Poly(ethylene oxide)-LiN(SO[sub 2]CF[sub 2]CF[sub 3])[sub 2] Polymer Electrolytes

Abstract

The present report describes the investigation performed on the interface established between lithium metal and poly(ethylene oxide) (PEO)-lithium bis(perfluoroethysulfonyl)imide (LiBETI), normalLiNfalse(SO2CF2CF3)2 polymer electrolytes. The studies were performed as a function of the polymer electrolyte salt concentration and temperature both in rest and in kinetic conditions by means of impedance measurements and galvanostatic tests, respectively. © 2002 The Electrochemical Society. All rights reserved.

Effect of Anion Size on Conductivity and Transference Number of Perfluoroether Electrolytes with Lithium Salts

“…24,25 The interfacial impedance of lithium metal and PEO (MW = 4000 kg/mol) with LiBETI was measured by Appetecchi, G. B. et al 26 They report a minimum of 80 cm 2 27 The values of R i reported in our study for LiFSI/PFE systems are thus similar to those of LiFSI/PEO, and significantly lower than that of LiTFSI/PEO. The interfacial resistances that were measured in the PEO electrolytes in References 26 and 27 were obtained without the passage of current.…”

FT-Raman spectroscopy study on the effect of ceramic fillers in P(EO)LiBETI

“…This result is in a good agreement with previous reports which have indicated that there are no significant changes in the degree of ionic association resulting from the addition of inorganic fillers to polymer electrolytes [23][24][25]. In addition, the spectra agree with previously performed ionic conductivity [28,44] and pfg-NMR [45] measurements on solvent-cast and hot-pressed P(EO) 20 LiBETI polymer electrolyte containing SiO 2 (7 and 12 nm) and g-LiAlO 2 . The ionic conductivity of these electrolytes was shown to differ only slightly (see Table 1) and the Li + diffusion coefficient is essentially the same for the filler-free and 10 wt.% SiO 2 -P(EO) 20 LiBETI electrolytes, particularly at Tz80 8C.…”

Ternary polymer electrolytes containing pyrrolidinium-based polymeric ionic liquids for lithium batteries

“…Scan rate: 0.5 mV s −1 . commonly observed in solvent-free polymer electrolytes [47][48][49], is due to the reaction between the lithium electrode and the polymer electrolyte to form a passive layer (SEI) [36] onto the lithium anode that protects the electrode from further reaction. At 40 • C the interfacial resistances decrease about one order of magnitude Table 3 Electrolyte bulk resistance (R b ), charge transfer resistance (Rct) and passive layer resistance (Rp) values for a PIL-LiTFSI-PYR14TFSI ternary polymer electrolyte (set C) in contact with a lithium anode at different storage times and temperatures.…”