Tuning the glass transition of siloxane-based poly(ionic liquid)s towards high ion conductivity

Reiter, ManuelStockholms universitet,Institutionen för material- och miljökemi (MMK),Technische Universität Wien, Austria (author)

Herein, we report a simple and versatile synthetic approach towards siloxane-based poly(ionic liquid)s (PILs) with unusually low glass transition temperatures (Tg) down to −73°C, and thus “liquid-like” behavior at room temperature. We designed a polydimethylsiloxane-derived copolymer carrying dialkylimidazolium moieties, and by careful selection of the side-chain length and the type of anions we were able to manipulate its Tg over a wide range and reach high ionic conductivities (σDC) up to 4.8 × 10−5 S/cm at 300 K. The ionized species make up only a minor fraction (<25 mol%) of the overall repeating units and are supposedly randomly distributed: Yet our results indicate dramatic effects on the thermal properties due to repulsive interactions between ionic and non-ionic segments.

Anton, Arthur Markus (author)
Chang, JianStockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)jich2941 (author)
Kremer, Friedrich (author)
Unterlass, Miriam M. (author)
Yuan, JiayinStockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)jiyu0266 (author)
Stockholms universitetInstitutionen för material- och miljökemi (MMK) (creator_code:org_t)

By the author/editor: Reiter, Manuel; Anton, Arthur Ma ...; Chang, Jian; Kremer, Friedric ...; Unterlass, Miria ...; Yuan, Jiayin

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