Sol-gel derived Li+-doped poly(ε-caprolactone)/siloxane biohybrid electrolytes
Electrolytes based on a poly(ε-caprolactone) (PCL)/siloxane organic/inorganic host framework doped with lithium triflate (LiCF3SO3) were synthesised through the sol-gel process. In this biohybrid matrix short PCL chains are covalently bonded via urethane linkages to the siliceous network. Samples wi...
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| Other Authors: | , , , , , , |
| Format: | article |
| Language: | eng |
| Published: |
2006
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| Subjects: | |
| Online Access: | http://hdl.handle.net/1822/1823 |
| Country: | Portugal |
| Oai: | oai:repositorium.sdum.uminho.pt:1822/1823 |
| Summary: | Electrolytes based on a poly(ε-caprolactone) (PCL)/siloxane organic/inorganic host framework doped with lithium triflate (LiCF3SO3) were synthesised through the sol-gel process. In this biohybrid matrix short PCL chains are covalently bonded via urethane linkages to the siliceous network. Samples with salt composition n (molar ratio of PCL repeat units per Li+ ion) ranging from ∞ to 0.5 were investigated. All the ormolyte materials analysed are amorphous. Xerogels with n > 0.5 are thermally stable up to about 300°C. The most conducting ormolyte of the series is that with n = 0.5 (1.6×10−7 and 3.2×10−5 Ω−1 cm−1 at 25 and 100°C, respectively). This sample is electrochemically stable between −1 and 6 V versus Li+. |
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