引用本文:
潘春跃, 巢猛, 王小花, 戴潇燕. 偶联剂原位改性SiO2提高PEO/LiClO4/SiO2电导率[J]. 应用化学,
2006, 23(6): 663-667.
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.
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.
偶联剂原位改性SiO2提高PEO/LiClO4/SiO2电导率
摘要:
以聚环氧乙烷/高氯酸锂络合物(PEO/LiClO4)为基体,前驱体正硅酸乙酯(TEOS)在基体中水解缩合的同时加入偶联剂KH560改性原位生成的SiO2,制备了PEO/LiClO4/KH560-SiO2聚电解质膜,采用SEM、AFM、DSC和交流阻抗方法研究了改性前后聚电解质膜的表面形貌、结晶度和电导率。结果表明,改性SiO2在PEO中分散均匀且粒径仅为35 nm,不同SiO2含量下改性后的聚电解质膜电导率均比改性前明显提高。当SiO2质量分数为10%时,PEO/LiClO4/KH560-SiO2的电导率达到最大值4.8×10-5 S/cm(30℃)。
English
Conductivity Enhancement of (PEO)8LiClO4-SiO2 by In-situ SiO2 Modification
Abstract:
(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.
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Key words:
- PEO
- / polymer electrolyte
- / coupling agent
- / SiO2
- / conductivity
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