Tag: M.W=200-250

Yuan, Mengwei published the artcileUltrathin Two-Dimensional Metal-Organic Framework Nanosheets with the Inherent Open Active Sites as Electrocatalysts in Aprotic Li-O2 Batteries, HPLC of Formula: 143-24-8, the main research area is metal organic framework nanosheet electrocatalyst lithium oxygen battery; Li−O2 batteries; electrocatalyst; metal−organic framework; nanosheets.

Ultrathin two-dimensional metal-organic frameworks (2D MOFs) have the potential to improve the performance of Li-O2 batteries with high O2 accessibility, open catalytic active sites, and large surface areas. To obtain highly efficient cathode catalysts for aprotic Li-O2 batteries, a facile ultrasonicated method has been developed to synthesize three kinds of 2D MOFs (2D Co-MOF, Ni-MOF, and Mn-MOF). Contributing from the inherent open active sites of the Mn-O framework, the discharge specific capacity of 9464 mAh g-1 is achieved with the 2D Mn-MOF cathode, higher than those of the 2D Co-MOF and Ni-MOF cathodes. During the cycling test, the 2D Mn-MOF cathode stably operates more than 200 cycles at 100 mA g-1 with a curtailed discharge capacity of 1000 mAh g-1, quite longer than those of others. According to further electrochem. anal., we observe that the 2D Mn-MOF outperforms 2D Ni-MOF and Co-MOF due to a superior oxygen reduction reactions and oxygen evolution reactions activity, in particular, the efficient oxidation of both LiOH and Li2O2. The present study provides new insights that the 2D MOF nanosheets can be well applied as the Li-O2 cells with high energy d. and long cycling life.

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

Wang, Jinquan published the artcileNitrogen-Linked Hexaazatrinaphthylene Polymer as Cathode Material in Lithium-Ion Battery, HPLC of Formula: 143-24-8, the main research area is nitrogen linked hexaazatrinaphthylene polymer cathode material lithium ion battery; batteries; cathodes; conductivity; energy storage; organic polymers.

Nitrogen-linked hexaazatrinaphthylene polymer (N2-HATN) as organic cathode material with low HOMO-LOMO gap was synthesized and was observed to possess reversible high capacity and unexpected long-term cycling stability. The pre-treated N2-HATN and pRGO combination demonstrated good structure compatibility and the resultant cathode exhibited a constant increment of capacity during the redox cycles. The initial capacity at 0.05 A g-1 was 406 mA h-1 g-1, and increased to 630 mA h-1 g-1 after 70 cycles. At 0.5 A g-1 discharging rate, the capacity increased from an initial value of 186 mA h-1 g-1 to 588 mA h-1 g-1 after 1600 cycles. The pseudocapacitance-type behavior is postulated to be attributed to the structure compatibility between the active material and pRGO.

Chemistry – A European Journal published new progress about Battery cathodes. 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

Son, Seoung-Bum published the artcileSystematic study of the cathode compositional dependency of cross-talk behavior in Li-Ion battery, HPLC of Formula: 23783-42-8, the main research area is lithium ion battery cathode oxide electrolyte.

While LiNixMnyCo1 – x – yO2 (NMC) is one of the most widely used cathode materials for lithium-ion batteries (LIBs), the composition of NMC is evolving to Ni-rich NMC to achieve higher lithium capacity that fulfills the constant demand for LIBs with ever-higher energy densities. The change in the composition of NMC affects electrochem. features and electrode cross-talk, which explains the performance change during cycling. In this study, we introduce various NMC materials (LiNi0.5Mn0.3Co0.2O2, LiNi0.6Mn0.2Co0.2O2 and LiNi0.8Mn0.1Co0.1O2) to reveal how the NMC composition affects electrode cross-talk. The study reveals that NMC composition strongly affects transition metal dissolution; dissolution of manganese linearly decreases as its stoichiometric ratio in NMC decreases, while dissolution of nickel is only prominent in LiNi0.8Mn0.1Co0.1O2. Aged electrolyte samples are characterized with high-performance liquid chromatog., and two electrolyte decomposition species, C8H16O5 and C9H18O5, are identified across all samples.

Journal of the Electrochemical Society published new progress about Battery cathodes. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, HPLC of Formula: 23783-42-8.

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

Li, Xingyu published the artcileNickel oxide nanoparticles decorated highly conductive Ti3C2 MXene as cathode catalyst for rechargeable Li-O2 battery, COA of Formula: C10H22O5, the main research area is nickel oxide nanoparticle titanium carbide cathode lithium battery rechargeable.

With a remarkably high theor. energy storage capacity, a rechargeable lithium oxygen battery has attracted enormous attention. However, inert kinetics of oxygen evolution reaction and oxygen reduction reaction process generate low round-trip efficiency and poor cyclability. NiO materials are recognized as efficient and low-cost catalysts for Li-O2 battery. Here, we report a controllable approach to synthesize metal oxide decorated highly conductive Ti3C2 composite as cathode catalyst for rechargeable Li-O2 battery. In this composite, multi-layered Ti3C2 MXene enacts a superior host to load NiO nanoparticles on account of the open layered structure, the good electronic conductivity and the excellent chem. stability. Serving as Li-O2 battery cathode catalyst, NiO/Ti3C2 nanomaterials deliver a high initial capacity of 13350 mAh g-1 and good cycling performance of over 90 rounds at a c.d. of 100 mA g-1 and 500 mA g-1, resp. Such properties of the prepared composite are attributed to the excellent conductivity of MXene and the high catalytic activity of NiO. As far as we know, this is the prior report that MXenes based materials are made into Li-O2 battery cathodes catalyst and proved to have a potential application in cathode materials of Li-O2 battery.

Journal of Alloys and Compounds published new progress about Battery cathodes. 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

Yilmaz, Melike Sevim published the artcileSilica Coated ZnFe2O4 Nanoparticles as Cathode Catalysts for Rechargeable Lithium-Air Batteries, Application In Synthesis of 143-24-8, the main research area is silica zinc ferrite nanoparticle cathode catalyst lithium air battery.

In this work, the preparation and structural characterization of a novel material consisting of silica-coated zinc ferrite (ZnFe2O4) nanoparticles as cathode catalysts for nonaqueous lithium-air batteries (LABs) are presented for the first time. ZnFe2O4 nanoparticles (NPs) were prepared by the normal micelles method, using oleic acid as the capping agent and then coating them with silica, via a reverse microemulsion method, with various thicknesses. The colloidal ZnFe2O4 NPs and silica-coated ZnFe2O4 NPs were characterized by TEM and powder XRD. The particle size of bare ZnFe2O4 NPs was calculated to be 5.8 nm by both TEM image and XRD pattern. They were then coated by silica with layer thicknesses of 9, 11, and 13 nm. The performances of bare and silica-coated ZnFe2O4 NPs were evaluated as cathode catalysts for LABs using 1 M lithium trifluoromethanesulfonate (TFMS) in tetraethylene glycol di-Me ether (TEGDME) as the electrolyte. The primary discharge/charge capacities of bare ZnFe2O4 NPs and ZnFe2O4 NPs with silica-shell thicknesses of 9, 11, and 13 at 0.1 mA cm-2 were found to be 3300, 4300, 6200 and 5000 mAh g-1, resp. The overpotential is almost 0.5 V, decreased by silica coating with a thickness of 11 nm, whereas there was no difference at other thicknesses. Cyclability with a discharge capacity of 1000 mAh g-1 was observed for at least 45 cycles for silica-coated ZnFe2O4 NPs with a shell thickness of 11 nm.

Batteries & Supercaps published new progress about Battery cathodes. 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

Li, Jinli published the artcileDrawing a Pencil-Trace Cathode for a High-Performance Polymer-Based Li-CO2 Battery with Redox Mediator, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium carbon dioxide battery cathode redox mediator.

Lithium-carbon dioxide (Li-CO2) batteries have received wide attention due to their high theor. energy d. and CO2 capture capability. However, this system still faces poor cycling performance and huge overpotential, which stems from the leakage/volatilization of liquid electrolyte and instability of the cathode. A gel polymer electrolyte (GPE)-based Li-CO2 battery by using a novel pencil-trace cathode and 0.0025 mol L-1 (M) binuclear cobalt phthalocyanine (Bi-CoPc)-containing GPE (Bi-CoPc-GPE) is developed here. The cathode, which is prepared by pencil drawing on carbon paper, is stable because of its typical limited-layered graphitic structure without any binder. In addition, Bi-CoPc-GPE, which consists of polymer matrix filled with liquid electrolyte, exhibits excellent ion conductivity (0.86 mS cm-1), effective protection for Li anode, and superior leakproof property. Moreover, Bi-CoPc acts as a redox mediator to promote the decomposition of discharge products at low charge potential. Interestingly, different from polymer-shaped discharge products formed in liquid electrolyte-based Li-CO2 batteries, the morphol. of products in Li-CO2 batteries using Bi-CoPc-GPE is film-like. Hence, this polymer-based Li-CO2 battery shows super-high discharge capacity, low overpotential, and even steadily runs for 120 cycles. This study may pave a new way to develop high-performance Li-CO2 batteries.

Advanced Functional Materials published new progress about Battery cathodes. 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

Haramiishi, Yoshiaki published the artcileViscoelastic evaluation of poly(trimethylene carbonate)s bearing oligoethylene glycol units which show thermoresponsive properties at body temperature, Computed Properties of 23783-42-8, the main research area is viscoelasticity polytrimethylene carbonate oligoethylene glycol thermoresponsive body temperature.

Poly(trimethylene carbonate) (PTMC) derivatives have been extensively researched for use as low-toxicity biomaterials. Better biocompatibility and lower toxicity have been achieved by eliminating acid generation from the ester group at the side chains. In this study, thermosensitive PTMC derivatives bearing oligo(ethylene glycol) units are synthesized by ring-opening polymerization for the development of low-toxicity and thermosensitive soft materials. The viscoelastic properties of the obtained polymers are then investigated by rheometry to clarify the thermosensitive and mol. weight effects. Furthermore, thermosensitive behaviors and dynamics of these polymers are observed by UV-vis transmittance, DSC, and 1H NMR spectra anal. These data suggest a mechanism for the thermosensitive behavior where it is surmised that some kind of dehydration phenomenon induces aggregation behavior in aqueous media above lower critical solution temperature These thermosensitive behaviors provide an important road map for the development of thermosensitive soft materials using ester-free PTMC derivatives by controlling the thermosensitive behaviors and bulk properties.

Macromolecular Chemistry and Physics published new progress about Body temperature. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Computed Properties of 23783-42-8.

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

Kwak, Won-Jin published the artcileOxidation Stability of Organic Redox Mediators as Mobile Catalysts in Lithium-Oxygen Batteries, Category: ethers-buliding-blocks, the main research area is organic redox mediator catalyst lithium oxygen battery.

Employing organic redox mediators (ORMs) for lithium-oxygen (Li-O2) batteries has emerged as an important strategy to suppress charging overpotentials. Judicious mol. designs of ORMs can also tailor their redox potential and electron-transfer rate to optimize the catalytic efficiency. However, the stability of ORMs in Li-O2 cells was scarcely studied. Here, the catalytic efficiency and stability of several important ORMs are assessed through in situ gas anal. and reactivity tests with singlet oxygen. Some well-known ORMs are detrimentally decomposed during the first cycle in Li-O2 cells, whereas nitroxyl-radical-based ORMs bear the most stable and efficient response. Analogous nitroxyl-radical derivatives further increase round-trip energy efficiency and electron-transfer kinetics. This study underlines chem. stability aspects of ORMs, which are mandatory for the long-term cyclability in Li-O2 cells. We emphasize that besides the importance of ORMs in these systems and their proper selection, an effective operation of Li-O2 cells depends also strongly on the stability of the carbonaceous cathodes and the electrolyte solutions The stability of all the components in these systems is inter-related.

ACS Energy Letters published new progress about Carbon nanotubes. 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

Sano, Yuki published the artcileControlled radical depolymerization of chlorine-capped PMMA via reversible activation of the terminal group by ruthenium catalyst, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is chlorine capped PMMA controlled radical depolymerization ruthenium catalyst.

This paper deals with a preliminary study in controlled radical depolymerization, that is a unimodal polymer is converted into monomer while maintaining the narrow mol. weight distribution. Thus, our effort has been directed to unzipping-type depolymerization triggered by the reversible activation of the terminal group. An indenyl-based ruthenium catalyst afforded depolymerization of a chlorine-capped poly(Me methacrylate) (PMMA-Cl) at relatively high temperature (>100 °C). Interestingly, the SEC curve shifted to lower mol. weight as the time proceeds, and the monomer, that is MMA, definitely generated and the amount almost corresponded to the decrease in mol. weight The depolymerization was eventually saturated due to the equilibrium monomer concentration, but evaporation of the generating monomer followed by an addition of solvent and re-heating allowed further progress of depolymerization We have thus demonstrated four consecutive depolymerizations via the evaporation methodol. resulting in the unimodal SEC curve shift to lower mol. weight

European Polymer Journal published new progress about Depolymerization. 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

Saito, Satoshi published the artcileHigh performance electric double layer transistors using solvate ionic liquids, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is elec double layer transistorsolvate ionic liquid.

We report electrochem. properties of a Li+-based solvate ionic liquid (SIL) and its application to gate dielecs. for elec. double layer transistors (EDLTs). It is found that the elec. double layer capacitance of the SIL increases with strengthening the neg. polarization of the working electrode due to the possible desolvation of the cations in the SIL. The transfer characteristics of a SrTiO3-based EDLT show a dramatic improvement when the SIL is used for the gate dielec. The present result proposes a guideline to high performance gate dielecs. for EDLTs, leading to the development of iontoronics research with semiconductor devices.

Japanese Journal of Applied Physics published new progress about Dielectric films. 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