Tag: 0-100

《Exploring the impact of key assembling parameters on the electrochemical performance of lithium metal symmetry cell》 was written by Wen, Zhipeng; Lin, Yinxin; Peng, Yueying; Zeng, Jing; Zhao, Jinbao. Application of 872-36-6 And the article was included in Journal of the Electrochemical Society in 2020. The article conveys some information:

With the urgent demand for higher energy d. storage system, much attention has been focused on the Li metal based batteries. During the exploration of new strategy for the Li metal protection, numerous researches are based on Li/Li symmetry cell for galvanostatic cycling tests. Here, the relationship between some exptl. parameters (size of Li foil, thickness of separator and electrolyte amount) and Li/Li symmetry cell cycling performance are systematically explored. It was found that the cycling stability of Li/Li symmetry cell has been significantly improved when the size of Li foil decreases or the thickness of separator increases. In the designed experiments, it can be seen that the failure of most of cells is attributed to the decrease in ions transport ability due to continuous consumption of the electrolyte and continuous increase of dead Li. At last, the investigation of electrolyte amounts reveals that Li/Li symmetry cell exhibits lower Li deposition overpotential and longer cycling life as adding more electrolytes. Therefore, the work suggests that research on the protection of electrolyte is very important issue in promoting the commercialization of Li metal batteries. Standardizing exptl. parameters during the experiment can make more efficient comparison of different literature results achieved. The results came from multiple reactions, including the reaction of Vinylene carbonate(cas: 872-36-6Application of 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.Application of 872-36-6

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

《Effect of duty cycle on the lifetime of single crystal LiNi0.5Mn0.3Co0.2O2/graphite lithium-ion cells》 was written by Cheng, J. H.; Harlow, J. E.; Johnson, M. B.; Gauthier, Roby; Dahn, J. R.. Related Products of 872-36-6 And the article was included in Journal of the Electrochemical Society in 2020. The article conveys some information:

The effects of different duty cycles, involving mixtures of charge-discharge cycling and open-circuit storage segments, on the lifetime of single crystal NMC532/graphite cells were studied. Charge-discharge cycling was performed at C/3 with open circuit storage times of 0, 12, 84, 180 h or 3 mo applied at upper cutoff voltages (UCV) of 4.1, 4.2 and 4.3 V. Testing was made at 40°C for a period of 2.5 years. Cells tested to the same UCV showed similar capacity loss and impedance growth with time, independent of the ratio between the time spent cycling or in storage. Differential voltage anal. showed that the vast majority of the capacity loss stemmed from lithium inventory loss at the neg. electrode with little or no loss of active materials. The thickness of the pouch cells after testing increased with the fraction of time spent cycling and the amount of gas generated in the cells increased with fraction of time spent in storage at the UCV. These results show that cycled and stored cells age differently, even though a similar capacity fade rate was observed in the first 2.5 years of cell life, which may cause different failure modes at the end of cell life. In the experiment, the researchers used many compounds, for example, Vinylene carbonate(cas: 872-36-6Related Products of 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.Related Products of 872-36-6

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

《Scanning micro X-ray fluorescence (μXRF) as an effective tool in quantifying Fe dissolution in LiFePO4 cells: towards a mechanistic understanding of Fe dissolution》 was written by Eldesoky, A.; Logan, E. R.; Johnson, M. B.; McFarlane, C. R. M.; Dahn, J. R.. Name: Vinylene carbonate And the article was included in Journal of the Electrochemical Society in 2020. The article conveys some information:

Lithium iron phosphate (LiFePO4, or LFP) is a widely used cathode material in Li-ion cells due to its improved safety and low cost relative to other materials such as LiNixMnyCozO2 (x + y + z = 1, NMC). To improve the calendar life of LFP cells, an investigation of their failure mechanisms is necessary. Herein, the scanning micro X-ray fluorescence (μXRF) is used to study Fe dissolution from LFP and deposition on the graphite electrode, which is thought to be a contributor to capacity fade. The impacts of the vinylene carbonate (VC) electrolyte additive, cycling conditions, and water content in the pos. electrode on Fe dissolution were studied. There was no significant correlation between Fe dissolution and capacity fade found. Furthermore, it is proposed that gas generation concomitant with Fe dissolution might be due to the reduction of the organic species coordinating Fe2+ when they reach the neg. electrode. Localized regions of increased Fe loading on the anode surface were found, which corresponded to regions with slight non-uniformities in stack pressure or c.d. This work demonstrates the effectiveness of μXRF in quantifying transition metal (TM) dissolution in Li-ion cells without any sample treatments that might mask valuable information such as element spatial distribution.Vinylene carbonate(cas: 872-36-6Name: 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.Name: Vinylene carbonate

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

The author of 《Temperature dependent EIS studies separating charge transfer impedance from contact impedance in lithium-ion symmetric cells》 were Keefe, A. S.; Buteau, Samuel; Hill, I. G.; Dahn, J. R.. And the article was published in Journal of the Electrochemical Society in 2019. Electric Literature of C3H2O3 The author mentioned the following in the article:

Measuring electrochem. impedance spectra of lithium-ion sym. cells at low temperatures allows for unambiguous separation of charge transfer impedance contributions from other cell impedance features. Electrodes from dry Li[Ni0.5Mn0.3Co0.2]O2 (NMC 532)/artificial graphite (AG) pouch cells were used to make blocking electrode configuration sym. cells and blocking electrode full coin cells. NMC532/AG cells with 1.2M LiPF6 in EC:DMC 3:7 (w:w) electrolyte also underwent the formation process before the electrodes were used tomake non-blocking configuration sym. and full coin cells. Through the use of temperature dependent measurements on blocking and non-blocking cells, the impedance contribution due to faradaic, charge transfer interactions can be distinguished from non-faradaic, high frequency impedance contributions. Fitting the EIS spectra allowed both the charge transfer resistances and the related capacitances to be determined for the solid electrolyte interphase layers on the neg. and pos. electrodes. The charge transfer resistances were strongly temperature dependent while the capacitances were not. The temperature dependence of the charge transfer resistance was used to determine the activation energies for lithium transport through the solid electrolyte interphase layers on the neg. and pos. electrodes. Surprisingly, the activation energies were approx. 0.6 eV for both pos. and neg. electrodes extracted from cells after formation. After reading the article, we found that the author used Vinylene carbonate(cas: 872-36-6Electric Literature 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.Electric Literature of C3H2O3

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

Computed Properties of C5H6O2In 2019 ,《Regio- and Stereoselective Addition of Selenium Dichloride to Alkyl Propiolates》 was published in Russian Journal of Organic Chemistry. The article was written by Musalov, M. V.; Yakimov, V. A.; Potapov, V. A.; Andreev, M. V.; Amosova, S. V.. The article contains the following contents:

The reaction of selenium dichloride with Me and Et propiolates lead to formation of anti-Markovnikov adducts. The regio- and stereoselective synthesis of hitherto unknown bis[(E)-2-chloro-1-(alkoxycarbonyl)vinyl]selenides were developed based on this reaction. In the experiment, the researchers used Ethyl propiolate(cas: 623-47-2Computed Properties of C5H6O2)

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.Computed Properties of C5H6O2

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

Application In Synthesis of Vinylene carbonateIn 2020 ,《Studies of the SEI layers in Li(Ni0.5Mn0.3Co0.2)O2/rtificial graphite cells after formation and after cycling》 was published in Journal of the Electrochemical Society. The article was written by Keefe, A. S.; Weber, Rochelle; Hill, I. G.; Dahn, J. R.. The article contains the following contents:

Li(Ni0.5Mn0.3Co0.2)O2/artificial graphite cells containing different electrolyte additives were studied using electrochem. impedance spectroscopy (EIS) and XPS after formation and after long-term charge-discharge cycling. Pos. and neg. electrodes were examined sep. in sym. cells to study the solid electrolyte interphase (SEI) at Each electrode. EIS measurements were taken vs. temperature, and activation energies (Ea) related to Li+ transport through the SEI were calculated After cycling, Ea differed depending on electrolyte additive, electrode type, and cycling voltage limits. Charge transfer resistance was also compared after formation and cycling and did not always correlate with Ea trends, suggesting that multiple factors influence SEI properties. XPS was used to study the chem. composition and thickness of the SEI. Electrolyte additives affected the quantity of inorganic materials in the SEI, and more inorganic material appeared to correlate with lower Ea values. Cells containing Li difluorophosphate electrolyte additive had the best lifetime of the cells studied. These cells also showed the lowest SEI activation energy values, lowest charge transfer resistance, and most inorganic SEI composition after cycling. The results came from multiple reactions, including the reaction of Vinylene carbonate(cas: 872-36-6Application In Synthesis 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.Application In Synthesis of Vinylene carbonate

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

In 2022,Vila, Mallory N.; Bernardez, Edelmy Marin; Li, Wenzao; Stackhouse, Chavis A.; Kern, Christopher J.; Head, Ashley R.; Tong, Xiao; Yan, Shan; Wang, Lei; Bock, David C.; Takeuchi, Kenneth J.; Housel, Lisa M.; Marschilok, Amy C.; Takeuchi, Esther S. published an article in ACS Applied Materials & Interfaces. The title of the article was 《Interfacial Reactivity of Silicon Electrodes: Impact of Electrolyte Solvent and Presence of Conductive Carbon》.Reference of Vinylene carbonate The author mentioned the following in the article:

Silicon (Si) is a promising high-capacity material for lithium-ion batteries; however, its limited reversibility hinders com. adoption. Approaches such as particle and crystallite size reduction, introduction of conductive carbon, and use of different electrolyte solvents have been explored to overcome these electrochem. limitations. Herein, operando isothermal microcalorimetry (IMC) is used to probe the influence of silicon particle size, electrode composition, and electrolyte additives fluoroethylene carbonate and vinylene carbonate on the heat flow during silicon lithiation. The IMC data are complemented by X-ray photoelectron and Raman spectroscopies to elucidate differences in solid electrolyte interphase (SEI) composition Nanosized (~50 nm, n-Si) and micrometer-sized (~4μm, μ-Si) silicon electrodes are formulated with and without amorphous carbon and electrochem. lithiated in ethylene carbonate (EC), fluoroethylene carbonate (FEC), or vinylene carbonate (VC) based electrolytes. Notably, n-Si electrodes generate 53-61% more normalized heat relative to their μ-Si counterparts, consistent with increased surface area and electrode/electrolyte reactivity. Introduction of amorphous carbon significantly alters the heat flow profile where multiple exothermic peaks and increased normalized heat dissipation are observed for all electrolyte types. Notably, the VC-containing electrolyte demonstrates the greatest normalized heat dissipation of the electrode compositions tested showing as much as a 50% increase compared to the EC or FEC counterparts. The results are relevant to the understanding of silicon neg. electrode function in the presence of electrolyte additives and provide insight relative to silicon containing cell reactivity and safety.Vinylene carbonate(cas: 872-36-6Reference 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.Reference of Vinylene carbonate

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

The author of 《Metal- and Solvent-Free Ultrasonic Multicomponent Synthesis of (Z)-β-Iodo Vinylthiocyanates》 were Lu, Ling-Hui; Zhou, Si-Jia; Sun, Meng; Chen, Jia-Liang; Xia, Wen; Yu, Xianyong; Xu, Xinhua; He, Wei-Min. And the article was published in ACS Sustainable Chemistry & Engineering in 2019. Formula: C5H6O2 The author mentioned the following in the article:

An eco-friendly and practical method for the ultrasonic multicomponent synthesis of diverse (Z)-β-iodovinyl thiocyanates from cheap and com. available alkynes, mol. iodine, and KSCN through an intermol. H-bonding assistance strategy was developed. In the experiment, the researchers used many compounds, for example, Ethyl propiolate(cas: 623-47-2Formula: C5H6O2)

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.Formula: C5H6O2

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

Omale, Joel O.; Van Velthem, Pascal; Antohe, Vlad-Andrei; Vlad, Alexandru; Piraux, Luc published an article in 2021. The article was titled 《Effects of Electrolyte Additives and Nanowire Diameter on the Electrochemical Performance of Lithium-Ion Battery Anodes based on Interconnected Nickel-Tin Nanowire Networks》, and you may find the article in Energy Technology (Weinheim, Germany).HPLC of Formula: 872-36-6 The information in the text is summarized as follows:

Tin-based nanowire electrodes present desirable properties as lithium-ion battery anodes, because they undergo volume changes without pulverization. However, they suffer from limited mass loading and propensity for surface parasitic reactions. Herein, the electrochem. performances of nickel-tin 3D-interconnected nanowire network (NiSn 3DNWN) electrodes are evaluated with the nanowire diameters of 40, 105, and 230 nm, resp., that attain mass loadings of up to 3 mg cm-2. To mitigate the surface parasitic reactions, the effects of fluoroethylene carbonate (FEC) and vinylene carbonate (VC) additives are investigated as a function of the nanowire diameter and additive concentration The results show that the FEC and VC of all compositions improve the capacity retentions and coulombic efficiencies (CEs) of the NiSn 3DNWN electrodes. In 10 vol% FEC, the electrodes demonstrate a similar capacity of ≈550 mAh g-1, but the capacity retentions after 100 cycles are 73.68%, 53.79%, and 51.70% for the 40, 105, and 230 nm NiSn 3DNWN, resp. However, the 105 nm-diameter nanowire electrode has the highest average CE of 96.55%. Electrochem. impedance spectroscopy and post-cycling investigations reveal that the FEC has the most profound effect on the interfacial resistances, which is reflected in the rate performances of the tested electrodes. The experimental part of the paper was very detailed, including the reaction process of 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

《Fire-Preventing LiPF6 and Ethylene Carbonate-Based Organic Liquid Electrolyte System for Safer and Outperforming Lithium-Ion Batteries》 was written by Chung, Gyeong Jun; Han, Jisoo; Song, Seung-Wan. Reference of Vinylene carbonate And the article was included in ACS Applied Materials & Interfaces in 2020. The article conveys some information:

Battery safety is an ever-increasing significance to guarantee consumer’s safety. Reducing or preventing the risk of battery fire and explosion is a must for battery manufacturers. Major reason for the occurrence of fire in com. lithium-ion batteries is the flammability of conventional organic liquid electrolyte, which is typically composed of 1 M LiPF6 salt and ethylene carbonate (EC)-based organic solvents. Herein, we report the designed 1 M LiPF6 and EC-based nonflammable electrolyte including methyl(2,2,2-trifluoroethyl)carbonate, which breaks the conventional perception that EC-based liquid electrolyte is always flammable. The designed electrolyte also provides high anodic stability beyond the conventional charge cut-off voltage of 4.2 V. A graphite‖LiNi0.6Co0.2Mn0.2O2 lithium-ion full cell with our designed EC-based nonflammable electrolyte with a small fraction of vinylene carbonate additive under an aggressive condition of 4.5 V charge cut-off voltage, 0.5C rate, and 45°C exhibits increased capacity, reduced interfacial resistance, and improved performance and rate capability. A basic understanding of how a high-voltage cathode-electrolyte interface and anode-electrolyte interface are stabilized and how failure modes are mitigated by fire-preventing electrolyte is discussed. After reading the article, we found that the author used Vinylene carbonate(cas: 872-36-6Reference 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.Reference of Vinylene carbonate

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