互穿网络聚合物材料.ppt

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Enhanced Ionic Conductivity of Semi-IPN Solid Polymer Electrolytes Based on Star-Shaped Oligo(ethyleneoxy) cyclotriphosphazenes
By Kangbin Lin
Macromolecules 2012, 45, 7931 −7938
Dan He, Song Yun Cho Dong Wook Kim, Changjin Lee, and Yongku Kang*
Contents
Introduction
Synthetic routes
Results and discussion
Conclution
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Introduction
All-Solid-State Lithium Ion Battery
Higher safety
Higher energy density
Wider operating temperature
Long service life
Glassy sulfide electrolyte
PEO based
polymer electrolyte
LiPON thin film electrolyte
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Introduction
Migration mechanism of lithium ions
PEO and its derivatives
based polymer electrolyte
Low cost Good chemical stability
Sufficient flexibility Low size and weight
Low ionic conductivity
High crystallinity
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Synthetic routes
R
R
R
R
R
R
Cyclotriphosphazenes
(环三磷腈)
Ethyleneoxy groups
Vinyl/Acryl groups
Ionic conductivity
Network structure
High ionic conductivity
(Plasticizers)
(Cross-linker)
Sufficient mechanical strength
High flame resistance
Chemical and thermal stability
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Synthetic routes
Star-Shaped Cyclophosphazene Plasticizers
Liquid or gel-like material
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Synthetic routes
Star-Shaped Cyclophosphazene Cross-Linker
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Synthetic routes
Schematic Structure of Semi-IPN SPE
Cross-linker(PA6) Plasticizer(PMEn) Lithium salt Thermal initiator
In situ radical polymerization
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Synthetic routes
Formation of semi-IPN SPE
The semi-IPN SPE film
30 wt% of PA6 and 70 wt% of PMEn with LiSO3CF3, [EO]/[Li+] = 15
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Results and discussion
Temperature dependence
The effect of the molecular weight
DSC thermograms of the SPEs
30 wt% of PA6 and 70 wt% of PMEn with LiSO3CF3, [EO]/[Li+] = 15
The number of EO units