Month: December 2022

Matsuda, Shoichi published the artcileHighly Efficient Oxygen Evolution Reaction in Rechargeable Lithium-Oxygen Batteries with Triethylphosphate-Based Electrolytes, Product Details of C10H22O5, the main research area is lithium oxygen battry triethylphosphate based electrolyte.

Aprotic lithium-oxygen (Li-O2) batteries are promising candidates for next-generation energy storage devices because of their much higher potential energy d. than Li-ion batteries. However, the practical application of rechargeable Li-O2 batteries has been limited by poor cycle performance, especially the side reactions that lower the oxygen reaction efficiency at the pos. electrode. The present study demonstrated that when the triethylphosphate-based electrolyte contains lithium nitrate and triethylphosphate forms a solvated complex by coordinating with Li ions, the O2 evolution rate could reach almost 100% of that of the ideal two-electron reaction (O2/e- = 0.5) during the most part of the charging process, with the total oxygen evolution yield exceeding 90%. These results are useful for designing electrolytes for rechargeable Li-O2 batteries with high energy densities.

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, Product Details of C10H22O5.

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

Kim, Hee-Sang published the artcileEffect of Urea as Electrolyte Additive for Stabilization of Lithium Metal Electrodes, COA of Formula: C10H22O5, the main research area is urea electrolyte additive lithium metal electrode stabilization.

Owing to its lowest standard redox potential, low d., and high theor. specific capacity, lithium metal has been considered to be the ideal anode material for secondary lithium batteries. However, lithium metal is thermodynamically unstable in liquid organic electrolytes (LOEs). When lithium metal comes in contact with an LOE, it reacts easily with it to form the solid electrolyte interphase (SEI) layer. Once the stable and robust SEI layer forms, it can inhibit the direct contact between lithium metal and LOE and the further decomposition of the electrolyte. Nevertheless, the inhomogeneity in chem. composition or thickness of the SEI layer can cause the growth of lithium dendrites, which lead to short-circuits in batteries. In this study, we suggested the use of urea as a new electrolyte additive to restrain the growth of lithium dendrites via the formation of a uniform and robust SEI layer on the lithium surface. The Li sym. cell with 0.5 M urea electrolyte additive exhibited better cyclability over 415 cycles at 1 mA cm-2; this number of cycles was >40 times larger than that of the Li sym. cell without urea additive. Further, the Li-O2 cell with electrolyte additive was cycled for more than 200 cycles at 0.1 mA cm-2 under the limited capacity mode of 1000 mA h g-1. The enhancement of the cyclability of Li metal-based batteries using urea as an electrolyte additive suppresses the growth of lithium dendrites.

ACS Sustainable Chemistry & Engineering 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, COA of Formula: C10H22O5.

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

Kuepers, V. published the artcileApproaching electrochemical limits of MgxClyz+ complex-based electrolytes for Mg batteries by tailoring the solution structure, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is electrochem magnesium chloride electrolytes batteries.

The future demand for energy storage requires the development of next generation batteries, e.g. based on magnesium (Mg). Mg as anode material offers great advantages such as low costs and a high volumetric capacity compared to state-of-the-art anodes. However, the lower standard potential of Mg|Mg2+ (-2.36 V vs SHE) compared to Li|Li+ (-3.04 V vs SHE) or Li+ intercalation/deintercalation into/from graphite (≈-2.95 V vs SHE) emerges the need for high voltage cathodes and suitable electrolytes to achieve competitive cell energy values. The oxidative stabilities of less than 3.5 V vs Mg|Mg2+ for most of those electrolytes which enable Mg electrodeposition/-dissolution is too low to facilitate needed high-voltage Mg-based batteries. In this study, we therefore investigate the limits of oxidative stability of a commonly used Mg(TFSI)2- and MgCl2-based electrolyte by variation of solvents (ethers and ionic liquids) and salt ratios. Further on, we highlight the underlying reasons for the oxidative stability limits.

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, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane.

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

Bevilacqua, Sarah C. published the artcileEffect of the Electrolyte Solvent on Redox Processes in Mg-S Batteries, COA of Formula: C10H22O5, the main research area is magnesium sulfur battery electrolyte solvent redox process.

Mg-S batteries are attractive for next-generation energy storage because of their high theor. capacity and low cost. The foremost challenge in Mg-S batteries is designing electrolytes that support reversible electrochem. at both electrodes. Here, we target a solution-mediated reduction pathway for the S8 cathode by tailoring the electrolyte solvent. Varying the solvent in Mg-based systems is complicated because of the active nature of the solvent in solvating Mg2+ and the complex dynamics of electrolyte-Mg interfaces. To understand the effect of the solvent on the S8 reduction processes in the Mg-S cell, the magnesium-aluminum chloride complex (MACC) electrolyte was prepared in different ethereal solvents. Reversible Mg electrodeposition is demonstrated in the MACC electrolyte in several solvent systems. The electrodeposition overpotentials and current densities are found to vary with the solvent, suggesting that the solvent plays a noninnocent role in the electrochem. processes at the Mg interface. Mg-S cells are prepared with the electrolytes to understand how the solvent affects the reduction of S8. A reductive wave is present in all linear-sweep voltammograms, and the peak potential varies with the solvent. The peak potential is approx. 0.8 V vs. Mg/Mg2+, lower than the expected reduction potential of 1.7 V. We rule out passivation of the Mg anode as the cause for the low voltage peak potential, making processes at the S8 cathode the likely culprit. The ability to oxidize MgS with the MACC electrolyte is also examined, and we find that the oxidation current can be attributed to side reactions at the C-electrolyte interface.

Inorganic Chemistry 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, COA of Formula: C10H22O5.

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

Wu, Mihye published the artcileUnderstanding Reaction Pathways in High Dielectric Electrolytes Using β-Mo2C as a Catalyst for Li-CO2 Batteries, Product Details of C10H22O5, the main research area is lithium carbon dioxide battery molybdenum carbide discharge product electrolyte; Li−CO2 batteries; discharge products; electrolyte effect; molybdenum carbides; reaction pathway.

The rechargeable Li-CO2 battery has attracted considerable attention in recent years because of its carbon dioxide (CO2) utilization and because it represents a practical Li-air battery. As with other battery systems such as the Li-ion, Li-O2, and Li-S battery systems, understanding the reaction pathway is the first step to achieving high battery performance because the performance is strongly affected by reaction intermediates. Despite intensive efforts in this area, the effect of material parameters (e.g., the electrolyte, the cathode, and the catalyst) on the reaction pathway in Li-CO2 batteries is not yet fully understood. Here, we show for the first time that the discharge reaction pathway of a Li-CO2 battery composed of graphene nanoplatelets/beta phase of molybdenum carbide (GNPs/β-Mo2C) is strongly influenced by the dielec. constant of its electrolyte. Calculations using the continuum solvents model show that the energy of adsorption of oxalate (C2O42-) onto Mo2C under the low-dielec. electrolyte tetraethylene glycol di-Me ether is lower than that under the high-dielec. electrolyte N,N-dimethylacetamide (DMA), indicating that the electrolyte plays a critical role in determining the reaction pathway. The exptl. results show that under the high-dielec. DMA electrolyte, the formation of lithium carbonate (Li2CO3) as a discharge product is favorable because of the instability of the oxalate species, confirming that the dielec. properties of the electrolyte play an important role in the formation of the discharge product. The resulting Li-CO2 battery exhibits improved battery performance, including a reduced overpotential and a remarkable discharge capacity as high as 14,000 mA h g-1 because of its lower internal resistance. We believe that this work provides insights for the design of Li-CO2 batteries with enhanced performance for practical Li-air battery applications.

ACS Applied Materials & Interfaces 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

Bieker, Georg published the artcileThe Power of Stoichiometry: Conditioning and Speciation of MgCl2/AlCl3 in Tetraethylene Glycol Dimethyl Ether-Based Electrolytes, Product Details of C10H22O5, the main research area is magnesium battery electrolyte magnesium anode conditioning corrosion; conditioning; corrosion; electrolyte; magnesium anode; magnesium battery.

In many Mg-based battery systems, the reversibility of Mg deposition and dissolution is lowered by parasitic formation processes of the electrolyte. Therefore, high Coulombic efficiencies of Mg deposition and dissolution are only achieved after several “”conditioning”” cycles. As this phenomenon is especially reported for AlCl3-containing solutions, this study focuses on the “”conditioning”” mechanisms of MgCl2/AlCl3 and MgHMDS2/AlCl3 (HMDS = hexamethyldisilazide) in tetraethylene glycol di-Me ether (TEGDME)-based electrolytes. Electrochem. (cyclic voltammetry) and spectroscopic investigations (27Al NMR spectroscopy, Raman spectroscopy, inductively coupled plasma optical emission spectroscopy, SEM, and energy-dispersive X-ray spectroscopy) reveal that cationic AlCl2+ species in TEGDME-based electrolytes with an AlCl3/MgCl2 ratio higher than 1:1 corrode the Mg metal. According to a cementation reaction mechanism, the corrosion of Mg is accompanied with Al deposition. In effect, the consumption of Mg results in low Coulombic efficiencies of Mg deposition and dissolution during the electrolyte “”conditioning””. After understanding the mechanism of this process, we demonstrate that a careful adjustment of the stoichiometry in MgCl2/AlCl3 and MgHMDS2/AlCl3 in TEGDME formulations prevents Mg corrosion and results in “”conditioning””-free, highly efficient Mg deposition and dissolution

ACS Applied Materials & Interfaces 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

Jaumaux, Pauline published the artcileLocalized Water-In-Salt Electrolyte for Aqueous Lithium-Ion Batteries, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is water lithium nitrate manganese oxide ion battery electrolyte stability; 1,5-pentanediol; aqueous lithium ion battery; lithium nitrate; localized water-in-salt electrolyte; solid electrolyte interphase.

Water-in-salt (WIS) electrolytes using super-concentrated organic lithium (Li) salts are of interest for aqueous Li-ion batteries. However, the high salt cost, high viscosity, poor wettability, and environmental hazards remain a great challenge. Herein, we present a localized water-in-salt (LWIS) electrolyte based on low-cost lithium nitrate (LiNO3) salt and 1,5-pentanediol (PD) as inert diluent. The addition of PD maintains the solvation structure of the WIS electrolyte, improves the electrolyte stability via hydrogen-bonding interactions with water and NO3- mols., and reduces the total salt concentration By in situ gelling the LWIS electrolyte with tetraethylene glycol diacrylate (TEGDA) monomer, the electrolyte stability window can be further expanded to 3.0 V. The as-developed Mo6S8|LWIS gel electrolyte|LiMn2O4 (LMO) batteries delivered outstanding cycling performance with an average Coulombic efficiency of 98.53% after 250 cycles at 1 C.

Angewandte Chemie, International Edition 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

Carter, Rachel published the artcileOptical Microscopy Reveals the Ambient Sodium-Sulfur Discharge Mechanism, Product Details of C10H22O5, the main research area is sodium sulfur battery discharge mechanism cathode anode electrolyte.

With growing demand for energy storage, there is renewed interest in ambient sodium-sulfur batteries, which boast raw material costs below $1/kWh owing to the natural abundance and high theor. energy d. of the pairing. As with lithium, sodium electrochem. reacts with sulfur in ether-based electrolytes, and the intermediate discharge products (polysulfides) dissolve in the battery electrolyte. These polysulfide intermediates have distinct colors, from red-brown to yellow. Addnl., when the solvent permits chem. reordering, the S3•- radical is detected with a blue hue. Radicalization hinders the electrochem. reaction by altering charge balance. Since the reaction intermediates exist with distinct colors, their evolution can be identified during electrochem. discharge with an in-situ optical cell. Optical anal. facilitates detection and characterization of intermediate products across a broader concentration range that is not accessed by more complex in-situ UV-vis spectroscopy. We demonstrate the utility of in-situ optical microscopy for comparing the ambient discharge mechanism in electrolytes from the glyme family. These chain-like solvents, from monoglyme (G1) to tetraglyme (G4), have a greater stabilizing effect on sodium electroplating than for lithium, warranting their investigation at the sulfur cathode. Both the in-situ experiment and stoichiometric solutions reveal that G1 results in the lowest polysulfide solubility and the least sulfur radicalization, while G4 has the greatest. G2 falls between them. Image anal. of the electrolyte between the sulfur working electrode and sodium counter allow for the red, green, and blue image pixilation (RGB) and image brightness to be assessed. With this anal., we can assign the evolution of particular polysulfides to discharge voltage features. In-situ optical microscopy diagnoses electrolyte color changes during room temperature discharge of a sodium-sulfur cell.

ACS Sustainable Chemistry & Engineering 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

Safanama, Dorsasadat published the artcileRound-Trip Efficiency Enhancement of Hybrid Li-Air Battery Enables Efficient Power Generation from Low-Grade Waste Heat, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is hybrid lithium air battery waste heat solid electrolyte.

The superior energy d. renders hybrid Li-air batteries (HLABs) promising candidate energy storage systems to enhance the sustainability of power grids. Nevertheless, HLABs operated at ambient temperature struggle to meet power and cycle life performance requirements for com. application. At the same time, low-grade heat is abundantly available from industrial processes as well as from solar-thermal or geothermal sources, but there is a blatant lack of technologies to efficiently convert low-grade waste heat into valuable elec. energy. We find that cells operated with an anolyte of tetraethylene glycol di-Me ether and 1 M aqueous lithium hydroxide as the catholyte achieve a marked decrease in cell polarization with an increasing operation temperature of up to 80°C. Therefore, the energy efficiency, η, can be increased significantly. While the increase from ηRT = 90% at room temperature to η353K = 98% efficiency at a reference c.d. 0.03 mA cm-2 may appear gradual, the increase in efficiency becomes rapidly more prominent with increasing c.d. (e.g., from ηRT = 59% to η353K = 84% at 0.5 mA cm-2). The addnl. elec. energy that can be drawn from a HLAB heated by low-grade waste heat leads to a highly attractive heat-to-power conversion efficiency. Enhancing the round-trip efficiency of grid-scale Li-air batteries opens a path to convert low-grade waste heat into valuable elec. energy.

ACS Sustainable Chemistry & Engineering 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

Wu, Xiaohong published the artcileStabilizing Li-O2 Batteries with Multifunctional Fluorinated Graphene, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium oxygen battery electrolyte fluorinated graphene lithium metal anode; Li-metal anode; Li−O2 batteries; ORR; fluorinated graphene; superoxide.

As a full cell system with attractive theor. energy d., challenges faced by Li-O2 batteries (LOBs) are not only the deficient actual capacity and superoxide-derived parasitic reactions on the cathode side but also the stability of Li-metal anode. To solve simultaneously intrinsic issues, multifunctional fluorinated graphene (CFx, x = 1, F-Gr) was introduced into the ether-based electrolyte of LOBs. F-Gr can accelerate O2- transformation and O2–participated oxygen reduction reaction (ORR) process, resulting in enhanced discharge capacity and restrained O2–derived side reactions of LOBs, resp. Moreover, F-Gr induced the F-rich and O-depleted solid electrolyte interphase (SEI) film formation, which have improved Li-metal stability. Therefore, energy storage capacity, efficiency, and cyclability of LOBs have been markedly enhanced. More importantly, the method developed in this work to disperse F-Gr into an ether-based electrolyte for improving LOBs’ performances is convenient and significant from both scientific and engineering aspects.

Nano 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, Safety of 2,5,8,11,14-Pentaoxapentadecane.

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