Tag: M.W=200-250

Cheng, Eric Jianfeng published the artcileEffects of porosity and ionic liquid impregnation on ionic conductivity of garnet-based flexible sheet electrolytes, Computed Properties of 143-24-8, the main research area is porosity ionic liquid impregnation conductivity garnet flexible sheet electrolyte; aluminum doped lithium lanthanum zirconium oxide battery solid electrolyte.

Although the garnet-type ceramic ionic conductor, Li7La3Zr2O12 (LLZO), shows relatively high chem. stability against Li metal and has the potential to replace flammable liquid electrolytes for Li metal batteries, the large interfacial resistance between LLZO and electrodes challenges its practical application. A possible solution is to produce a quasi-solid-state LLZO-based flexible sheet electrolyte. Here we prepared an Al-doped LLZO-based flexible sheet electrolyte and studied its ionic conductivity as functions of porosity and ionic liquid (IL) impregnation. Possible Li+ ion conducting pathways through the quasi-solid-state composite sheet electrolyte were discussed and its electrochem. performance was also evaluated.

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

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

Lee, Dawoon published the artcileMulti-Foldable and Environmentally-Stable All-Solid-State Supercapacitor Based on Hierarchical Nano-Canyon Structured Ionic-Gel Polymer Electrolyte, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is ionic gel polymer electrolyte solid state supercapacitor.

New ionic-gel polymer electrolytes (IGPEs) are designed for use as electrolytes for all-solid-state supercapacitors (ASSSs) with excellent deformability and stability. The combination of the photochem. reaction-based polymer matrix, weak-binding lithium salt with ionic liquid, and ion dissociating solvator is employed to construct the nano-canyon structured IGPE with high ionic conductivity (σDC = 1.2 mS cm-1 at 25°C), high dielec. constant (εs = 131), and even high mech. robustness (bending deformation for 10 000 cycles with superior conductivity retention [≈91%]). This gives rise to ASSS with high compatibility and stability, which is compliant with foldable electronics. Consequently, this ASSS delivers remarkable electrochem. performance (specific capacitance of ≈105 F g-1 at 0.22 A g-1, maximum energy d. and power d. of 23 and 17.2 kW kg-1), long lifetime (≈93% retention after 30 days), wider operating temperature (≈0-120°C), and mech. stabilities with no significant capacitance reduction after mech. bending and multiple folding, confirming the superior electrochem. durability under serious deformation states. Therefore, this ultra-flexible and environmentally stable ASSS based on the IGPE having the nano-canyon morphol. can be a novel approach for powering up the ultra-deformable and durable next-generation wearable energy storage devices.

Advanced Functional Materials published new progress about Activation energy. 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

Bhatt, Pinakin J. published the artcileEffect of Different Cations on Ion-Transport Behavior in Polymer Gel Electrolytes Intended for Application in Flexible Electrochemical Devices, Name: 2,5,8,11,14-Pentaoxapentadecane, the main research area is tetraethylene glycol dimethyl ether polymer gel electrolyte electrochem device.

This paper reports the effect of different cations (Na, Mg and Li) while keeping perchlorate as the common anion on ion-dynamics behavior within polymer gel electrolytes containing tetraethylene glycol di-Me ether (TEGDME) solvent and poly(vinylidene fluoride-hexafluoropropylene) (PVdF-HFP) as the polymer host. FTIR investigations demonstrate significant changes in characteristic bands, while XRD observations indicate prominent structural variation in terms of merger/suppression of phases when NaClO4, Mg(ClO4)2 and LiClO4 salts are immobilized in the PVdF-HFP/TEGDME matrix. The highest room temperature ionic conductivity of 1.2 x 10-3 S cm-1 with high dielec. constant value has been obtained for the Li+ conducting electrolyte composition due to its superior electrochem. and ion-conduction behavior as compared to its Na+ and Mg2+ counterparts. In the low-frequency region, modulus curves reveal polarizing effects with long-range mobility/migration of Na/Mg/Li ions, while in the high-frequency region, a peak onset relating the translational ion dynamics and conductivity relaxation is observed The reported polymer gel electrolytes may be employed as electronic materials for developing next-generation flexible electrochem. devices.

Journal of Electronic Materials published new progress about Activation energy. 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

He, Xin published the artcileInsights into the Ionic Conduction Mechanism of Quasi-Solid Polymer Electrolytes through Multispectral Characterization, Computed Properties of 143-24-8, the main research area is quasi solid polymer electrolyte ionic conduction mechanism multispectral characterization; ion transport mechanism; polyvinylidene fluoride-hexafluoropropylene; quasi-solid polymer electrolyte; spectroscopic characterization.

Quasi-solid polymer electrolytes (QPE) composed of Li salts, polymer matrix, and solvent, are beneficial for improving the security and energy d. of batteries. However, the ionic conduction mechanism, existential form of solvent mols., and interactions between different components of QPE remain unclear. Here we develop a multispectral characterization strategy combined with first-principles calculations to unravel aforesaid mysteries. The results indicate that the existential state of solvent in QPE is quite different from that in liquid electrolyte. The Li cations in gel polymer electrolyte are fully solvated by partial solvent mols. to form a local high concentration of Li+, while the other solvent mols. are fastened by polymer matrix in QPE. As a result, the solvation structure and conduction mechanism of Li+ are similar to those in high-concentrated liquid electrolyte. This work provides a new insight into the ionic conduction mechanism of QPE and will promote its application for safe and high-energy batteries.

Angewandte Chemie, International Edition published new progress about Activation energy. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Computed Properties of 143-24-8.

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

Han, Fengfeng published the artcileV2CTX catalyzes polysulfide conversion to enhance the redox kinetics of Li-S batteries, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is vanadium carbide polysulfide conversion redox kinetics lithium sulfur battery.

Lithium-sulfur (Li-S) batteries have the potential to become the future energy storage system, yet they are plagued by sluggish redox kinetics. Therefore, enhancing the redox kinetics of polysulfides is key for the development of high-energy d. and long-life Li-S batteries. Herein, a Ketjen Black (KB)/V2CTX modified separator (KB/V2CTX-PP) based on the catalytic effect in continuous solid-to-liquid-to-solid reactions is proposed to accelerate the conversion of sulfur species during the charge/discharge process in which the V2CTX can enhance the redox kinetics and inhibit polysulfide shuttling. The cells assembled with KB/V2CTX-PP achieve a gratifying first discharge capacity of 1236.1 mA h g-1 at 0.2C and the average capacity decay per cycle reaches 0.049% within 1000 cycles at 1C. The work provides an efficient idea to accelerate redox conversion and suppress shuttle effects by designing a multifunctional catalytic separator.

Dalton Transactions published new progress about Activation energy. 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

Alzate-Carvajal, Natalia published the artcileA comparative study on the influence of the polymeric host for the operation of all-solid-state batteries at different temperatures, COA of Formula: C10H22O5, the main research area is polymer electrolyte solid state battery temperature.

Solid Polymer Electrolytes (SPE) are critical components to develop safe, high energy d. all solid-state lithium metal batteries (ASSB), providing favorable mech. properties and good stability vs Li-metal. Typically used poly(ethylene oxide) (PEO) based electrolytes do not allow cycling of all solid-state cells at room temperature due to the crystallization of PEO hindering the ionic transport. Increasing the ionic conductivity of SPE at lower temperature is then mandatory. This study addresses the challenge thanks to the use of Polymerized ionic liquid (PIL), poly(diallyldimethylammonium) bis(trifluoromethanesulfonyl)imide (PDADMAT) as polymeric host for producing SPE. Mixtures of PDADMAT and PEO with tetraglyme Li salt IL, LiG4TFSI, are prepared and their electrochem. properties in lithium metal batteries investigated. Through composition optimization, membranes containing 66 wt % of LiG4TFSI were selected as the best compromise in term of conduction properties (above 10-4 S/cm at room temperature), transference number of ca. 0.4 and mech. behavior. All-solid-state cells prepared using PDADMAT-based membranes were able to cycle at 60 °C and room temperature up to 0.425 mA/cm2 current densities whereas POE-based cells could only sustain 60 °C cycling. The study underlines the benefit of using IL and PIL as components of SPE for the operation of high performance ASSB at room temperature

Journal of Power Sources published new progress about Activation energy. 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

Drvaric Talian, Sara published the artcileImpedance response of porous carbon cathodes in polysulfide redox system, Formula: C10H22O5, the main research area is impedance porous carbon cathode polysulfide redox.

The transport-reaction mechanism taking place in porous cathodes used in Li-S battery cells is systematically studied using impedance spectroscopy. The adverse effects of metallic Li are excluded by using sym. C-C cells. The results obtained on two types of porous electrodes, a C felt and a conventional mesoporous C electrode, are compared to those previously obtained on a flat glassy C electrode. The thickness of both porous electrodes as well as the thickness of porous separator are varied and impedance spectra studied. The shapes, magnitudes and trends of various impedance features could well be reproduced by a proposed transmission line model. The model is upgraded with respect to known transmission line models in two ways: diffusion in pores of electrode is taken into account and a coupling of this diffusion to diffusion in separator is carried out. The results consistently show that the migration, reaction and diffusion impedances due to processes taking place inside a typical cathode are one to two orders of magnitude smaller than the impedance due to diffusion of active species in the porous separator. However, the present findings strongly indicate that if one could suppress the leakage of polysulfides into the separator, the total impedance would drop dramatically, regardless of the actual thickness or porosity of the cathode.

Electrochimica Acta published new progress about Diffusion (in pores). 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

Schaffarczyk McHale, Karin S. published the artcileUnderstanding the effects of solvate ionic liquids as solvents on substitution processes, SDS of cas: 143-24-8, the main research area is solvate ionic liquid solvent nucleophilic substitution reaction kinetics; aromatic substitution reaction kinetics nucleophilic solvent solvate ionic liquid.

The effects of solvate ionic liquids as solvents have been considered for two substitution processes where the solvent effects of typical ionic liquids have been extensively investigated previously; the bimol. nucleophilic substitution (SN2) reaction between pyridine and benzyl bromide and the nucleophilic aromatic substitution (SNAr) reaction between ethanol and 1-fluoro-2,4-dinitrobenzene. It was found that use of solvate ionic liquids gave rise to similar trends in the activation parameters for both substitution processes as typical ionic liquids, implying the microscopic interactions responsible for the effects were the same. However, different effects on the rate constants compared to typical ionic liquids were observed due to the changes in the balance of enthalpic and entropic contributions to the observed rate constants From these data it is clear that the reaction outcome for both of these substitution reactions fall within the ‘predictive framework’ established in previous studies with a cautionary tale or two of their own to add to the general knowledge of ionic liquid solvent effects for these processes, particularly with respect to potential reactivity of the solvate ionic liquids themselves.

Organic & Biomolecular Chemistry published new progress about Activation enthalpy. 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

Hosoya, Takashi published the artcileAlkaline aerobic oxidation of native softwood lignin in the presence of Na+-cyclic polyether complexes, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is softwood lignin sodium cyclic polyether complex aerobic oxidation.

Alk. aerobic oxidation is a promising way to convert lignin to low mol. weight phenols, especially 4-hydroxybenzaldehydes. Our previous studies reported that oxidation of softwood lignin samples with a bulky cation, Bu4N+, facilitates selective production of vanillin (4-hydroxy-3-methoxybenzaldehyde). This study presents vanillin production from native softwood lignin in Japanese cedar (Cryptomeria japonica) in NaOH aqueous in the presence of cyclic polyethers, with our expectation that Na+-polyether complexes exhibit effects similar to those of Bu4N+. Oxidation of wood flour (10 mg) in 4.0 M NaOH aqueous (2.0 mL) at 120°C under air gave vanillin with 6.2 weight% lignin-based yield, which was raised to 15.2 weight% by the addition of 15-crown-5 (1,4,7,10,13-pentaoxacyclopentadecane). On the other hand, such effect was not observed with the addition of tetraethylene glycol di-Me ether, a non-cyclic analog of 15-crown-5. Mechanistic study with a lignin model compound revealed that stabilization of a vanillin precursor by the complex cation was a reason for the increased vanillin yield exhibited by the crown ether. This is similar to the influence of Bu4N+ reported previously, suggesting effective control of aerobic oxidation by large size cationic species.

Journal of Wood Chemistry and Technology published new progress about Cannizzaro reaction. 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

Hashimoto, Kei published the artcileSolvation Structure of Poly(benzyl methacrylate) in a Solvate Ionic Liquid: Preferential Solvation of Li-Glyme Complex Cation, HPLC of Formula: 143-24-8, the main research area is solvation polybenzyl methacrylate lithium glyme based ionic liquid MD; x ray scattering solvation polybenzylmethacrylate lithium glyme ionic liquid.

We report the solvation structure of a lower critical solution temperature (LCST)-type thermoresponsive polymer in a solvate ionic liquid (SIL, i.e., an ionic liquid comprising solvate ions) to elucidate the predominant interaction for the dissolution of the thermoresponsive polymer in SIL at low temperatures The solvation structure of poly(benzyl methacrylate) (PBnMA) and a model compound of its monomer in a typical glyme-based SIL, [Li(G4)][TFSA] (G4: tetraglyme; TFSA: bis(trifluoromethanesulfonyl)amide), have been investigated using high-energy X-ray total scattering and all-atom mol. dynamics simulations. In the model compound/SIL system, the intermol. components extracted from the total G(r)s revealed that the ester moiety of BnMA is preferentially solvated by Li cations through a cation-dipole interaction, which induces slight desolvation of the G4 mols., and the aromatic ring of BnMA is secondarily solvated by the [Li(G4)] cation complex through a cation-π interaction with maintaining the complex structure. In contrast, TFSA anions are attracted only by the [Li(G4)] cation. These interactions result in the formation of a solvation layer of SILs around the aromatic ring, which plays a key role in the neg. entropy and enthalpy of mixing. Meanwhile, in the polymer solution, the coordination number of the Li cation around the ester moiety significantly decreased. This could be ascribed to the steric effect of the bulky side chains, preventing the approach of the [Li(G4)] cation complex to the ester moiety located near the main chain. These solvation structures lead to small absolute values of neg. entropy and enthalpy of mixing, which together are key factors to understand the LCST-type phase behavior in the IL system.

Journal of Physical Chemistry B published new progress about Coordination number. 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