| 引用本文: | 刘辉,崔新宇,顾大明,肖雪.PEO基聚合物电解质的制备[J].哈尔滨工业大学学报,2014,46(10):124.DOI:10.11918/j.issn.0367-6234.2014.10.021 |
| LIU Hui,CUI Xinyu,GU Daming,XIAO Xue.Preparation of PEO matrix polymer electrolyte[J].Journal of Harbin Institute of Technology,2014,46(10):124.DOI:10.11918/j.issn.0367-6234.2014.10.021 |
|
| 摘要: |
| 为采用蒸馏水替代有机溶剂溶解PEO,减轻对空气的污染,改善由于有机溶剂挥发较快使得聚合物膜易裂的缺点,采用溶液浇铸法,首次以蒸馏水为溶剂溶解PEO,以纳米SiO2为填料,锂盐采用LiClO4,制备出复合聚氧化乙烯基电解质PEO-LiClO4-SiO2,并对纳米SiO2的作用进行分析．采用SEM、XRD和交流阻抗法等测试方法对PEO基复合电解质的微观形貌、晶体结构和相关电化学性能等进行表征．结果表明:添加纳米填料后,PEO聚合物电解质的结晶度下降,拉伸强度增加．PEO-LiClO4-SiO2(6％)聚合物电解质的电化学稳定窗口为4.8 V,离子电导率(25 ℃)为3.95×10-5S·cm-1,离子迁移数为0.29． |
| 关键词: 聚合物电解质 电化学性能 纳米SiO2 聚氧化乙烯 |
| DOI：10.11918/j.issn.0367-6234.2014.10.021 |
| 分类号:O641； TM912.9 |
| 基金项目:哈尔滨市学科带头人基金资助项目(2007RFXXG014); 黑龙江工程学院青年科学基金项目(2013qj15). |
|
| Preparation of PEO matrix polymer electrolyte |
|
LIU Hui1, CUI Xinyu2, GU Daming3, XIAO Xue1
|
|
(1. School of Materials and Chemical Engineering, Heilongjiang Institute of Technology, 150050 Harbin, China; 2. School of Public Health, Mudanjiang Medical University, 157011 Mudanjiang, Heilongjiang, China; 3. Dept. of Chemistry, Harbin Institute of Technology, 150001 Harbin, China)
|
| Abstract: |
| The method by using distilled water to replace organic solvents to dissolve PEO is simple and the air pollution caused by organic solvents volatilizing will be avoided. The PEO-LiClO4-SiO2 polymer electrolyte is prepared by solution-casting method, in which the water is as solvent, the nanometer SiO2is inorganic filler and the lithium salt is LiClO4. The effect of nano SiO2 particles is analyzed. The micro-morphology, crystal structure and electrochemical properties of the electrolyte are characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) and electrochemical impedance spectra (EIS). The results show that the crystallinity of PEO polymer electrolyte is decreased and the tensile intensity is increased when nanometer SiO2particles are doped in the polymer electrolyte. The electrochemical stability window is 4.8 V, the highest ionic conductivities (25 ℃) of PEO-LiClO4-SiO2(6％) polymer electrolyte is 3.95×10-5S·cm-1and the ionic transference number is 0.29. |
| Key words: polymer electrolyte electrochemical property nanometer SiO2 PEO |
