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Citation: PAN Chun-Yue, CHAO Meng, WANG Xiao-Hua, DAI Xiao-Yan. Conductivity Enhancement of (PEO)₈LiClO₄-SiO₂ by In-situ SiO₂ Modification[J]. Chinese Journal of Applied Chemistry, ;2006, 23(6): 663-667. shu

Conductivity Enhancement of (PEO)₈LiClO₄-SiO₂ by In-situ SiO₂ Modification

1.
Institute of Chemistry and Engineering, Central South University, Changsha 410083

Corresponding author: PAN Chun-Yue,
Received Date: 1 August 2005
Available Online: 15 January 2006

(PEO)₈LiClO₄-modified SiO₂ composite polymer electrolyte was prepared by the reaction of Si(OC₂H₅)₄ in (PEO)₈LiClO₄) matrix and simultaneous modification of SiO₂ by silane-coupling agent KH560.The morphology and ionic conductivity of the polymer electrolytes were investigated by means of SEM,AFM,DSC and A.C.impedance spectroscopy.The results showed that the modified SiO₂ particles with the sizes of 35 nm were dispered uniformly in PEO matrix.Compared with unmodified SiO₂,the addition of modified SiO₂ in (PEO)₈LiClO₄ polymer electrolyte effectively leads to higher enhancement in ionic conductivity.When mass ratio of SiO₂ reaches 10%,a maximum conductivity of 4.8×10^-5 S/cm could be achieved.
- PEO,
- polymer electrolyte,
- coupling agent,
- SiO₂,
- conductivity
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Conductivity Enhancement of (PEO)₈LiClO₄-SiO₂ by In-situ SiO₂ Modification