A star-shaped single lithium-ion conducting copolymer by grafting a POSS nanoparticle

Author: Cao, P.-F.; Wojnarowska, Z.; Hong, T.; Carroll, B.; Li, B.; Feng, H.; Parsons, L.; Wang, W.; Lokitz, B.S.; Cheng, S.; Bocharova, V.; Sokolov, A.P.; Saito, T.

Description: Single-ion conducting polymer electrolytes (SCPE) are attractive candidates for high-performance energy storage devices. A star-shaped single lithium-ion conducting polymer electrolyte was synthesized by combining the “grafting to” and “grafting from” strategy utilizing a polyhedral oligomeric silsesquioxane (POSS) nanoparticle as the core. Carboxylic acid terminated polyethylene oxide (PEO) and Reversible Addition Fragmentation Chain Transfer Agent (RAFT-CTA) were attached to the POSS nanoparticle to form a POSS-cored macro RAFT CTA (PMR-CTA). The PMR-CTA was used to mediate the polymerization of potassium (styrene-4-sulfonyltrifluoromethyl-sulfonyl)imide (STF-K+) and subsequent counter ion exchange resulted in a star-shaped single lithium-ion conducting copolymer (SSCP-Li+). The grafting ratio of poly(STF-Li+) and PEO per POSS nanoparticle can be tuned by modifying the feed ratio of the two polymer components. The synthesized star-shaped SCPE-Li+ are characterized by 1H NMR, FT-IR, UV-Vis, DLS, GPC and DSC, and their ionic conductivity is studied by broadband dielectric spectroscopy. The obtained results are compared to a conventional linear homopolymer poly(STF-Li+) and block copolymer PEO-b-poly(STF-Li+), and reveal a significant “decoupling” of ion conductivity from segmental dynamics for all of the studied SCPE-Li+. Blending extra PEOs with SCPE-Li+ was also performed to improve the ionic conductivity.

Subject Headings: polymer electrolyte; POSS; single-ion conducting; star-shaped; dc conductivity

Keywords: a star-shaped single lithium-ion conducting copolymer by grafting a POSS nanoparticle

Publication year: 2017

Journal or book title: Polymer

Volume: 124

Issue:

Pages: 117-127

Find the full text : https://www.sciencedirect.com/science/article/pii/S003238611730719X

Find more like this one (cited by): https://scholar.google.com/scholar?cites=10242146412332427126&as_sdt=1000005&sciodt=0,16&hl=en

Type: Journal Article

Serial number: 2514