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Lithium-oxygen batteries with ester-functionalized ionic liquid-based electrolytes

机译：锂 - 氧气电池用酯官能化离子液体液体电解质

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摘要

Ester-functionalized ionic liquids with different cations (imidazolium, pyrrolidinium, piperidinium, morpholinium) and a bis(trifluoromethanesulfonyl) imide anion were synthesized and subsequently mixed with tetra(ethylene glycol) dimethylether (TEGDME) at different concentrations. The mixed solutions were ultimately investigated for their applicability as the electrolyte in non-aqueous lithium-oxygen batteries. Among the ionic liquids investigated, the pyrrolidinium-based ionic liquid, ethyl-N-methylpyrrolidinium-N-acetate bis(trifluoromethanesulfonyl) imide (MEEsPyr-TFSI), exhibited a lower viscosity, higher ionic conductivity and wider electrochemical stability window than any other ionic liquids. The addition of an appropriate amount of MEEsPyr-TFSI to the TEGDME-based organic electrolyte had a positive effect on the ionic conductivity, electrochemical stability and oxygen radical stability. A mixed ionic liquid-based solution with an optimum composition was successfully employed as a promising electrolyte for lithium-oxygen batteries with good cycling stability.
机译：合成了具有不同阳离子（咪唑鎓，吡咯烷酮，哌啶，大甲酸酯）和双（三氟甲磺酰基）酰亚胺阴离子的酯 - 官能化离子液体，随后以不同浓度与四（乙二醇）二甲醚（TEGDME）混合。最终研究了混合溶液，以它们作为非水锂 - 氧气电池中的电解质的适用性。在研究的离子液体中，基于吡咯烷铟类离子液体，乙基-N-甲基吡咯烷鎓-N-乙酸酯双（三氟甲磺酰基）酰亚胺（Meespyr-TFSI），表现出低于任何其他离子的粘度，更高的离子电导率和较宽的电化学稳定性窗口液体。向TEGDME基有机电解质中加入适量的Meespyr-TFSI对离子电导率，电化学稳定性和氧自由基稳定性具有阳性作用。具有最佳组合物的混合离子液体基溶液作为具有良好循环稳定性的锂 - 氧电池的有希望的电解质。

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  • 来源
    《RSC Advances》 |2015年第97期|共8页
  • 作者

    Kim Jae-Hong; Woo Hyun-Sik; Jin So-Jeong; Lee Je Seung; Kim Wonkeun; Ryu Kyounghan; Kim Dong-Won;

  • 作者单位

    Hanyang Univ Dept Chem Engn Seoul 133791 South Korea;

    Hanyang Univ Dept Chem Engn Seoul 133791 South Korea;

    Kyung Hee Univ Dept Chem Seoul 130701 South Korea;

    Kyung Hee Univ Dept Chem Seoul 130701 South Korea;

    Hyundai Motor Co R&

    D Div Gyeonggi Do 437815 South Korea;

    Hyundai Motor Co R&

    D Div Gyeonggi Do 437815 South Korea;

    Hanyang Univ Dept Chem Engn Seoul 133791 South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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