Month: November 2022

Haecker, Joachim published the artcileOperando UV/vis Spectroscopy Providing Insights into the Sulfur and Polysulfide Dissolution in Magnesium-Sulfur Batteries, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is magnesium sulfur battery polysulfide dissolution.

The magnesium-sulfur battery represents a promising post-lithium system with potentially high energy d. and improved safety. However, just as all metal-sulfur systems, it is plagued with the polysulfide shuttle leading to active material loss and surface layer formation on the anode. To gain further insights, the present study aims to shed light on the dissolution characteristics of sulfur and polysulfides in glyme-based electrolytes for magnesium-sulfur batteries. Therefore, operando UV/vis spectroscopy and imaging were applied to survey their concentration in solution and the separator coloration during galvanostatic cycling. The influence of conductive cathode additives (carbon black and titanium nitride) on the sulfur retention and cycling overpotentials were investigated. Thus, valuable insights into the system′s reversibility and the benefit of addnl. reaction sites are gained. On the basis of these findings, a reduction pathway is proposed with S8, S62-, and S42- being the present species in the electrolyte, while the dissolution of S82- and S3•- is unfavored. In addition, the evolution of the sulfur species concentration during an extended rest at open-circuit voltage was investigated, which revealed a three-staged self-discharge.

ACS Energy Letters published new progress about Carbon black Role: TEM (Technical or Engineered Material Use), USES (Uses). 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

Torayev, Amangeldi published the artcileProbing and Interpreting the Porosity and Tortuosity Evolution of Li-O2 Cathodes on Discharge through a Combined Experimental and Theoretical Approach, Product Details of C10H22O5, the main research area is dimethoxyethane tetraglyme lithium oxygen battery kinetic Monte Carlo model.

Li-O2 batteries offer a high theor. discharge capacity due to the formation of light discharged species such as Li2O2, which fill the porous pos. electrode. However, in practice, it is challenging to reach the theor. capacity and completely utilize the full electrode pore volume during discharge. With the formation of discharge products, the porous medium evolves, and the porosity and tortuosity factor of the pos. electrode are altered through shrinkage and clogging of pores. A pore shrinks as solid discharge products accumulate, the pore clogging when it is filled (or when access is blocked). In this study, we investigate the structural evolution of the pos. electrode through a combination of exptl. and computational techniques. Pulsed field gradient NMR results show that the electrode tortuosity factor changes much faster than suggested by the Bruggeman relation (an equation that empirically links the tortuosity factor to the porosity) and that the electrolyte solvent affects the tortuosity factor evolution. The latter is ascribed to the different abilities of solvents to dissolve reaction intermediates, which leads to different discharge product particle sizes: on discharging using 0.5 M LiTFSI in dimethoxyethane, the tortuosity factor increases much faster than for discharging in 0.5 M LiTFSI in tetraglyme. The correlation between a discharge product size and tortuosity factor is studied using a pore network model, which shows that larger discharge products generate more pore clogging. The Knudsen diffusion effect, where collisions of diffusing mols. with pore walls reduce the effective diffusion coefficients, is investigated using a kinetic Monte Carlo model and is found to have an insignificant impact on the effective diffusion coefficient for mols. in pores with diameters above 5 nm, i.e., most of the pores present in the materials investigated here. As a consequence, pore clogging is thought to be the main origin of tortuosity factor evolution.

Journal of Physical Chemistry C published new progress about Carbon black Role: TEM (Technical or Engineered Material Use), USES (Uses). 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

Zhang, Pengxiang published the artcileMOF-template derived hollow CeO2/Co3O4 polyhedrons with efficient cathode catalytic capability in Li-O2 batteries, Synthetic Route of 143-24-8, the main research area is caria cobalt oxide cathode catalytic capability lithium battery.

Li-O2 batteries (LOBs) have been perceived as the most potential clean energy system for fast-growing elec. vehicles by reason of their environmentally friendlier, high energy d. and high reversibility. However, there are still some issues limiting the practical application of LOBs, such as the large gap between the actual capacity level and the theor. capacity, low rate performance as well as short cycle life. Herein, hollow CeO2/Co3O4 polyhedrons have been synthesized by MOF template with a simple method. And it is was further served as a cathode catalyst in Li-O2 batteries. By means of the synergistic effect of two different transition metal oxides, nano-sized hollow porous CeO2/Co3O4 cathode obtained better capacity and cycle performance. As a result, excellent cyclability of exceeding 140 and 90 cycles are achieved at a fixed capacity of 600 and 1000 mAh/g, resp. The successful application of this catalyst in LOBs offers a novel route in the aspect of the synthesis of other hollow porous composite oxides as catalysts for cathodes in LOBs systems by the MOF template method.

Chinese Chemical Letters published new progress about Carbon black Role: TEM (Technical or Engineered Material Use), USES (Uses). 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

Wang, Wenjuan published the artcileRational Construction of Sulfur-Deficient NiCo2S4-x Hollow Microspheres as an Effective Polysulfide Immobilizer toward High-Performance Lithium/Sulfur Batteries, Product Details of C10H22O5, the main research area is hollow microsphere nickel cobalt sulfide polysulfide immobilizer; lithium sulfur battery.

The synergistic strategy combining architectural design with defect engineering in transition-metal sulfides offers a promising opportunity to realize high-efficiency polysulfide adsorption/conversion surface catalysis in lithium/sulfur (Li/S) batteries. Here, defect-rich yolk-shell hollow spheres composed of ultrafine NiCo2S4-x nanoparticles as sulfur hosts prepared by an anion-exchange method are reported. The elaborate design of sulfur defects endows the NiCo2S4-x hollow spheres with significantly enhanced electronic conductivity and superior affinity for polysulfides as well as expedited sulfur conversion. Meanwhile, the unique yolk-shell NiCo2S4-x hollow sphere structure provides large cavities that not only increase sulfur storage but also relieve the electrode volume expansion during cycling. Combining these favorable features, the NiCo2S4-x-hosted sulfur cathode revealed enhanced cycling stability, corresponding to a negligible capacity fading rate of 0.0754% per cycle after 500 cycles at 1 C, and achieved an outstanding rate capability (628.9 mA-h g-1 up to 5 C).

ACS Applied Energy Materials published new progress about Carbon black Role: TEM (Technical or Engineered Material Use), USES (Uses). 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

Li, Zhejun published the artcileDesigning Effective Solvent-Catalyst Interface for Catalytic Sulfur Conversion in Lithium-Sulfur Batteries, Name: 2,5,8,11,14-Pentaoxapentadecane, the main research area is solvent catalyst interface effect polysulfide reduction sulfur lithium battery.

S-based redox materials are promising next-generation energy storage solutions Identifying electrode and electrolyte properties that facilitate polysulfide reduction reactions is critical for rational material designs for S-based batteries. The authors reveal that the effectiveness of the polysulfide reduction is governed by the resolved binding strength of polysulfide on the electrode surface, which is dictated by the competition between electrode’s polysulfide chemisorption strength and solvent’s polysulfide solvation strength. Using Ti-based model compounds (TiX) as examples, the polysulfide reduction kinetics and S use increase with increasing polysulfide chemisorption strength of TiX, which can be associated with the decreasing electronegativity of nonmetal element (X). Strong coordinating solvent reduces catalyst’s efficacy by reducing the binding strength between polysulfide and the catalysts, highlighting that a weak solvent coordination is a critical selection criterion for effective catalysis in Li-S batteries. The study reveals phys. origins controlling the catalytic processes of polysulfide reduction reactions and unravels the interplay of solvent-polysulfide-catalyst competition for achieving higher-energy and reversible S-based energy storage.

Chemistry of Materials published new progress about Carbon black Role: TEM (Technical or Engineered Material Use), USES (Uses). 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

Li, Wenbiao published the artcileAnthraquinone-Catalyzed TEMPO Reduction to Realize Two-Electron Energy Storage of Poly(TEMPO-methacrylate), Quality Control of 143-24-8, the main research area is anthraquinone catalyzed reduction electron energy storage poly methacrylate.

2,2,6,6-Tetramethylpiperidine-1-oxyl (TEMPO) functional polymers are a type of organic electroactive material featuring a two-electron redox process. However, the electrochem. reduction of TEMPO (TEMPO•/-) is rarely adopted for energy storage due to its slow reaction kinetics. Here, we report using anthraquinone (AQ) as an organic redox mediator to promote TEMPO reduction kinetics. The catalytic effect of AQ is verified by electrochem. in situ FTIR spectroscopy in a model three-electrode system and further evidenced by cyclic voltammetry and chronoamperometry, providing a turnover frequency of 69 h-1. To exemplify the AQ catalytic effect in energy storage performance, we incorporate AQ groups into a typical TEMPO polymer (i.e., poly(TEMPO-methacrylate), PTMA). The AQ-catalyzed TEMPO reduction and AQ/carbon π-π interaction synergistically reduce the heterogeneous charge transfer resistance and accelerate the kinetics of the TEMPO•/- process in the PTMA electrode. The half-cell tests of the AQ functional PTMA show two prominent discharge plateaus with an initial capacity of 174 mAh g-1 and a 0.18% capacity loss per cycle. Moreover, the discharge capacity based on the TEMPO•/- couple is about 85 mAh g-1, 30% higher than that of the pristine PTMA. This new strategy could be widely applied to various organic redox systems to enhance their electrochem. kinetics and particularly improve the energy storage performance of organic polymer redox materials.

ACS Energy Letters published new progress about Carbon black Role: TEM (Technical or Engineered Material Use), USES (Uses). 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

Bloi, Luise Maria published the artcileSodium Sulfide Cathodes Superseding Hard Carbon Pre-sodiation for the Production and Operation of Sodium-Sulfur Batteries at Room Temperature, Formula: C10H22O5, the main research area is sodium sulfide battery carbon cathode superseding fabrication morphol.

This study demonstrates for the first time a room temperature sodium-sulfur (RT Na-S) full cell assembled based on a pristine hard carbon (HC) anode combined with a nanostructured Na2S/C cathode. The development of cells without the demanding, time-consuming and costly pre-sodiation of the HC anode is essential for the realization of practically relevant RT Na-S prototype batteries. New approaches for Na2S/C cathode fabrication employing carbothermal reduction of Na2SO4 at varying temperatures (660 to 1060°C) are presented. Initial evaluation of the resulting cathodes in a dedicated cell setup reveals 36 stable cycles and a capacity of 740 mAh gS-1, which correlates to ~85% of the maximum value known from literature on Na2S-based cells. The Na2S/C cathode with the highest capacity utilization is implemented into a full cell concept applying a pristine HC anode. Various full cell electrolyte compositions with fluoroethylene carbonate (FEC) additive have been combined with a special charging procedure during the first cycle supporting in situ solid electrolyte interphase (SEI) formation on the HC anode to obtain increased cycling stability and cathode utilization. The best performing cell setup has delivered a total of 350 mAh gS-1, representing the first functional full cell based on a Na2S/C cathode and a pristine HC anode today.

Advanced Energy Materials published new progress about Carbon black Role: TEM (Technical or Engineered Material Use), USES (Uses). 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Formula: C10H22O5.

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

Salteris, Constantinos S. published the artcileOrtho-directed lithiation of ω-phenoxyalkanethiols and N,N-dimethyl-ω-phenoxyalkylamines. Crystal structure of bis[o-[(2-dimethylamino)ethoxy]phenyl]mercury, Safety of (2-Chloroethoxy)benzene, the main research area is crystal mol structure mercury aminoethoxyphenyl preparation; ortho lithiation phenoxyalkanethiol phenoxyalkylamine.

ω-Phenoxyalkanethiols, PhO(CH2)nSH (n = 2-6) were prepared and ortho-metalated with two equiv BuLi in THF/methylcyclohexane. Carboxylation and subsequent acidic hydrolysis of the resulting dilithiated species yielded the corresponding o-(ω-mercaptoalkoxy)benzoic acids in 30-78% yields%. The previously reported methodol. for the ortho-lithiation of (2-dimethylamino)ethoxy-benzene by BuLi in ether was extended to higher members of this class, PhO(CH2)nNMe2 with n = 2-4. The resulting organolithiums react normally with electrophilic reagents, benzaldehyde (n = 2-4), benzophenone (n = 2-4) and dichlorodiphenylsilane (n = 2) in yields of 63-77%; reaction with 0.5 molar equiv of mercuric dichloride (n = 2) afforded the bis[o-[(2-dimethylamino)ethoxy]phenyl]mercury in a 78% yield, the crystal structure of which was determined

Main Group Metal Chemistry published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent) (phenoxyalkylamines). 622-86-6 belongs to class ethers-buliding-blocks, name is (2-Chloroethoxy)benzene, and the molecular formula is C8H9ClO, Safety of (2-Chloroethoxy)benzene.

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

Li, Zhongle published the artcileActivity of bacteria isolated from bats against Pseudogymnoascus destructans in China, Formula: C11H16O2, the main research area is Rhinolophus isoprenol octanoicacid antifungal agent Pseudogymnoascus.

White-nose syndrome, a disease that is caused by the psychrophilic fungus Pseudogymnoascus destructans, has threatened several North America bat species with extinction. Recent studies have shown that East Asian bats are infected with P. destructans but show greatly reduced infections. While several factors have been found to contribute to these reduced infections, the role of specific microbes in limiting P. destructans growth remains unexplored. We isolated three bacterial strains with the ability to inhibit P. destructans, namely, Pseudomonas yamanorum GZD14026, Pseudomonas brenneri XRD11711 and Pseudomonas fragi GZD14479, from bats in China. Pseudomonas yamanorum, with the highest inhibition score, was selected to extract antifungal active substance. Combining mass spectrometry (MS) and NMR (NMR) spectroscopy analyses, we identified the active compound inhibiting P. destructans as phenazine-1-carboxylic acid (PCA), and the minimal inhibitory concentration (MIC) was 50.12μg ml-1. Whole genome sequencing also revealed the existence of PCA biosynthesis gene clusters. Gas chromatog.-mass spectrometry (GC-MS) anal. identified volatile organic compounds The results indicated that 10 ppm octanoic acid, 100 ppm 3-tert-butyl-4-hydroxyanisole (isoprenol) and 100 ppm 3-methyl-3-buten-1-ol (BHA) inhibited the growth of P. destructans. These results support that bacteria may play a role in limiting the growth of P. destructans on bats.

Microbial Biotechnology published new progress about 16S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 121-00-6 belongs to class ethers-buliding-blocks, name is 4-Hydroxy-3-tert-butylanisole, and the molecular formula is C11H16O2, Formula: C11H16O2.

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

Huff Chester, Anndee published the artcileContaminants of Emerging Concern in the Lower Volta River, Ghana, West Africa: The Agriculture, Aquaculture, and Urban Development Nexus, Quality Control of 121-00-6, the main research area is emerging concern contaminant Volta river Ghana West Africa; Contaminants of emerging concern; Ecotoxicology; Environmental chemistry; Microbial toxicology; Organic contaminants.

Contaminants of emerging concern (CECs) are ubiquitous in aquatic environments across all continents and are relatively well known in the developed world. However, few studies have investigated their presence and biol. effects in low- and middle-income countries. We provide a survey of CEC presence in the Volta River, Ghana, and examine the microbial consequences of anthropogenic activities along this economically and ecol. important African river. Water and sediment samples were taken by boat or from shore at 14 sites spanning 118 km of river course from the Volta estuary to the Akosombo dam. Sample extracts were prepared for targeted anal. of antimicrobial CECs, N,N-diethyl-meta-toluamide, and per- and polyfluoroalkyl substances (PFAS; water only). Concurrent samples were extracted to characterize the microbial community and antibiotic-resistant genes (ARGs). Antibiotics and PFAS (PFAS, 2-20 ng/L) were found in all water samples; however, their concentrations were usually in the low nanograms per L range and lower than reported for other African, European, and North American studies. N,N-Diethyl-meta-toluamide was present in all samples. The number of different genes detected (between one and 10) and total ARG concentrations varied in both water (9.1 x 10-6 to 8.2 x 10-3) and sediment (2.2 x 10-4 to 5.3 x 10-2), with increases in gene variety at sites linked to urban development, sand mining, agriculture, and shellfish processing. Total ARG concentration spikes in sediment samples were associated with agriculture. No correlations between water quality parameters, CEC presence, and/or ARGs were noted. The presence of CECs in the lower Volta River highlights their global reach. The overall low concentrations of CECs detected is encouraging and, coupled with mitigation measures, can stymie future CEC pollution in the Volta River.

Environmental Toxicology and Chemistry published new progress about 16S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 121-00-6 belongs to class ethers-buliding-blocks, name is 4-Hydroxy-3-tert-butylanisole, and the molecular formula is C11H16O2, Quality Control of 121-00-6.

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