Marques Mota, Filipe published the artcileRevisiting Solvent-Dependent Roles of the Electrolyte Counteranion in Li-O2 Batteries upon CO2 Incorporation, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is revisiting solvent dependent roles electrolyte counteranion lithium oxygen battery.
Lithium-oxygen batteries are promising next-generation high-energy storage candidates. Replacing pure O2 with air and uncovering moisture and CO2-contamination effects on the O2 electrochem., however, represent necessary steps toward commercialization. Representatively, a CO2-induced shift toward Li2CO3 formation has been systematically disclosed in a number of electrolyte solvents. Here, we show that in tetraglyme only Li2CO3 is formed without Li2O2. Using explicit theor. calculations, we reveal that discharge is governed by the strong chelation effect induced by oxygen lone electron pairs of the glyme, which emphasizes the importance of assessing direct interat. interactions between Li+ and solvent mols. when determining preferred reaction pathways in these O2/CO2 systems. The choice of the electrolyte counteranion investigated here for the first time, however, has no apparent effect on the O2/CO2 electrochem., leading to Li2CO3. Galvanostatic results and product analysisnonetheless reveal that highly dissociated Li+ counteranions in tetraglyme favorably stabilize soluble peroxocarbonate reaction intermediates during discharge, whereas highly associated salts accelerate Li2CO3 precipitation, dramatically narrowing the cell capacity. Importantly, these observations are also distinct from prior conclusions from rationally designed electrolytes under pure O2 conditions and emphasize the need to revisit established correlations between uncovered counteranion···Li+···solvent interaction degrees and the balance between mechanistic pathways in practical Li-air devices.
ACS Applied Energy Materials published new progress about Battery electrolytes. 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