements. A model that describes the complexity and heterogeneity of the semisolid fluids by multiple conductive branches is also proposed. For the first time, to the best of our knowledge, we demonstrate that besides their recognized high electrochem. stability, superconcd. electrolytes enable more stable and electronically conductive slurry. Indeed, the high ionic strength of the superconcd. solution shields interparticle interactions and enables better carbon dispersion and connections.

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, Safety of 2,5,8,11,14-Pentaoxapentadecane.

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

Kim, Jinuk published the artcileDesigning fluorine-free electrolytes for stable sodium metal anodes and high-power seawater batteries via SEI reconstruction, Application In Synthesis of 143-24-8, the main research area is fluorine electrolyte sodium metal anode SEI power seawater battery.

Fluorine (F) is regarded as a key element in electrolytes for sodium metal anodes (SMAs) because of the formation of NaF containing solid-electrolyte interphase (SEI) layers; however, the high-cost and HF formation issues experienced by F-based electrolytes should be addressed. Herein, F-free, cost-effective 1 M NaBH4/ether-based electrolytes are proposed, motivated by the recent speculation that NaH is a “”good SEI layer””. The time-of-flight secondary ion mass spectrometry (TOF-SIMS) results of sodium metal electrodes after galvanostatic cycling demonstrated that NaH is a major component of the SEI layer. In addition, the native oxide surface of sodium was converted into NaH and NaBO2 after soaking in the electrolytes, implying that “”SEI reconstruction”” occurred by chem. reduction Accordingly, significantly longer cyclability was obtained in the NaNa sym. cell (1200 h, 1 mA cm-2, 1 mA h cm-2) than in F-based electrolytes. In seawater batteries (SWBs), 1 M NaBH4/DEGDME (diethylene glycol di-Me ether) delivers higher power d. (2.82 mW cm-2vs. 2.27 mW cm-2) and cyclability (300 h vs. 50 h) under 1 mA cm-2 than 1 M NaOTf/TEGDME (tetraethylene glycol di-Me ether), which is commonly used in SWBs. In conclusion, two novel contributions of this study include the demonstration that NaH can work as a “”good SEI layer”” apart from NaF and the proposal of a cost-effective, F-free electrolyte for practical and large-scale SWBs.

Energy & Environmental Science published new progress about Batteries (seawater). 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

Pereira, Ulisses A. published the artcileInhibition of Enterococcus faecalis biofilm formation by highly active lactones and lactams analogs of rubrolides, Recommanded Product: 2-Methoxy-5-methylphenylboronic acid, the main research area is Enterococcus biofilm inhibition rubrolide analog; Anti-biofilm activity; Quorum sensing antagonist; Rubrolides; γ-Alkylidene-γ-lactams; γ-Alkylidene-γ-lactones; γ-Hydroxy-γ-lactams.

Seven β-aryl substituted γ-alkylidene-γ-lactones analogs of rubrolides were synthesized from mucobromic acid and converted through a lactamization with isobutylamine into their corresponding γ-hydroxy-γ-lactams (76-85%). These lactams were converted into (Z)- and (E)-γ-alkylidene-γ-lactams (23-45%). All compounds were fully characterized by IR, NMR (1H and 13C), COSY and HETCOR bidimensional experiments, and NOE difference spectroscopy experiments when necessary. Evaluation of these three different classes of compounds against Enterococcus faecalis biofilm formation showed that all classes are active and the highest biofilm inhibition activity was caused by lactam 13f (IC50 = 0.76 μg/mL). Moreover, in almost all cases at least one of the lactams is more active than its correspondent γ-alkylidene-γ-lactone. The use of rubrolides as a lead structure has proven successful for the identification of new compounds displaying novel antibacterial activities, namely biofilm inhibition, which have the potential for the development of antimicrobial drugs targeted to inhibition of the initial stages of bacterial infections, rather than bacterial viability. Such drugs are less prompt to induce bacterial resistance, being therefore a more cost-effective investment for pharmaceutical research.

European Journal of Medicinal Chemistry published new progress about Antibacterial agents. 127972-00-3 belongs to class ethers-buliding-blocks, name is 2-Methoxy-5-methylphenylboronic acid, and the molecular formula is C8H11BO3, Recommanded Product: 2-Methoxy-5-methylphenylboronic acid.

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

Reddy, S. M. published the artcileSynthesis and antimicrobial activity studies of microwave irradiated in (4-chlorophenyl)(6-methylpyridin-3-yl) derivatives, Application of 1-(4-Methoxypyridin-2-yl)ethan-1-amine, the main research area is pyrazine pyridine preparation antibacterial antifungal.

A series of pyrazine and pyridine derivatives was synthesized and evaluated for their antimicrobial activities against two gram-pos. bacteria (Staphylococcus aureus, Bacillus subtilis) and two gram-neg. bacteria (Escherichia coli and Pseudomonas aeruginosa) and two fungi (Aspergillus niger and Aspergillus fumigatus) strains using cup plate method.

Pharma Chemica published new progress about Antibacterial agents. 58088-65-6 belongs to class ethers-buliding-blocks, name is 1-(4-Methoxypyridin-2-yl)ethan-1-amine, and the molecular formula is C8H12N2O, Application of 1-(4-Methoxypyridin-2-yl)ethan-1-amine.

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