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