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A Flexible and Self-Healable Gelled Polymer Electrolyte Based on a Dynamically Cross-Linked PVA Ionogel for High-Performance Supercapacitors
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-12-17 , DOI: 10.1021/acs.iecr.0c04741 Jintian Wu 1 , Gaojing Xia 1 , Shangbo Li 1 , Lupei Wang 1 , Jianjun Ma 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-12-17 , DOI: 10.1021/acs.iecr.0c04741 Jintian Wu 1 , Gaojing Xia 1 , Shangbo Li 1 , Lupei Wang 1 , Jianjun Ma 1
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Ionogels combine the virtues of polymers and ionic liquids (ILs) and have greater potential for supercapacitors (SCs) than hydrogels and organic gels. Undoubtedly, the self-healing ability of ionogels dramatically improves the reliability of related SCs. Herein, we reported a dynamic diol-borate ester-cross-linked polyvinyl alcohol (PVA) ionogel electrolyte for smart double-layer capacitors. The results indicated that 1-ethyl-3-methylimidazolium chloride (EmimCl) could form a strong interaction with the hydroxy groups on PVA, thereby depressing the crystallization efficiently. The resultant ionogel exhibited an amorphous nature with excellent ionic conductivity up to 2.43 × 10–3 S/cm, high flexibility, and 95% healing efficiency when the IL content was 90 vol %. It could be inferred from the fact that EmimCl acted not only as an ion provider to improve the ionic conductivity but also as a plasticizer to enhance the chain mobility and self-healing efficiency. Based on the unique properties of PVA-boric acid/EmimCl ionogels, a flexible and self-healable SC was assembled. The as-prepared SC delivered a specific capacitance of 90 F/g at 0.1 A/g and retained 98% capacitance after 3000 charge–discharge cycles at a current density of 2 A/g. More interestingly, it could tolerate physical bending and healing without significant performance deterioration. The present study provides a novel strategy to prepare self-healable ionogel electrolytes that can be applied to smart energy storage devices.
中文翻译：
基于动态交联的PVA离子凝胶的柔性，自修复凝胶聚合物电解质，用于高性能超级电容器
离子凝胶结合了聚合物和离子液体（IL）的优点，并且比水凝胶和有机凝胶具有更大的超级电容器（SC）潜力。毫无疑问，离子凝胶的自我修复能力极大地提高了相关SC的可靠性。在这里，我们报道了一种用于智能双层电容器的动态二醇硼酸酯交联聚乙烯醇（PVA）离子凝胶电解质。结果表明1-乙基-3-甲基咪唑氯化物（EmimCl）可以与PVA上的羟基形成强相互作用，从而有效地抑制了结晶。所得的离子凝胶表现出无定形性质，具有优异的离子电导率，最高可达2.43×10 –3当IL含量为90vol％时，S / cm，高柔韧性和95％的治愈效率。从EmimCl不仅可以充当离子提供者来改善离子电导率，而且还可以充当增塑剂来增强链迁移率和自修复效率这一事实可以推断。基于PVA-硼酸/ EmimCl离子凝胶的独特性能，组装了一种柔性且可自愈的SC。所制备的SC在0.1 A / g时可提供90 F / g的比电容，并在2 A / g的电流密度下经过3000次充放电循环后仍保持98％的电容。更有趣的是，它可以忍受物理弯曲和愈合而不会显着降低性能。本研究提供了一种制备可用于智能能量存储设备的自修复离子凝胶电解质的新策略。
更新日期：2020-12-30
中文翻译：
基于动态交联的PVA离子凝胶的柔性，自修复凝胶聚合物电解质，用于高性能超级电容器
离子凝胶结合了聚合物和离子液体（IL）的优点，并且比水凝胶和有机凝胶具有更大的超级电容器（SC）潜力。毫无疑问，离子凝胶的自我修复能力极大地提高了相关SC的可靠性。在这里，我们报道了一种用于智能双层电容器的动态二醇硼酸酯交联聚乙烯醇（PVA）离子凝胶电解质。结果表明1-乙基-3-甲基咪唑氯化物（EmimCl）可以与PVA上的羟基形成强相互作用，从而有效地抑制了结晶。所得的离子凝胶表现出无定形性质，具有优异的离子电导率，最高可达2.43×10 –3当IL含量为90vol％时，S / cm，高柔韧性和95％的治愈效率。从EmimCl不仅可以充当离子提供者来改善离子电导率，而且还可以充当增塑剂来增强链迁移率和自修复效率这一事实可以推断。基于PVA-硼酸/ EmimCl离子凝胶的独特性能，组装了一种柔性且可自愈的SC。所制备的SC在0.1 A / g时可提供90 F / g的比电容，并在2 A / g的电流密度下经过3000次充放电循环后仍保持98％的电容。更有趣的是，它可以忍受物理弯曲和愈合而不会显着降低性能。本研究提供了一种制备可用于智能能量存储设备的自修复离子凝胶电解质的新策略。
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