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A gel polymer electrolyte based on initiator-free photopolymerization for lithium secondary batteries

Title
A gel polymer electrolyte based on initiator-free photopolymerization for lithium secondary batteries
Authors
Ryou, Myung-HyunLee, Yong MinCho, Kuk YoungHan, Gi-BeomLee, Je-NamLee, Dong JinChoi, Jang WookPark, Jung-Ki
DGIST Authors
Lee, Yong Min
Issue Date
2012-01
Citation
Electrochimica Acta, 60, 23-30
Type
Article
Article Type
Article
Keywords
ThiolAcrylatePhotopolymerizationGel polymer electrolyte (GPE)Lithium secondary batteriesCROSS-LINKINGION BATTERYINTERFACIAL ENHANCEMENTMECHANICAL-PROPERTIESNONWOVEN MATRIXNETWORK POLYMERPVDFMEMBRANESSYSTEMCELLS
ISSN
0013-4686
Abstract
Highly ion-conductive gel polymer electrolyte (GPE) with mechanical flexibility is developed by incorporating liquid electrolyte into polymer films that are fabricated by initiator-free photopolymerization of poly(ethylene glycol) dimethacrylate (acrylate monomer) and pentaerythritol tetrakis (3-mercaptopropionate) (thiol monomer) blend. When UV is irradiated on the blend, the thiol monomers themselves produce radicals to initiate the polymerization. GPEs with 40-50 wt.% of thiol monomer content show mechanically free standing characteristics with sufficient flexibility. The ionic conductivity of the GPE reaches1.1 × 10 -3 S cm -1 at 25 °C and is thus high enough to be applied for lithium secondary batteries. The GPE is electrochemically stable up to 4.4 V versus Li/Li + and the unit cells consisting of LiCoO 2/GPE/lithium metal show good cycling performance. This GPE is thus considered a good electrolyte candidate for future flexible and wearable lithium secondary batteries. © 2011 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/6491
DOI
10.1016/j.electacta.2011.10.072
Publisher
Pergamon Press Ltd.
Related Researcher
Files:
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Collection:
Department of Energy Science and EngineeringBattery Materials & Systems LAB1. Journal Articles


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