Polymer Bulletin
Volume 47, Number 2, 167-174, DOI: 10.1007/s002890170008

Lithium sulfonated styrene oligomer (LiSSO) as a new class of lithium salt for polymer electrolytes

Young-Gi Lee, Chul-Hwan Kim, Jung-Ki Park and Do-Young Seung

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Abstract

A new class of lithium salt with single-ionic characteristics, lithium sulfonated styrene oligomer (LiSSO) [(CH2CHC6H5)7-(CH2CHC6H4SO3 −Li+)2], was synthesized and its complex with poly(ethylene oxide) (PEO) was prepared. The maximum ionic conductivity of the PEO/LiSSO complex at 65°C was 2.1×10−4S/cm at a salt concentration of [Li+]/[EO] = 0.20. The lithium cationic transference number (t +) of the PEO/LiSSO complex was found to be 0.95, and the polymer electrolyte was electrochemically stable up to 6.2V.
Received: 2 April 2001/Revised version: 30 July 2001/Accepted: 30 July 2001

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