Characterization of solid polymer electrolytes based on poly(trimethylenecarbonate) and lithium tetrafluoroborate

Abstract

The results of an investigation of a polymer electrolyte system based on the poly(trimethylene carbonate) host matrix, designated as p(TMC), with lithium tetrafluoroborate guest salt are described in this presentation. Electrolytes with lithium salt compositions with n between 3 and 80 (where n represents the number of (O=COCH 2 CH 2 CH 2 O) units per lithium ion) were prepared by co-dissolution of salt and polymer in anhydrous tetrahydrofuran. The homogeneous solutions obtained by this procedure were evaporated, within a preparative glovebox and under a dry argon atmosphere, to form thin films of electrolyte. The solvent-free electrolyte films produced were obtained as very flexible, transparent, completely amorphous films and were characterized by measurements of total ionic conductivity, cyclic voltammetry, differential scanning calorimetry and thermogravimetry.

Synthesis and electrochemical characterization of aPEO-based polymer electrolytes

“…At about 55°C, this electrolyte presents the highest conductivity of all the samples investigated (7.66×10 −5 S cm −1 ) and at ambient temperature the ionic conductivity presented is approximately 2.10 × 10 −5 S cm −1 . These results are comparable with those reported by Chiodelli et al [18] and Armand et al [22] for the PEO n LiBF 4 system and by Silva et al [21] based on the p(TMC) host matrix.…”

“…A similar observation was previously reported for other systems based on aPEO with guest LiClO 4 salt [20]. This variation was different from that previously observed in studies of an electrolyte based on the PEO host matrix and p(TMC) host matrix with the same guest salt [21]. In these systems T g decreased with increasing salt content.…”

Gelatin-based protonic electrolyte for electrochromic windows

“…Nevertheless, the size, transmittance, reflectance, color/bleaching cycles, and switching time data of ECDs investigated have been reported by Granqvist et al [3] and Heusing and Aegerter [4]. ECDs with solid state electrochromic and counter electrode thin coatings have been built with various electrolytes, such as all-inorganic solid state materials [5], organic-based compound materials [6], or hybrid-based systems [7], all of them containing mobile lithium or proton charge species [8]. Lithium salts, usually LiClO 4 , are preferably used in the last two cases.…”

1H NMR, thermal, and conductivity studies on PVAc based gel polymer electrolytes

“…Similar results have also been previously reported by M. M. Silva et al and G. Chiodelli et al, for the poly(trimethylenecarbonate) with LiBF 4 and PEOLiBF 4 polymer electrolytes respectively. 21,22 The plasticized samples have lower values of T g than the plasticizer free sample because of a reduction in the cohesive forces of attraction between polymer chains. 23 Plasticizer molecules penetrate into the polymer matrix and establish attractive forces between plasticizer molecules and the chain segments.…”