Issue 24, 2015

High performance composite polymer electrolytes for lithium-ion polymer cells composed of a graphite negative electrode and LiFePO4 positive electrode

Abstract

Core–shell structured SiO2 particles with different core diameters were synthesized by radical polymerization of 4-styrenesulfonic acid sodium salt with vinyl-functionalized SiO2 core particles and were used as Li+ ion-conducting fillers in composite polymer electrolytes. Composite polymer electrolytes prepared with core–shell SiO2 particles exhibited high ionic conductivity exceeding 10−3 S cm−1 at room temperature and good mechanical properties, allowing the preparation of a free-standing film with a thickness of 30 μm. Lithium-ion polymer cells composed of graphite negative electrode, composite polymer electrolyte and LiFePO4 positive electrode were assembled, and their cycling performance was evaluated. Cells assembled with a composite polymer electrolyte containing core–shell SiO2 particles with a core diameter of 250 nm exhibited good cycling performance in terms of discharge capacity, capacity retention and rate capability.

Graphical abstract: High performance composite polymer electrolytes for lithium-ion polymer cells composed of a graphite negative electrode and LiFePO4 positive electrode

Article information

Article type
Paper
Submitted
04 déc. 2014
Accepted
05 févr. 2015
First published
11 févr. 2015

RSC Adv., 2015,5, 18359-18366

Author version available

High performance composite polymer electrolytes for lithium-ion polymer cells composed of a graphite negative electrode and LiFePO4 positive electrode

Y. Lee, W. Shin, J. S. Kim and D. Kim, RSC Adv., 2015, 5, 18359 DOI: 10.1039/C4RA15767B

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