Relation between glass transition and melting of PEO–salt complexes

Preparation and characterization of composite electrolytes based on PEO(375)-grafted fumed silica

“…Thus, the presence of residual water in the films plasticizes them, resulting in a drop in T g . Previously reported T g s for SiO 2 /PEO electrolytes ranged from − 45 to − 30° [27,56]. Addition of filler increased T g s in these PEO electrolytes from − 49°C (no filler with LiN(CF 3 SO 2 ) 2 ) to − 47°C (8% SiO 2 heated at 100°C) and − 46°C (8% SiO 2 calcined at 900°C), and also from −46°C (no filler with LiClO 4 ) to −38°C (8% SiO 2 heated at 100°C) and −35°C (8% SiO 2 calcined at 900°C) at the same salt concentration (O/Li = 8/1) [27].…”

Conductivity, thermal and infrared studies on plasticized polymer electrolytes with carbon nanotubes as filler

“…This provides more effective paths for the migration of conductivity ions. Moreover, the nano-size αCNTs improve the OH stretching [37] conduction of mobile ions due to their extremely high surface energy [58][59][60][61][62][63]. This prevents local PEO chain re-organization which results in freezing at ambient temperature and a high degree of disorder.…”

The effects of SiO 2 and TiO 2 nanofillers on structural and electrochemical properties of poly(ethylene oxide)–EMIHSO 4 electrolytes

“…observed an increase in crystallinity, but found no correlation between crystallinity and glass transition or melting temperatures [20,21].Studies were also conducted on the nanofillers in amorphous polymer electrolytes where these changes in crystallinity were not an issue. Best et al attributed the increase in conductivity of an amorphous trifunctional polyether with both LiClO 4 and LiTfto the influence of Al 2 O 3 and TiO 2 on the mobility of the ionic species [22].…”