Tag: 0-100

《Atomic to Nanoscale Origin of Vinylene Carbonate Enhanced Cycling Stability of Lithium Metal Anode Revealed by Cryo-Transmission Electron Microscopy》 was written by Xu, Yaobin; Wu, Haiping; He, Yang; Chen, Qingsong; Zhang, Ji-Guang; Xu, Wu; Wang, Chongmin. Quality Control of Vinylene carbonateThis research focused onvinylene carbonate enhanced cycling lithium anode cryotransmission electron microscopy; lithium ion battery vinylene carbonate electrolyte additive safety; Lithium (Li) metal; cryogenic transmission electron microscopy (cryo-TEM); electrochemical deposition; electrolyte; solid electrolyte interphase (SEI); vinylene carbonate (VC). The article conveys some information:

Batteries using lithium (Li) metal as the anode are considered promising energy storage systems because of their high specific energy densities. The crucial bottlenecks for Li metal anode are Li dendrites growth and side reactions with electrolyte inducing safety concern, low Coulombic efficiency (CE), and short cycle life. Vinylene carbonate (VC), as an effective electrolyte additive in Li-ion batteries, has been noticed to significantly enhance the CE, whereas the origin of such an additive remains unclear. Here cryogenic transmission electron microscopy imaging combing with energy dispersive X-ray spectroscopy elemental and electron energy loss spectroscopy electronic structure analyses are used to reveal the role of the VC additive. It is discovered that the electrochem. deposited Li metal (EDLi) in the VC-containing electrolyte is slightly oxidized with the solid electrolyte interphase (SEI) being a nanoscale mosaic-like structure comprised of organic species, Li2O and Li2CO3, whereas the EDLi formed in the VC-free electrolyte is featured by a combination of fully oxidized Li with Li2O SEI layer and pure Li metal with multilayer nanostructured SEI. These results highlight the possible tuning of crucial structural and chem. features of EDLi and SEI through additives and consequently direct correlation with electrochem. performance, providing valuable guidelines to rational selection, design, and synthesis of additives for new battery chemistries. After reading the article, we found that the author used Vinylene carbonate(cas: 872-36-6Quality Control of Vinylene carbonate)

Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.Quality Control of Vinylene carbonate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

In 2022,Asheim, K.; Vullum, P. E.; Wagner, N. P.; Andersen, H. F.; Maehlen, J. P.; Svensson, A. M. published an article in RSC Advances. The title of the article was 《Improved electrochemical performance and solid electrolyte interphase properties of electrolytes based on lithium bis(fluorosulfonyl)imide for high content silicon anodes》.HPLC of Formula: 872-36-6 The author mentioned the following in the article:

Electrodes containing 60 wt% micron-sized silicon were investigated with electrolytes containing carbonate solvents and either LiPF6or lithium bis(fluorosulfonyl)imide (LiFSI) salt. The electrodes showed improved performance, with respect to capacity, cycling stability, rate performance, electrode resistance and cycle life with the LiFSI salt, attributed to differences in the solid electrolyte interphase (SEI). Through impedance spectroscopy, cross sectional anal. using transmission electron microscopy (TEM) and focused ion beam (FIB) in combination with SEM (SEM), and electrode surface characterization by XPS, differences in electrode morphol. changes, SEI composition and local distribution of SEI components were investigated. The SEI formed with LiFSI has a thin, inner, primarily inorganic layer, and an outer layer dominated by organic components. This SEI appeared more homogeneous and stable, more flexible and with a lower resistivity than the SEI formed in LiPF6 electrolyte. The SEI formed in the LiPF6 electrolyte appears to be less passivating and less flexible, with a higher resistance, and with higher capacitance values, indicative of a higher interfacial surface area. Cycling in LiPF6 electrolyte also resulted in incomplete lithiation of silicon particles, attributed to the inhomogeneous SEI formed. In contrast to LiFSI, where LiF was present in small grains in-between the silicon particles, clusters of LiF were observed around the carbon black for the LiPF6electrolyte. In the experimental materials used by the author, we found Vinylene carbonate(cas: 872-36-6HPLC of Formula: 872-36-6)

Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.HPLC of Formula: 872-36-6

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

《Inorganic/polymer hybrid layer stabilizing anode/electrolyte interfaces in solid-state Li metal batteries》 was written by Hu, Yiran; Zhong, Yiren; Qi, Limin; Wang, Hailiang. Category: esters-buliding-blocks And the article was included in Nano Research in 2020. The article conveys some information:

Li1.5Al0.5Ge1.5(PO4)3 (LAGP) is a solid-state electrolyte with high ionic conductivity and air stability but poor chem. stability and high interfacial impedance when directly contacted with Li metal. In this work, we develop an inorganic/polymer hybrid interlayer composed of Li bis(trifluoromethylsulfonyl)imide/poly(vinylene carbonate) polymer electrolyte and SiO2 submicrospheres to stabilize the Li/LAGP interface. The polymeric component renders high ionic conductance and low interfacial resistance, whereas the inorganic component imparts flame retardancy and a phys. barrier to the known Li-LAGP side reaction, together enabling stable Li stripping/plating for more than 1,500 h at room temperature With this interlayer at both electrodes, all-solid-state Li‖LiFePO4 full cells with stable cycling performance are also demonstrated. [graphic not available: see fulltext] In addition to this study using Vinylene carbonate, there are many other studies that have used Vinylene carbonate(cas: 872-36-6Category: esters-buliding-blocks) was used in this study.

Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

《Molecular design for electrolyte solvents enabling energy-dense and long-cycling lithium metal batteries》 was written by Yu, Zhiao; Wang, Hansen; Kong, Xian; Huang, William; Tsao, Yuchi; Mackanic, David G.; Wang, Kecheng; Wang, Xinchang; Huang, Wenxiao; Choudhury, Snehashis; Zheng, Yu; Amanchukwu, Chibueze V.; Hung, Samantha T.; Ma, Yuting; Lomeli, Eder G.; Qin, Jian; Cui, Yi; Bao, Zhenan. Safety of Vinylene carbonate And the article was included in Nature Energy in 2020. The article conveys some information:

Electrolyte engineering is critical for developing Li metal batteries. While recent works improved Li metal cyclability, a methodol. for rational electrolyte design remains lacking. Herein, we propose a design strategy for electrolytes that enable anode-free Li metal batteries with single-solvent single-salt formations at standard concentrations Rational incorporation of -CF2- units yields fluorinated 1,4-dimethoxylbutane as the electrolyte solvent. Paired with 1 M lithium bis(fluorosulfonyl)imide, this electrolyte possesses unique Li-F binding and high anion/solvent ratio in the solvation sheath, leading to excellent compatibility with both Li metal anodes (Coulombic efficiency ∼ 99.52% and fast activation within five cycles) and high-voltage cathodes (∼6 V stability). Fifty-μm-thick Li|NMC batteries retain 90% capacity after 420 cycles with an average Coulombic efficiency of 99.98%. Industrial anode-free pouch cells achieve ∼325 Wh kg-1 single-cell energy d. and 80% capacity retention after 100 cycles. Our design concept for electrolytes provides a promising path to high-energy, long-cycling Li metal batteries.Vinylene carbonate(cas: 872-36-6Safety of Vinylene carbonate) was used in this study.

Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.Safety of Vinylene carbonate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Shiga, Tohru; Masuoka, Yumi; Nozaki, Hiroshi published their research in RSC Advances in 2021. The article was titled 《Observation of lithium stripping in super-concentrated electrolyte at potentials lower than regular Li stripping》.Recommanded Product: 872-36-6 The article contains the following contents:

Lithium plating/stripping was investigated under constant current mode using a copper powder electrode in a super-concentrated electrolyte of lithium bis(fluorosulfonyl)amide (LiFSA) with methylphenylamino-di(trifluoroethyl) phosphate (PNMePh) and vinylene carbonate (VC) as additives. Typical Li plating/stripping for Cu electrodes in organic electrolytes of conventional lithium batteries proceeds at potentials of several millivolts vs. a Li counter electrode. In contrast, a large overpotential of hundreds of millivolts was observed for Li plating/stripping with the super-concentrated electrolyte. When Li stripping started immediately after Li plating and with no rest time between plating and stripping, two potential plateaus, i.e., two-step Li stripping, was observed The potential plateau for the 1st stripping step appeared at -0.2 V vs. a Li metal counter electrode. The elec. capacity for the 1st stripping step was 0.04 mA h cm-2, which indicates irregular Li stripping. Two-step Li stripping was also recorded using cyclic voltammetry. The electrochem. impedance spectroscopy (EIS) studies indicated that the two-step Li stripping behavior reflected two different solid electrolyte interphases (SEIs) on electrodeposited Li in a Cu electrode. The SEI for the 1st-step stripping was in a transition period of the SEI formation. The open circuit voltage (OCV) relaxation with an order of tens of hours was detected after Li plating and before Li stripping. The in operando EIS study suggested a decrease of the charge transfer resistance in the Cu powder electrode during the OCV relaxation. Since the capacitance for the voltage relaxation was a dozen microfarads, it had a slight contribution to the 1st-step Li stripping behavior. The voltage relaxation indicated the possibility that it is difficult for Li ions to be electrodeposited or that the Li plating is in a quasi-stable state. The results came from multiple reactions, including the reaction of Vinylene carbonate(cas: 872-36-6Recommanded Product: 872-36-6)

Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.Recommanded Product: 872-36-6

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

《Phosphine-Catalyzed Remote 1,7-Addition for Synthesis of Diene Carboxylates》 was written by Feng, Jiaxu; Huang, You. Related Products of 623-47-2 And the article was included in ACS Catalysis in 2020. The article conveys some information:

A phosphine-catalyzed remote 1,7-addition of vinyl allenoates was developed, providing a series of 1,3-dienes derivatives in high yields (up to 99%) and with good chemo-, regio- and stereoselectivity. This reaction demonstrated that the introduction of vinyl in allenoates effectively extended reaction types of phosphine-catalyzed nucleophilic addition of allenoates, led to concise synthesis of diene carboxylates. Notably, the enantioselective variant of this 1,7-addition was also performed by chiral phosphine catalyst. In the part of experimental materials, we found many familiar compounds, such as Ethyl propiolate(cas: 623-47-2Related Products of 623-47-2)

Ethyl propiolate(cas: 623-47-2) is a clear colorless to pale yellow liquid that is soluble in ethanol, ether and chloroform. It an important organic chemical raw material and pharmaceutical intermediate. Ethyl propargylate is obtained by oxidation of propargyl alcohol to propargylic acid followed by esterification.Related Products of 623-47-2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

《Enantioselective Alkynylation of Unstabilized Cyclic Iminium Ions》 was written by Guan, Weiye; Santana, Samantha O.; Liao, Jennie; Henninger, Kelci; Watson, Mary P.. HPLC of Formula: 623-47-2 And the article was included in ACS Catalysis in 2020. The article conveys some information:

An enantioselective copper-catalyzed alkynylation of unstabilized cyclic iminium ions has been developed. Whereas such alkynylations typically utilize pyridinium, quinolinium, and isoquinolinium intermediates, this method enables use of cyclic iminium ions unstabilized by resonance. With the use of a Lewis acid and copper catalyst, these iminium ions are generated in situ from readily available hemiaminal Me ethers and transformed into highly enantioenriched α-alkynylated cyclic amines. A variety of terminal alkynes can be incorporated in high yields and enantiomeric excesses.Ethyl propiolate(cas: 623-47-2HPLC of Formula: 623-47-2) was used in this study.

Ethyl propiolate(cas: 623-47-2) is a clear colorless to pale yellow liquid that is soluble in ethanol, ether and chloroform. It an important organic chemical raw material and pharmaceutical intermediate. Ethyl propargylate is obtained by oxidation of propargyl alcohol to propargylic acid followed by esterification.HPLC of Formula: 623-47-2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

《Electrolyte-Phobic Surface for the Next-Generation Nanostructured Battery Electrodes》 was published in Nano Letters in 2020. These research results belong to Qian, Chenxi; Zhao, Jie; Sun, Yongming; Lee, Hye Ryoung; Luo, Langli; Makaremi, Meysam; Mukherjee, Sankha; Wang, Jiangyan; Zu, Chenxi; Xia, Meikun; Wang, Chongmin; Singh, Chandra Veer; Cui, Yi; Ozin, Geoffrey A.. Computed Properties of C3H2O3 The article mentions the following:

Nanostructured electrodes are among the most important candidates for high-capacity battery chem. However, the high surface area they possess causes serious issues. First, it would decrease the Coulombic efficiencies. Second, they have significant intakes of liquid electrolytes, which reduce the energy d. and increase the battery cost. Third, solid-electrolyte interphase growth is accelerated, affecting the cycling stability. Therefore, the interphase chem. regarding electrolyte contact is crucial, which was rarely studied. Here, we present a completely new strategy of limiting effective surface area by introducing an “”electrolyte-phobic surface””. Using this method, the electrolyte intake was limited. The initial Coulombic efficiencies were increased up to ~88%, compared to ~60% of the control. The electrolyte-phobic layer of Si particles is also compatible with the binder, stabilizing the electrode for long-term cycling. This study advances the understanding of interphase chem., and the introduction of the universal concept of electrolyte-phobicity benefits the next-generation battery designs. In the experiment, the researchers used Vinylene carbonate(cas: 872-36-6Computed Properties of C3H2O3)

Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.Computed Properties of C3H2O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

In 2019,Organic Letters included an article by Dai, Peng; Tan, Xin; Luo, Qian; Yu, Xiang; Zhang, Shuguang; Liu, Fang; Zhang, Wei-Hua. HPLC of Formula: 623-47-2. The article was titled 《Synthesis of 3-Acyl-isoxazoles and Δ2-Isoxazolines from Methyl Ketones, Alkynes or Alkenes, and tert-Butyl Nitrite via a Csp3-H Radical Functionalization/Cycloaddition Cascade》. The information in the text is summarized as follows:

A novel metal-free tandem Csp3-H bond functionalization of ketones and 1,3-dipolar cycloaddition was developed. An efficient approach to a variety of oxazole and isoxazoline derivatives is demonstrated using the 1,3-dipolar cycloaddition of alkynes and alkenes to nitrile oxides generated by reactions of Me ketones with tert-Bu nitrite. This new protocol provides access to a variety of isoxazolines with diverse functionalities. An isoxazole generated in this way has significant antifungal activity. In the experimental materials used by the author, we found Ethyl propiolate(cas: 623-47-2HPLC of Formula: 623-47-2)

Ethyl propiolate(cas: 623-47-2) is a clear colorless to pale yellow liquid that is soluble in ethanol, ether and chloroform. It an important organic chemical raw material and pharmaceutical intermediate. Ethyl propargylate is obtained by oxidation of propargyl alcohol to propargylic acid followed by esterification.HPLC of Formula: 623-47-2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

《Synthesis of fused conjugated polymers containing imidazo[2,1-b]thiazole units by multicomponent one-pot polymerization》 was written by Dong, Ru; Chen, Qi; Cai, Xuediao; Zhang, Qi; Liu, Zhike. Recommanded Product: Ethyl propiolate And the article was included in Polymer Chemistry in 2020. The article conveys some information:

We herein report a facile and efficient multicomponent polymerization approach to construct fused heterocyclic polymers with imidazo[2,1-b]thiazole units in the main chain. A preliminary polymerization reaction was carried out as a model reaction with 1,4-phthalaldehyde, [6,6′-bibenzothiazole]-2,2′-diamine and 1-ethynyl-4-hexylbenzene as monomers, and different polymerization conditions, including the catalyst, catalyst amount and solvent, were optimized. Based on the optimized conditions, a series of fused heterocyclic conjugated polymers containing imidazo[2,1-b]thiazole units with high-mol. weights (Mn up to 5.7 x 104) in moderate yields (up to 54.3%) were obtained. With imidazo[2,1-b]thiazoles embedded in the main chains, the resulting polymers possess outstanding solubility, relatively good thermal stability and low energy bands. A possible mechanism was proposed for the polymerization including a 5-exo-dig cyclization and then an aromatization process. In the part of experimental materials, we found many familiar compounds, such as Ethyl propiolate(cas: 623-47-2Recommanded Product: Ethyl propiolate)

Ethyl propiolate(cas: 623-47-2) is a clear colorless to pale yellow liquid that is soluble in ethanol, ether and chloroform. It an important organic chemical raw material and pharmaceutical intermediate. Ethyl propargylate is obtained by oxidation of propargyl alcohol to propargylic acid followed by esterification.Recommanded Product: Ethyl propiolate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics