The polymer electrolyte based on polysiloxane containing both alkyl cyanide and oligo ethylene oxide pendants

Facile route to synthesis of functionalised poly(methylalkoxy)siloxane under mild and aerobic conditions in the presence of platinum catalysts

“…Graft copolymers containing oligo ethylene oxide side chains are an interesting group of copolymers due to their solution and surface properties as well as their ability to form phase-separated morphologies [27]. In order to prepare grafting polysiloxane containing oxy ethylene pendant, reaction of PMHS with 14a, 15a and 16a were examined in the presence of Karstedt's catalysts (Scheme 3).…”

Nitrile functionalized disiloxanes with dissolved LiTFSI as lithium ion electrolytes with high thermal and electrochemical stability

“…Organic dinitriles like adiponitrile and glutaronitrile were investigated by Abu-Lebdeh et al [23,24] and showed promising results, too, but exhibit a high melting point and are therefore unpractical for battery electrolytes at ambient temperatures. Polymer electrolytes based on highly cross-linked polysiloxanes functionalized nitrile side chains have already been studied, but suffer from low conductivities [21,22]. The concept of this work is to investigate nitrile functionalized disiloxanes as electrolyte solvents in combination with LiTFSI as alternative lithium ion electrolyte with enhanced safety.…”

Nitrile functionalized silyl ether with dissolved LiTFSI as new electrolyte solvent for lithium-ion batteries

“…Ether groups are electrochemically stable up to 4.2 V vs. Li/Li + which limits the application of the respective electrolytes [15]. Until now, moderate efforts have been done to enhance oxidation stability by partially substituting ether groups with more stable nitrile groups, but no complete substitution of ether groups has been tried yet [7,16]. In recent publications, we introduced a dinitrile-functionalized disiloxane solvent which showed high electrochemical and thermal stability as well as high ionic conductivities of dissolved lithium salts [1,2].…”