Tag: M.W=200-250

Nishioka, Kiho published the artcileN,N-Dimethylethanesulfonamide as an Electrolyte Solvent Stable for the Positive Electrode Reaction of Aprotic Li-O2 Batteries, Computed Properties of 143-24-8, the main research area is dimethylethanesulfonamide electrolyte solvent pos electrode lithium oxygen battery.

The realization of secondary lithium-oxygen batteries (Li-O2 batteries, LOBs) with large gravimetric energy d. requires the development of an innovative electrolyte with high chem. stability that allows the charge-discharge reaction to proceed with low overvoltage. In this study, we evaluated the potential of an electrolyte solvent, N,N-dimethylethanesulfonamide (DMESA) with a sulfonamide functional group, at a c.d. of 0.4 mA cm-2 and a capacity of 4 mA h cm-2. The voltage at which CO2 was generated during charging was substantially higher than that of a tetraglyme (G4)-based electrolyte with redox mediators, which is one of the standard electrolytes used for LOBs. Experiments using a 13C-containing pos. electrode revealed that CO2 generated during charging mainly originated from the decomposition of the pos. electrode. The analyses of the charging profile in conjunction with differential electrochem. mass spectrometry suggested the formation of highly degradable lithium peroxide (Li2O2) in the DMESA-based electrolyte. The formation of highly degradable Li2O2 enables a reduction of the charging voltage, leading to further suppression of the electrolyte decomposition

ACS Applied Energy Materials published new progress about Battery anodes. 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

Zhu, Mingjun published the artcileDirect Observation of Solvent Donor Number Effect on Lithium-Oxygen Battery Capacity via a Nanoarray Cathode Model, SDS of cas: 143-24-8, the main research area is binary solvent effect lithium oxygen battery nanoarray cathode capacity.

The solvent properties are critical factors that strongly influence the capacities and cycle lives of lithium-oxygen (Li-O2) batteries. In previous studies of solvent effects, disk electrodes are prototypes far from practical application while practical composite electrodes are interfered by additives. Herein, we propose MnO2 nanoarrays as a cathode model to directly observe the effect of the tunable donicity of DMSO (DMSO)-tetra (ethylene glycol) di-Me ether (G4) binary solvent. The facilely prepared MnO2 nanoarrays on carbon clothes not only mimic carbon-supported catalysts but also provide an open architecture that helps distinguish discharge products from complex electrodes without further characterizations. Using nanoarray models, this work directly observes the morphologies of discharge products that gradually evolve from conformal films to toroid-like particles with the increase in the DMSO ratio in the binary solvents. Thus, the Li-O2 battery capacities are proportional to the donicities of the binary solvents. However, the reactive solvent that provides high donicity greatly deteriorates the cycle performance. A compromise should be achieved between capacity and stability when tuning the donicity of the binary solvent. The novel nanoarray model and fundamental findings in this work will further help the electrolyte optimization for Li-O2 batteries.

Journal of Physical Chemistry C published new progress about Battery anodes. 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

Ito, Kimihiko published the artcileOperando Br K-Edge Dispersive X-ray Absorption Fine Structure Analysis for Br-/Br3- Redox Mediator for Li-Air Batteries, Application In Synthesis of 143-24-8, the main research area is dispersive X ray absorption structure analysis bromine redox mediator; bromine redox mediator lithium air secondary battery capacity.

The behavior of Br-/Br3- redox mediator (RM), which has been shown to suppress charging overpotential in lithium-air batteries, has been detected for the first time using operando Br K-edge dispersive X-ray absorption fine structure. Br3- ions in the electrolyte increase monotonically after ∼ 30% charging, which indicates that a part of Br3- formed via the oxidation of Br- during charging does not oxidize Li2O2 as RM but gets accumulated in the cell. The accumulated Br3- is estimated at ∼ 20% of the total amount of charging. Consistent with this result, the O2 evolution efficiency gradually decreases from the initial 100% as the charging progresses, and CO2 is emitted at the end of the charging. The integrated amount of O2 evolution during charging accounts for ∼ 83% of the theor. two-electron reaction. All these results clearly show that the Br-/Br3- RM functions effectively at the beginning of charging but gradually loses its function as charging proceeds.

ACS Energy Letters published new progress about Battery anodes. 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

Singh, Rajkumar published the artcileIon-transport behavior in tetraethylene glycol dimethyl ether incorporated sodium ion conducting polymer gel electrolyte membranes intended for sodium battery application, Application In Synthesis of 143-24-8, the main research area is tetraethylene glycol dimethyl ether polymer gel electrolyte membrane battery.

In this paper, ion-transport behavior in poly(Me methacrylate) based sodium-ion conducting polymer gel electrolyte membranes containing sodium triflate salt dissolved in tetraethylene glycol di-Me ether (TEGDME) mol. liquid has been investigated by electrochem. impedance spectroscopy and other electrochem. ion-transport studies. The optimized polymer gel electrolyte membrane with 40 wt% TEGDME concentration offers a RT ionic conductivity of 3.6 x 10-3 S cm-1. The ion-transport behavior has been probed in wide range of frequency with the help of conductivity, dielec. and modulus studies. The structural studies reveal that the optimized electrolyte offers a porous structure with very low average roughness height of ∼10μm. The optimized flexible electrolyte membrane with an electrochem. stability window of ∼4.4 V and sodium ion transport number close to 0.37 remains stable in the gel phase up to 150°C. A proto-type RT Na-S battery utilizing the optimized electrolyte membrane display a stable open circuit potential of 2.24 V and delivers first discharge capacity as ∼677 mA h g-1.

Journal of Molecular Liquids published new progress about Battery anodes. 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

Lee, Pui Lap Jacob published the artcileEtched ion-track membranes as tailored separators in Li-S batteries, Application In Synthesis of 143-24-8, the main research area is lithium sulfur ion track membrane battery separator; PET; battery separator; etched ion track membrane; lithium–sulfur battery; polyethylene terephthalate; polysulfide redox shuttle.

Lithium-sulfur (Li-S) batteries are considered a promising next generation alternative to lithium-ion batteries for energy storage systems due to its high energy d. However, several challenges, such as the polysulfide redox shuttle causing self-discharge of the battery, remain unresolved. In this paper, we explore the use of polymer etched ion-track membranes as separators in Li-S batteries to mitigate the redox shuttle effect. Compared to com. separators, their unique advantages lie in their very narrow pore size distribution, and the possibility to tailor and optimize the d., geometry, and diameter of the nanopores in an independent manner. Various polyethylene terephthalate membranes with diameters between 22 and 198 nm and different porosities were successfully integrated into Li-S coin cells. The reported coulombic efficiency of up to 97% with minor reduction in capacity opens a pathway to potentially address the polysulfide redox shuttle in Li-S batteries using tailored membranes.

Nanotechnology published new progress about Battery anodes. 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

Wan, Hao published the artcileA Friendly Soluble Protic Additive Enabling High Discharge Capability and Stabilizing Li Metal Anodes in Li-O2 Batteries, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is soluble protic electrolyte additive lithium oxygen battery anode.

Promoting the solution phase formation of Li2O2 rather than on the cathode surface is a key issue for high-performance Li-O2 batteries. Protic additives have been reported to guide the discharge of Li2O2 in the electrolyte solution, while further advances are stalled by the intrinsical reactivity to Li metal to deteriorate the lifespan of Li-O2 batteries. Herein, rhodamine B (RhB), a protic additive, is first introduced into electrolyte as a phase-transfer catalyst to achieve solution phase formation of Li2O2. The yield of Li2O2 is 90.79%, and the discharge capacity is 46 000 mAh gcarbon-1 at c.d. of 1000 mA gcarbon-1, which is 23-fold higher than that of blank electrolyte. D. functional theory calculations further demonstrate the feasibility of RhB to boost solution phase discharge. Most notably, the free chlorine ion in RhB assists the in situ formation of a stable Li+-conducting solid electrolyte interphase to protect Li anode from corrosion and dendrite formation during cycling. As a result, Li||Li sym. cells exhibit a long cycle performance up to 1300 h at 1 mA cm-2 with low hysteresis voltage. Benefiting from the above results, Li-O2 batteries with RhB present long cycle stability.

Advanced Functional Materials published new progress about Battery anodes. 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

Lim, Hyung-Seok published the artcileStable Solid Electrolyte Interphase Layer Formed by Electrochemical Pretreatment of Gel Polymer Coating on Li Metal Anode for Lithium-Oxygen Batteries, Product Details of C10H22O5, the main research area is solid electrolyte interphase layer gel polymer coating lithium battery.

Lithium-oxygen (Li-O2) batteries exhibit the highest theor. specific energy d. among candidates for next-generation energy storage systems, but the instabilities of Li metal anode (LMA), air electrode, and electrolyte largely limit the practical applications of these batteries. Herein, we report an effective method to protect the LMA against side reactions between the LMA and the crossover contaminants such as highly reactive oxygen moieties. A solid electrolyte interphase (SEI) layer rich in inorganic components is formed on the LMA coated with poly(ethylene oxide) thin film through an in situ electrochem. precharging step under oxygen atm. This uniformly distributed SEI layer interacts with the flexible polymer matrix and forms a submicrometer-sized gel-like polymer layer. This polymer-supported SEI layer leads to much longer cycle life (130 vs 65 cycles) as compared to that of pristine cells under the same testing conditions. It is also very effective to stabilize the LMA/electrolyte interphase with a redox mediator.

ACS Energy Letters published new progress about Battery anodes. 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

Sadd, Matthew published the artcilePolysulfide Speciation and Migration in Catholyte Lithium-Sulfur Cells, Name: 2,5,8,11,14-Pentaoxapentadecane, the main research area is polysulfide speciation migration lithium sulfur battery catholyte; catholyte; lithium−sulfur (Li−S) battery; operando Raman spectroscopy; polysulfides; radical species.

Semi-liquid catholyte Lithium-Sulfur (Li-S) cells have shown to be a promising path to realize high energy d. energy storage devices. In general, Li-S cells rely on the conversion of elemental sulfur to soluble polysulfide species. In the case of catholyte cells, the active material is added through polysulfide species dissolved in the electrolyte. Herein, we use operando Raman spectroscopy to track the speciation and migration of polysulfides in the catholyte to shed light on the processes taking place. Combined with ex-situ surface and electrochem. anal. we show that the migration of polysulfides is central in order to maximize the performance in terms of capacity (active material utilization) as well as interphase stability on the Li-metal anode during cycling. More specifically we show that using a catholyte where the polysulfides have the dual roles of active material and conducting species, e. g. no traditional Li-salt (such as LiTFSI) is present, results in a higher mobility and faster migration of polysulfides. We also reveal how the formation of long chain polysulfides in the catholyte is delayed during charge as a result of rapid formation and migration of shorter chain species, beneficial for reaching higher capacities. However, the depletion of ionic species during the last stage of charge, due to the conversion to and precipitation of elemental sulfur on the cathode support, results in polarization of the cell before full conversion can be achieved.

ChemPhysChem published new progress about Battery anodes. 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

Jonsson, Erlendur published the artcileOn the solvation of redox mediators and implications for their reactivity in Li-air batteries, Related Products of ethers-buliding-blocks, the main research area is triethylphosphine oxide tetraglyme solvation lithium air battery.

Lithium-air batteries are a promising energy storage technol. for transport applications, given their exceptionally high energy d. However, their development is significantly hampered by high overpotentials, which lead to poor efficiency and short lifetimes. Redox mediators provide a solution to this problem by shuttling electrons from the electrode to the active species at just above the redox potential of the mediator. Thus, knowing the redox potential and having the ability to tune it are critical to electrochem. performance. We focus on LiI as a model mediator-given its addnl. role in controlling LiOH vs Li2O2 chem.-and use cyclic voltammetry (CV), NMR, UV/Vis spectrometry, and mol. dynamics (MD) simulations to monitor the effects of electrolyte composition on solvation. Li+ and I- solvation in common Li-air solvents, the electrochem. implications, and the applicability of each technique to probe the nature of the solvation shell and its effect on the electrochem. properties are explored. Starting with a simple thermodn. model, we then used UV/Vis spectrometry to probe I- solvation, 1H NMR spectroscopy to study water solvation and 31P of the probe mol. triethylphosphine oxide (TEPO) to explore Li+ solvation; we find that no single descriptor can provide an accurate description of the solvation environment. Instead, we use all these methods in combination with the MD results to help rationalize the CV data. We find that the I- solvation improves significantly in tetraglyme (G4), with increasing salt and water concentration, but minimal effects on changing salt/water concentrations are seen in DMSO. In contrast, increasing salt concentration increases the Li+ activity in DMSO but not in G4. Furthermore, a simple model considering the equilibrium between the different species was used to explain the 1H NMR data.

Journal of the Electrochemical Society published new progress about Battery anodes. 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

Huang, Zhimei published the artcileA 1,3-Dimethyl-2-imidazolidinone: an ideal electrolyte solvent for high-performance Li-O2 battery with pretreated Li anode, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is dimethylimidazolidinone battery anode electrolyte ionic conductivity.

Electrolytes are widely considered as a key component in Li-O2 batteries (LOBs) because they greatly affect the discharge-charge reaction kinetics and reversibility. Herein, we report that 1,3-dimethyl-2-imidazolidinone (DMI) is an excellent electrolyte solvent for LOBs. Comparing with conventional ether and sulfone based electrolytes, it has higher Li2O2 and Li2CO3 solubility, which on the one hand depresses cathode passivation during discharge, and on the other hand promotes the liquid-phase redox shuttling during charge, and consequently lowers the overpotential and improves the cyclability of the battery. However, despite the many advantages at the cathode side, DMI is not stable with bare Li anode. Thus, we have developed a pretreatment method to grow a protective artificial solid-state electrolyte interface (SEI) to prevent the unfavorable side-reactions on Li. The SEI film was formed via the reaction between fluorine-rich organic reagents and Li metal. It is composed of highly Li+-conducting LixBOy, LiF, LixNOy, Li3N particles and some organic compounds, in which LixBOy serves as a binder to enhance its mech. strength. With the protective SEI, the coulombic efficiency of Li plating/stripping in DMI electrolyte increased from 20% to 98.5% and the fixed capacity cycle life of the assembled LOB was elongated to 205 rounds, which was almost fivefold of the cycle life in DMSO (DMSO) or tetraglyme (TEGDME) based electrolytes. Our work demonstrates that mol. polarity and ionic solvation structure are the primary issues to be considered when designing high performance Li-O2 battery electrolytes, and cross-linked artificial SEI is effective in improving the anodic stability.

Science Bulletin published new progress about Battery anodes. 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