Effect of nano-porous Al2O3 on thermal, dielectric and transport properties of the (PEO)9LiTFSI polymer electrolyte system
Effect of nano-porous Al2O3 on thermal, dielectric and transport properties of the (PEO)9LiTFSI polymer electrolyte system
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DOI：
10.1016/s0013-4686(02)00243-8
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发表时间：
2002-08-05
影响因子：
6.6
通讯作者：
Mellander, BE
中科院分区：
文献类型：
--
作者：
Jayathilaka, PARD;Dissanayake, MAKL;Mellander, BE
已经对（PEO）（9）LiTFSI+10 wt.% Al2O3纳米多孔聚合物电解质体系。据观察，由于具有不同表面基团的填料颗粒的存在，电导率大幅提高。发现具有酸性基团的填料颗粒的增强效果最高，其次是碱性、中性和弱酸性。结果表明，填料颗粒不直接与聚（乙烯）氧化物（PEO）链相互作用，表明主链动力学的离子传输没有显着影响，由于填料。结果是一致的想法，即导电性增强是由于创建额外的网站和有利的传导途径，通过刘易斯酸碱型之间的相互作用的填料表面基团和离子物种的离子传输。这反映为迁移率的增加，而不是电荷载流子数量的增加。一个定性模型已被提出来解释的结果。(C)2002爱思唯尔科技有限公司版权所有。
Thermal, electrical conductivity and dielectric relaxation measurements have been performed on (PEO)(9)LiTFSI+10 wt.% Al2O3 nano-porous polymer electrolyte system. It is observed that the conductivity enhances substantially due to the presence of the filler particles with different surface groups. The highest enhancement is found for the filler particles with acidic groups followed by basic, neutral, and weakly acidic. The results reveal that the filler particles do not interact directly with poly(ethelene) oxide (PEO) chains indicating that the main chain dynamics governing the ionic transport has not significantly affected due to the filler. The results are consistent with the idea that the conductivity enhancement is due to the creation of additional sites and favourable conduction pathways for ionic transport through Lewis acid-base type interactions between the filler surface groups and the ionic species. This is reflected as an increase in the mobility rather than an increase in the number of charge carriers. A qualitative model has been proposed to explain the results. (C) 2002 Elsevier Science Ltd. All rights reserved.