Study of structure and properties of Supramolecular functionalized PEG (UPEG/UPEGU) system blended with multi-diamidopyridine modified POSS, and ionic conductivity properties of this system with LiAsF6 as polymer electrolyte for Li-ion batteries

Abstract

I. Most of today materials needs to be more than just a material. We put chips into everything, now we can install firmware even on toaster – so this is why it’s not enough for materials be just hard or soft. Today’s materials need to be smart. This is why more and more attention paid to supramolecular materials. We have synthesized uracil polyethylene oxide, double uracil polyethylene oxide and multi-diamidopyridine modified POSS, by the SN2 reaction, mechanism of nucleophilic substitution, and click 1,3-cycloadditional reaction, respectively. System with strong internal bounding was obtain after blending POSS with UPEG/UPEGU systems. The weight ratios of systems are from 1:9 to 9:1. Because of the excess amount of uracil groups, amount of hydrogen bonded groups in UPEGU/MD-POSS system is relative bigger, and the thermal properties are improved. Also, because of presents of double uracil groups, UPEGU/MD-POSS system has a well definite structure. II.We also indicated the properties of blending systems UPEG and UPEGU with LiAsF6. Weight ratios of PEG chain Oxygen to Lithium in prepared systems are 1:1, 2:1, 4:1, 8:1, 12:1, 16:1, 20:1, 24:1. Results show great improvement of the ionic conductivity for both systems. At 300C, the highest ionic conductivity of the UPEG/ LiAsF6 system is obtained to be 10-4 S/cm while that for UPEGU/LiAsF6 system is 10-5 S/cm.

I. Most of today materials needs to be more than just a material. We put chips into everything, now we can install firmware even on toaster – so this is why it’s not enough for materials be just hard or soft. Today’s materials need to be smart. This is why more and more attention paid to supramolecular materials. We have synthesized uracil polyethylene oxide, double uracil polyethylene oxide and multi-diamidopyridine modified POSS, by the SN2 reaction, mechanism of nucleophilic substitution, and click 1,3-cycloadditional reaction, respectively. System with strong internal bounding was obtain after blending POSS with UPEG/UPEGU systems. The weight ratios of systems are from 1:9 to 9:1. Because of the excess amount of uracil groups, amount of hydrogen bonded groups in UPEGU/MD-POSS system is relative bigger, and the thermal properties are improved. Also, because of presents of double uracil groups, UPEGU/MD-POSS system has a well definite structure. II.We also indicated the properties of blending systems UPEG and UPEGU with LiAsF6. Weight ratios of PEG chain Oxygen to Lithium in prepared systems are 1:1, 2:1, 4:1, 8:1, 12:1, 16:1, 20:1, 24:1. Results show great improvement of the ionic conductivity for both systems. At 300C, the highest ionic conductivity of the UPEG/ LiAsF6 system is obtained to be 10-4 S/cm while that for UPEGU/LiAsF6 system is 10-5 S/cm.