摘要
以聚氧化乙烯/LiClO4为聚合物固体电解质(SPE)模型化合物,采用广义二维相关分析红外光谱技术,系统地研究了常温及时间扰动条件下SPE中锂离子载流子在外电场作用下的传输行为。在610～660及1060～1160cm-1范围内的二维相关红外光谱研究结果表明,锂离子在外电场作用下的迁移过程伴随与ClO4-1及C—O—C大分子配体的解配位及再配位相互作用,且这种解配位与再配位主要是通过与SPE内的ClO4-1及PEO大分子配体中的C—O—C作用来实现。SPE中ClO4-1离子及PEO大分子配体在电场作用下将由弱配位状态优先转变为紧密配位状态。
Dynamic information regarding coordination and dissociation effects deriving from the migration of ions in poly （ethylene oxide）10：LiClO4 electrolyte under an external DC electric field has been studied by a generalized two- dimensional correlation Fourier transform infrared spectroscopy （2D FTIR COS） at 30℃. The results show that the migration of both lithium cations and ClO4 anions is a complicated process coupling the change of both the form and appearance sequence of carriers under the electric field, which is apparently different from that without electric field. The ionic conduction of the electrolyte under the electric field can be divided into the dissociation of coordinated ions and the diffusion of free carriers, and the activation energy of dissociation （El） and diffusion （Ed） is the function of perturbation and forms of ligands.
出处
《高分子通报》
CAS
CSCD
北大核心
2013年第9期184-190,共7页
Polymer Bulletin
基金
国家自然科学基金(项目批准号:21204076)
