Synthesis and characterization of UV-curedpoly(siloxane-urethane) elastomers containing ­polyethylene oxide segments – as potential membrane materials

UV-Cured Poly(Siloxane-Urethane)-Based Polymer Composite Materials for Lithium Ion Batteries—The Effect of Modification with Ionic Liquids

“…Obviously, the main effect of IL was to increase the amorphous phase content, leading to considerable increase in PEO chain flexibility [41,79,80]. In the PSUR-based UV-cured composites described in our paper, this effect was even enhanced by the presence of a silicone phase that also decreased significantly the crystallinity level of PEO, as confirmed by us earlier [1], so the PEO melting point was actually absent in DSC patterns-see In this structure that was similar to the structure observed for composite films obtained using EC/DMC as solvent for both prepolymer and lithium salt [2] the silicone domains were much smaller (0.1-3 µ), and some of them contained also tiny domains of the PEO-based phase. It is worth noting that this composite showed reasonably good specific conductivity-in the range of 2 × 10 −3 Scm −1 when DMC was used for wetting the film and surprisingly good specific conductivity-in the range of 1 × 10 −4 Scm −1 when IL was used for that purpose.…”

“…It appeared possible to obtain EC/DMC solvent-free composite films potentially suitable as separators for lithium ion batteries showing specific conductivity in the range of 10 −3 -10 −4 Scm −1 by in-situ modification of UV-cured PSUR containing lithium salts with ILs. Like the UV-cured PSUR composites containing EC/DMC solvent described in our earlier paper [2], the IL-modified composites investigated in the current study also showed two-phase morphology, where the silicone part of the composite formed well-defined domains embedded in the continuous PEO-based phase. The size of the silicone domains was much bigger (ca.…”

“…Dumbbell-shaped specimens (62 × 10 mm) for testing the mechanical properties (Instron testing machine, Instron, High Wycombe, UK, 50 mm/min pulling rate) and round-shaped specimens (10 mm diameter) for solubility experiments were cut from the films obtained as described in Section 2.2.2. In solubility experiments, the specimens were immersed in toluene for 24 h, dried at 30 • C until there was no weight change, and percentage of fraction soluble in toluene (TSF) was determined from Equation (2).…”

“…Studies on the synthesis and characterization of poly(siloxane-urethane)s (PSURs) containing poly(ethylene oxide) (PEO) segments as potential polymer composite materials for application in lithium ion batteries were conducted in the past in the authors' laboratory, and both moisture-cured and UV-cured PSUR systems were investigated [1,2]. In this paper, the results of studies on using ionic liquids (ILs) as modifiers for such UV-cured PSUR composite materials that at the same time could play the role of separators and gel polymer electrolytes in lithium ion batteries are described.…”

Siloxane‐Based Organosilicon Materials in Electrochemical Energy Storage Devices

“…Luckily, membranes functionalized by specifically structured siloxane have shown potential to settle these problems and deliver enhanced performances. POSS can be used in the construction of the nano‐microstructure or surface modification of PE separators, which not only restrain the electrode polarization and lithium dendrites but also endow the metallic lithium cells higher safety, better rate capability, and longer cycling life [31a, 35] . For example, a ZrO 2 /POSS‐modified PE separator enhanced the electrolyte uptake and weakened the solvation effect of lithium ions, which was beneficial to higher Li + transference number, ionic conductivity, and electrolyte/Li interfacial stability (Figure 3).…”