A Systematic Study of Vinyl Ether-Based Poly(Ethylene Oxide) Side-Chain Polymer Electrolytes,ACS Applied Polymer Materials

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A Systematic Study of Vinyl Ether-Based Poly(Ethylene Oxide) Side-Chain Polymer Electrolytes
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2021-02-09 , DOI: 10.1021/acsapm.0c01398
Andreas J. Butzelaar ₁ , Kun L. Liu ₂ , Philipp Röring ₂ , Gunther Brunklaus _{2,

3} , Martin Winter _{2,

3} , Patrick Theato _{1,

4}

Affiliation

Herein, we report on the synthesis of a systematic library of vinyl ether-based poly(ethylene oxide) (PEO) side-chain copolymers in order to reduce the crystallization of PEO. The influence of different grafted PEO side chain lengths, the grafting density, and the [Li⁺]:[EO] ratio after mixing with LiTFSI on the glass transition temperature (T_g), the crystallinity, and the resulting ionic conductivity was examined. Copolymers bearing longer PEO side chains and higher grafting densities show higher crystallization tendencies while their T_g is reduced at the same time. Furthermore, the addition of LiTFSI reduces crystallization but increases T_g. Because these effects are directly impacting the ionic conductivity, we demonstrate that the different parameters need to be carefully adjusted in order to balance their influence. In this way, a fundamental view that shows the potential of PEO side-chain copolymers for their applications as polymer electrolytes is provided.

中文翻译：

基于乙烯基醚的聚环氧乙烷侧链聚合物电解质的系统研究

在这里，我们报告了基于乙烯基醚的聚环氧乙烷（PEO）侧链共聚物的系统库的合成，以减少PEO的结晶。研究了不同的接枝PEO侧链长度，接枝密度以及与LiTFSI混合后的[Li ⁺ ]：[EO]比对玻璃化转变温度（T _g），结晶度和所得离子电导率的影响。带有更长PEO侧链和更高接枝密度的共聚物显示出更高的结晶趋势，同时它们的T _g降低。此外，添加LiTFSI会降低结晶度，但会增加T _g。由于这些效应直接影响离子电导率，因此我们证明需要仔细调整不同的参数，以平衡其影响。以此方式，提供了基本视图，其示出了PEO侧链共聚物在其作为聚合物电解质中的应用的潜力。

更新日期：2021-03-12

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