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Polymer Chemistry Vol - 8 Issue - 3

Polymer Chemistry Vol - 8 Issue - 2

Polymer Chemistry Vol -7

Polymer Chemistry Vol -6

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Polymer Chemistry Vol -2

Polymer Chemistry Vol -1

Single lithium-ion conducting poly(tetrafluorostyrene sulfonate) – polyether block copolymer electrolytes

Content Provider	Royal Society of Chemistry (RSC)
Author	Shao, Zhecheng Jannasch, Patric
Copyright Year	2017
Abstract	Solid single-ion conducting polymers continue to attract significant interest as electrolyte materials with great potential to improve safety and performance of energy storage devices. Still, their low conductivity is a significant hurdle presently preventing their application. Here, we report on highly conductive BAB triblock copolymers with A blocks of either poly(ethylene oxide) (PEO) or poly(ethylene oxide-co-propylene oxide) (PEOPO), and B blocks of poly(lithium 2,3,5,6-tetrafluorostyrene-4-sulfonate) (PPFSLi). The copolymers were readily synthesised by atom transfer radical polymerisation (ATRP) of 2,3,4,5,6-pentafluorostyrene from polyether macroinitiators, followed by quantitative thiolation using NaSH and subsequent oxidation to form the sulfonate anions. The copolymers possessed high thermal stability and their ionic content was conveniently controlled by the block ratio during the ATRP. Above the polyether melting point, PEO-based block copolymers with [O] : [Li] = [18] : [1] showed the highest conductivity, close to 1.4 × 10−5 S cm−1 at 60 °C, while at lower temperatures, the PEOPO materials reached the highest conductivity, nearly 1.5 × 10−6 S cm−1 at 20 °C. The high conductivity of the former copolymer suggests weak interactions of the lithium ions with the pentafluorosulfonate anions in combination with a high degree of Li+ dissociation facilitated by PEO. The results of the present study demonstrate that well-designed block copolymers containing lithium pentafluorostyrene sulfonate units can approach the levels of conductivity required for high-temperature lithium battery applications.
Starting Page	785
Ending Page	794
Page Count	10
File Format	HTM / HTML PDF
ISSN	17599954
Volume Number	8
Issue Number	4
Journal	Polymer Chemistry
DOI	10.1039/c6py01910b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Lithium battery Electrolyte Ether Ethylene Lithium Ethylene oxide Copolymer Dissociative NaSH
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics

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