Tag: M.W=200-250

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

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

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

Wang, Gulian published the artcileOrganic polymeric filler-amorphized poly(ethylene oxide) electrolyte enables all-solid-state lithium-metal batteries operating at 35°C, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium sulfur battery polymer gel electrolyte PEO.

The poor ionic conductivity and high working temperatures (normally >60°C) of poly (ethylene oxide) (PEO)-based solid polymer electrolytes (SPEs) greatly limit their application in all-solid-state batteries. To mitigate these issues, for the first time, we report here an organic polymer filler, hydrolyzed polymaleic anhydride (HPMA), that can greatly suppress PEO crystallinity, enhance the ionic conductivity of PEO-based SPEs (1.13 x 10-4 S cm-1 at 35°C) and support battery operation at 35°C. PEO-HPMA SPEs feature high flexibility, incombustibility, wide electrochem. operating window and stability against lithium. The as-derived Li/PEO-HPMA/LiFePO4 all-solid-state batteries show outstanding rate capability, high reversible capacity and long-term stability up to 1250 cycles. More impressively, the soft-packaged Li/PEO-HPMA/LiFePO4 cells show high safety under various extreme conditions such as cutting and perforation. The PEO-HPMA SPE-based quasi-solid-state lithium-sulfur batteries are also presented. This work demonstrates a facile approach that unlocks the low-temperature application of PEO SPE-based all-solid-state batteries.

Journal of Materials Chemistry A: Materials for Energy and Sustainability 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, Safety of 2,5,8,11,14-Pentaoxapentadecane.

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

Tang, Michael published the artcileGlyme-based electrolyte formulation analysis in aprotic lithium-oxygen battery and its cyclic stability, Formula: C10H22O5, the main research area is aprotic lithium oxygen battery glyme cyclic stability conductivity.

In this work, the effect of electrolyte composition was evaluated on lithium-oxygen (Li-O2) battery using carbon cloth air electrode. Seven ether-based solvents were measured for their conductivity, viscosity, contact angle and decomposition temperature The results were compiled with other phys. properties to screen potential solvents for future testing. Diglyme and tetraglyme were identified and each of them was individually mixed with one of four lithium salts, yielding eight combinations of electrolytes. These electrolytes were assembled into Li-O2 batteries and the voltage and capacity data were recorded during cycling discharge/charge test. The effects of organic electrolyte phys. properties on the battery impedance and cyclic life were discussed. Among the eight electrolytes, lithium bis(trifluoromethane) sulfonimide (LiTFSI) in tetraethylene glycol di-Me ether (tetraglyme) resulted in the longest cyclic life at a discharge capacity cutoff of 2000 mAh g-1Pt than other compositions This performance may be ascribed to the electrolyte’s high conductivity, sufficient viscosity and suitable contact angle with the air electrode.

Energy (Oxford, United Kingdom) published new progress about Electric impedance. 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

Huang, Zhanpeng published the artcileHigh-Capacity and Stable Sodium-Sulfur Battery Enabled by Confined Electrocatalytic Polysulfides Full Conversion, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is sodium sulfur battery electrocatalytic polysulfide full conversion.

The efficient polysulfide capture and reversible sulfur recovery during reverse charging process are critical to exploiting the full potential of room temperature Na-S batteries. Here, based on a core-shell design strategy, the structural and chem. synergistic manipulation of sodium polysulfides quasi-solid-state reversible conversion is proposed. The sulfur is encapsulated in the multi-pores of 3D interconnected carbon fiber as the core structure. The Fe(CN)64–doped polypyrrole film serves as a redox-active polar shell to lock up polysulfides and promote complete polysulfide conversion. Importantly, the short-chain Na2S4 polysulfides are reduced to Na2S directly leaving with a small fraction of soluble intermediates as the cation-transfer medium at the core/shell interface, and freeing up formation of solid Na2S2 incomplete product. Further, the redox mediator with open Fe species electrocatalytically lowers the Na2S oxidation energy barrier and renders the high reversibility of electrodeposited Na2S. The tunable quasi-solid-state reversible sulfur conversion under versatile polymer sheath greatly enhances sulfur utilization, affording a remarkable capacity of 1071 mAh g-1 and a stable high capacity of 700 mAh g-1 at 200 mA g-1 after 200 cycles. The confined electrocatalytic effect provides a strategy for tuning electrochem. pathway of sulfur species and guarantees high-efficiency sulfur electrochem.

Advanced Functional Materials 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 of 2,5,8,11,14-Pentaoxapentadecane.

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

Liu, Zhenjie published the artcileTaming Interfacial Instability in Lithium-Oxygen Batteries: A Polymeric Ionic Liquid Electrolyte Solution, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium oxygen battery polymeric ionic liquid taming interfacial instability.

There is a growing concern about the cyclability and safety, in particular, of the high-energy d. lithium-metal batteries. This concern is even greater for Li-O2 batteries because O2 that is transported from the cathode to the anode compartment, can exacerbate side reactions and dendrite growth of the lithium metal anode. The key to solving this dilemma lays in tailoring the solid electrolyte interphase (SEI) formed on the lithium metal anode in Li-O2 batteries. Here it is reported that a new electrolyte, formed from LiFSI as the salt and a mixture of tetraethylene glycol di-Me ether and polymeric ionic liquid of P[C5O2NMA,11]FSI as the solvent, can produce a stable electrode (both cathode and anode)|electrolyte interface in Li-O2 batteries. Specifically, this new electrolyte, when in contact with lithium metal anodes, has the ability to produce a uniform SEI with high ionic conductivity for Li+ transport and desired mech. property for suppression of dendritic lithium growth. Moreover, the electrolyte possesses a high oxidation tolerance that is very beneficial to the oxygen electrochem. on the cathode of Li-O2 batteries. As a result, enhanced reversibility and cycle life are realized for the resultant Li-O2 batteries.

Advanced Energy Materials published new progress about Electrode-electrolyte interface Role: PRP (Properties), 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, Safety of 2,5,8,11,14-Pentaoxapentadecane.

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

Falco, Marisa published the artcileUnderstanding the Effect of UV-Induced Cross-Linking on the Physicochemical Properties of Highly Performing PEO/LiTFSI-Based Polymer Electrolytes, Application In Synthesis of 143-24-8, the main research area is UV crosslinking physicochem polyethylene oxide lithium complex polymer electrolyte; magic angle spinning NMR spectroscopy Raman spectra polymer electrolyte.

The authors report a thorough, multitechnique study of the structure and transport properties of a UV-cross-linked polymer electrolyte based on poly(ethylene oxide), tetra(ethylene glycol)dimethyl ether (G4), and lithium bis(trifluoromethane)sulfonimide. The properties of the cross-linked polymer electrolyte are compared to those of a noncross-linked sample of same composition The effect of UV-induced crosslinking on the physico/chem. characteristics is evaluated by x-ray diffraction, DSC, shear rheol., 1H and 7Li magic angle spinning NMR spectroscopy, 19F and 7Li pulsed field gradient stimulated echo NMR analyses, electrochem. impedance spectroscopy, and Fourier transform Raman spectroscopy. Comprehensive anal. confirms that UV-induced crosslinking is an effective technique to suppress the crystallinity of the polymer matrix and reduce ion aggregation, yielding improved Li+ transport number ( > 0.5) and ionic conductivity ( > 0.1 mS/cm) at ambient temperature, by tailoring the structural/morphol. characteristics of the polymer matrix. Finally, the polymer electrolyte allows reversible operation with stable profile for hundreds of cycles upon galvanostatic test at ambient temperature of LiFePO4-based lithium-metal cells, which deliver full capacity at 0.05 or 0.1 C current rate and keep high rate capabilities up to 1C. This enforces the role of UV-induced crosslinking in achieving excellent electrochem. characteristics, exploiting a practical, easy up-scalable process.

Langmuir published new progress about Crystallinity. 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

Diederichsen, Kyle M. published the artcileElectrolyte additives to enable nonaqueous polyelectrolyte solutions for lithium ion batteries, COA of Formula: C10H22O5, the main research area is crown ether nonaqueous polyelectrolyte solution lithium ion battery.

Nonaqueous polyelectrolyte solutions, in which a neg. charged macromol. neutralized by lithium is dissolved in nonaqueous solvents, have shown promise as potential high transference number electrolytes. However, in battery-relevant carbonate solvents (ethylene carbonate/dimethyl carbonate blends), it has been shown that lithium ions do not readily dissociate from easily synthesized sulfonated polymers, despite the solvent’s high dielec. constant (∼50). In this work, a range of additives are screened to improve conductivity, and we demonstrate that the addition of less than 5 vol% of 15-crown-5 achieves an order of magnitude conductivity increase by selectively improving lithium dissociation Utilizing the optimized electrolyte, we show that polyelectrolyte solutions may be directly substituted for a standard electrolyte with com. electrodes in a graphite/LiFePO4 cell, providing further motivation for future study of these new electrolytes.

Molecular Systems Design & Engineering published new progress about Diffusion Role: PRP (Properties), 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, COA of Formula: C10H22O5.

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

Gao, Siliang published the artcileExtractive distillation of benzene, toluene, and xylenes from pyrolysis gasoline using methylsulfonylethane as a cosolvent, Formula: C9H20O5, the main research area is benzene toluene xylene methylsulfonylethane gasoline extractive distillation pyrolysis cosolvent.

Highly efficient separation of benzene, toluene, and xylenes (BTXs) from pyrolysis gasoline is very important in petrochem. industries. Though the extractive distillation (ED) process is simpler and consumes less energy compared with liquid-liquid extraction process, it is difficult for a single solvent, for example, sulfolane, to achieve both high purity and high yield of BTXs. In this work, methylsulfonylethane (MSE) was chosen as a cosolvent to improve the selectivity of sulfolane after solvent screening, and factors that may affect the selectivity of the composite solvent were fully investigated, such as the content of cosolvent, solvent to feed ratio, the composition of the feed, and temperature Furthermore, 240 h of continuous extractive distillation and solvent recovery experiment was carried out using sulfolane (85 wt%)-MES (15 wt%) mixture as solvent. The purity of mixed aromatics obtained was 99.83%, and the yield was as high as 99.7%.

Asia-Pacific Journal of Chemical Engineering published new progress about Alkenes Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), PROC (Process). 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Formula: C9H20O5.

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