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Electrochemical Energy
Published in Prasanth Raghavan, Fatima M. J. Jabeen, Polymer Electrolytes for Energy Storage Devices, 2021
P. P. Abhijith, N. S. Jishnu, Neethu T. M. Balakrishnan, Akhila Das, Jou-Hyeon Ahn, Jabeen Fatima M. J., Prasanth Raghavan
Lithium battery technology provides greater energy density, greater energy per volume, longer cycle life, and improved reliability. Lithium is a lightweight metal with great electrochemical potential and provides the highest specific energy per unit weight. Lithium batteries have a wide range of applications in various portable electronic devices, such as laptops, computers, mobile phones, telecommunication devices, etc. Lithium-metal batteries are non-rechargeable and are collectively known as lithium primary batteries. For a lithium battery, the anode material used is metallic lithium and the cathode material is manganese dioxide, thionyl chloride (SOCl2), or iron disulfide (FeS2), among others, with the electrolyte being a salt of lithium dissolved in an organic solvent, usually composed of propylene carbonate and a low-viscosity solvent such as dimethoxyethane.
Electrolytes for Lithium-Sulfur Batteries
Published in Władysław Wieczorek, Janusz Płocharski, Designing Electrolytes for Lithium-Ion and Post-Lithium Batteries, 2021
Ethers are the most commonly used solvents in Li-S battery research. The reason is that they are much more stable toward polysulfides compared, for example, to carbonates. The list of ethers used is very broad—both linear and cyclic, as well as short-chain and polymeric ethers, such as 1,2-dimethoxyethane (DME or G1), tetrahydrofuran (THF), dioxilane (DOL), tetraglyme (TEGDME or G4), triglyme (DGM or G3), partially silanized ethers, and poly(ethylene glycol) dimethyl ether (PEGDME) [15, 22].
Application of dopant-induced structure-property changes of conducting polymers
Published in W.R. Salaneck, D.T. Clark, E.J. Samuelsen, Science and Applications of Conducting Polymers, 2020
L.W. Shacklette, R. H. Baughman
The conducting polymer battery is among the many areas pioneered by MacDiarmid, Heeger, and coworkers (Nigrey et al. 1979). The first major commercial application of conducting polymers has been in button cell batteries of Bridgestone-Seiko (Nakajima and Kawagoe 1989). These rechargeable batteries utilize polyaniline as a positive electrode (cathode), lithium-aluminium alloy as the negative electrode (anode), and LiBF4 in a mixture of propylene carbonate and 1,2-dimethoxyethane as electrolyte. During battery discharge, electrons move from the lithium alloy anode to the polyaniline cathode as Li+
Redox induced electron transfer in lithium polysulfide – A DFT study
Published in Journal of Sulfur Chemistry, 2023
Meera Cheviri, Senthilkumar Lakshmipathi
Now, based on the above calculation of Fukui function in lithium polysulfides molecules and the role of the electric field is vital to establish the presence of RIET. Therefore, Li2S6, Li2S5, Li2S2 and Li2S are selected for the Fukui function and RIET calculations. The above polysulfide molecules are alone considered for the following reasons: 1. Li2S6 is regarded as the probe molecule based on the previous studies, 2. Li2S5 has an odd number of sulfur atoms in lithium polysulfides, [29–31], 3. Li2S2 and Li2S incite the shuttle effect. Further to invoke solvent effects, Fukui functions and properties supporting RIET have been calculated in 1,2-Dimethoxyethane (DME) solvent, which is one of the electrolytes currently used in Li-S batteries.
Synthesis and characterization of graphene oxide capped sulfur/polyacrylonitrile composite cathode by simple heat treatment
Published in Journal of Sulfur Chemistry, 2019
K. Krishnaveni, R. Subadevi, M. Sivakumar, M. Raja, T. Prem Kumar
The sulfur cathode slurry was prepared by mixing S/PAN/GO composite, super P, and PVDF at a weight ratio of 7:2:1 inN-methyl-2-pyrrolidinone solvent. The slurry was then uniformly coated on an aluminum foil (20 μm) current collector and dried at 60 °C under vacuum overnight. CR2032-type coin cells were assembled in an argon-filled glove box (Braun Unilab), and the oxygen and water content were less than 1 ppm. The S/PAN/GO composite was used as a cathode and metal lithium as the anode. The electrolyte was 1 M lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) in 1, 3-dioxolane and 1,2-dimethoxyethane (volume ratio 1:1), including 0.05 M LiNO3 additive. The galvanostatic charge/discharge experiments were characterized by using a battery system (Arbin, USA) at room temperature. The CV tests were carried out at a scan rate of 0.1 mV s−1within the potential range of 1.6–3 V (Solartron, UK). The discharge capacities were calculated by the weight of sulfur in the cathode.
Synthesis and electronic structure of a series of first-row transition-metal pyrazine(diimine) complexes in two oxidation states
Published in Journal of Coordination Chemistry, 2022
Daniela Sanchez Arana, Jaylan R. Billups, Bruno Donnadieu, Sidney E. Creutz
The nickel(II) pyrazine(diimine) complex (DiPPPZDI)NiCl2 (3) was synthesized through reaction of the DiPPPZDI ligand with NiCl2(dme) (dme = dimethoxyethane) in THF, followed by recrystallization from dichloromethane, giving orange crystals. The 1H NMR spectrum covering the range from −4.4 to 15.4 ppm suggests that the resulting compound is paramagnetic, and the solution magnetic moment (Evans method) was determined to be 2.7 µβ, close to the spin-only value for an S = 1 complex.