High performance composite polymer electrolytes for lithium-ion polymer cells composed of a graphite negative electrode and LiFePO4 positive electrode
- Authors
- Lee, Yoon-Sung; Shin, Won-Kyung; Kim, Jung Soo; Kim, Dong-Won
- Issue Date
- Feb-2015
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.5, no.24, pp.18359 - 18366
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC ADVANCES
- Volume
- 5
- Number
- 24
- Start Page
- 18359
- End Page
- 18366
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/157936
- DOI
- 10.1039/c4ra15767b
- ISSN
- 2046-2069
- 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 mu m. 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.
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