Spectroscopic and structural studies on phenyl and pentafluorophenyl trifluorothioacetate, and pentafluorophenyl trifluoroacetate, CF₃C(O)SC₆H₅, CF₃C(O)SC₆F₅ and CF₃C(O)OC₆F₅

Abstract

Phenyl and pentafluorophenyl trifluorothioacetate, CF3C(O)SC6H5 and CF3C(O)SC6F5, were prepared by condensation of CF3C(O)Cl and the corresponding mercaptan RSH under vacuum conditions. The compounds were isolated and properly characterized by using...

Pentafluorobenzene boronic acid with strong Lewis acidity for the modification of PEO-based polymer electrolytes

“…The -C 6 F 5 group has a strong electron-withdrawing effect and may endow B atoms with strong Lewis acidity, good stability, large dielectric anisotropy, and high affinity with F atoms of the TFSI − anion. [26][27][28] Moreover, PFBBA is expected to in situ form a more stable B-containing SEI layer on the Li surface, promote uniform Li deposition, and suppress possible side reactions. We systematically evaluated the effect of PFBBA on the electrochemical parameters in the PEO-LiTFSI SSEs and studied the modication mechanism using experimental and computational methods.…”