Decoupling of ionic transport from segmental relaxation in polymer electrolytes.
Decoupling of ionic transport from segmental relaxation in polymer electrolytes.
复制标题
聚合物电解质中离子传输与链段弛豫的解耦。
DOI：
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发表时间：
2012
影响因子：
8.6
通讯作者：
A. Sokolov
中科院分区：
文献类型：
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作者：
Yangyang Wang;A. Agapov;Fei Fan;K. Hong;Xiang Yu;J. Mays;A. Sokolov
本文详细研究了聚合物电解质中离子电导率与链段弛豫之间的关系。分析表明，离子电导率可以从链段动力学中解耦，解耦的强度与脆性相关，但与玻璃化转变温度无关。这些结果要求对聚合物电解质中离子传输的当前图像进行修订。我们所观察到的解耦现象的挫折，在包装的刚性聚合物，松散的局部结构也负责增加其脆弱性。
We present detailed studies of the relationship between ionic conductivity and segmental relaxation in polymer electrolytes. The analysis shows that the ionic conductivity can be decoupled from segmental dynamics and the strength of the decoupling correlates with the fragility but not with the glass transition temperature. These results call for a revision of the current picture of ionic transport in polymer electrolytes. We relate the observed decoupling phenomenon to frustration in packing of rigid polymers, where the loose local structure is also responsible for the increase in their fragility.