Electrolytes based on LiClO4 and branched PEG–boronate ester polymers for electrochromics

Polymer Electrolytes Based on Borane/Poly(ethylene glycol) Methyl Ether for Lithium Batteries

“…All the samples show a peak located at 3400 cm −1 which corresponds to the absorption of hydroxyl units. It is clearly shown that disappearance of this peak illustrates highest transformation of the hydroxyl groups into borate esters [21]. In addition, strong bands at 2910-2870 cm −1 due to C-H stretching of the polymer electrolytes and weaker peaks located around 667 cm −1 belong to B-O units [25,26].…”

“…They have inserted a Lewis acid in the branched structure of a poly(ethylene oxide) (PEO) and then the transfer of species between the electrolyte and the electrode is improved as a result of ion-pairing in the electrolyte [18,19]. Lewis acid boron and Lewis-base oxygen interact with both cations and anions in the electrolytes and contribute to the ion-pairing in the electrolytes [20][21][22][23]. Borane or borate derivatives can also improve the thermal stability of the electrolytes [24].…”

Nanocomposite polymer electrolytes comprising PVA-graft-PEGME/TiO2 for Li-ion batteries

“…28 The spectra of PEGME contain a peak at 3400 cm À1 , which corresponds to the absorption by hydroxyl units. 26 They also show strong bands at 2960-2800 cm À1 due to C-H stretching. 29 In the spectrum of pure TiO 2 , the peaks at 550 and 1479 cm À1 show stretching vibration of Ti-O and Ti-O-Ti, respectively.…”

“…20 Mehta and Fujinami 21,22 have produced polymers by the condensation reaction of boron trioxide and poly(ethylene glycol)s. Recently, several studies on electrolytes based on boron chemistry have been studied, indicating an increasing interest for electrolytes containing Lewis acids. [23][24][25][26][27] In our previous works, boron comprising grafted and crosslinked polymers was synthesized by using BH 3 /THF to link different PVAs, PEGMEs, and poly(ethylene glycol)s. The resulting different polymer matrices were doped with trifluoromethane sulfonate (CF 3 SO 3 Li) at several stoichiometric ratios to get ion conductive PEs for Li-ion batteries. 28 Homogeneous, jel, and thermally stable materials were obtained.…”

Synthesis and characterization of lithium-salt complexes with difluoroalkoxyborates for application as lithium electrolytes

“…Spectral analysis of the decomposition products showed that along with the main product, up to 12% percent of trialkoxyborate was formed; this side product could be used together with the main product and separation was not necessary. Some investigators have used such derivatives as additives to the electrolytes in order to complex the lithium salts [35,41].…”