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A Supramolecular Electrolyte for Lithium‐Metal Batteries
Batteries & Supercaps ( IF 5.1 ) Pub Date : 2019-10-02 , DOI: 10.1002/batt.201900112 Jin Xie 1 , Bo‐Quan Li 1 , Yun‐Wei Song 1 , Hong‐Jie Peng 1 , Qiang Zhang 1
Batteries & Supercaps ( IF 5.1 ) Pub Date : 2019-10-02 , DOI: 10.1002/batt.201900112 Jin Xie 1 , Bo‐Quan Li 1 , Yun‐Wei Song 1 , Hong‐Jie Peng 1 , Qiang Zhang 1
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Lithium‐metal batteries are regarded as one of the most promising energy storage systems, but they suffer from safety and stability problems owing to unstable liquid electrolytes. To solidify the electrolyte is an effective strategy to promote the strength and stability of the electrolyte‐electrode interfaces. However, solidified electrolytes are commonly inferior in bulk and interfacial ion conductivity, rendering unsatisfactory battery performances. Herein, a novel supramolecular electrolyte with high bulk and interfacial ion conductivity is proposed for Li‐metal batteries. Supramolecular interactions with oriented assembly and moderate bonding energies endow the lithium‐ion transport with low resistance. Additional advantages of flexibility and plasticity improve the interfacial properties. Consequently, the prototype supramolecular electrolyte affords a promising bulk lithium‐ion conductivity of 2.9×10−4 S cm−1, comparable interfacial resistance of 60 Ω, and a low polarity of 152 mV at 0.2 C in LiFePO4 half‐cells at room temperature (25 °C). The supramolecular electrolyte provides not only a new family of electrolyte, but also an effective strategy to promote ion transportation and reduce the interfacial resistance of lithium‐based energy storage systems.
中文翻译：
锂金属电池的超分子电解质
锂金属电池被认为是最有前途的储能系统之一，但是由于不稳定的液体电解质，它们遭受了安全性和稳定性问题。固化电解质是提高电解质-电极界面强度和稳定性的有效策略。然而，固化的电解质通常在体积和界面离子传导性方面较差，从而使电池性能不令人满意。在此，提出了一种用于锂金属电池的具有高体积和界面离子电导率的新型超分子电解质。具有定向组装和适度键合能的超分子相互作用使锂离子传输具有低电阻。柔韧性和可塑性的其他优点改善了界面性能。所以，在室温（25°C）下的LiFePO 4半电池中，在0.2 C时，−4 S cm -1，可比较的界面电阻，低极性152 mV 。超分子电解质不仅提供了新的电解质系列，而且还提供了一种有效的策略来促进离子传输并降低锂基储能系统的界面电阻。
更新日期：2019-10-10
中文翻译：
锂金属电池的超分子电解质
锂金属电池被认为是最有前途的储能系统之一，但是由于不稳定的液体电解质，它们遭受了安全性和稳定性问题。固化电解质是提高电解质-电极界面强度和稳定性的有效策略。然而，固化的电解质通常在体积和界面离子传导性方面较差，从而使电池性能不令人满意。在此，提出了一种用于锂金属电池的具有高体积和界面离子电导率的新型超分子电解质。具有定向组装和适度键合能的超分子相互作用使锂离子传输具有低电阻。柔韧性和可塑性的其他优点改善了界面性能。所以，在室温（25°C）下的LiFePO 4半电池中，在0.2 C时，−4 S cm -1，可比较的界面电阻，低极性152 mV 。超分子电解质不仅提供了新的电解质系列，而且还提供了一种有效的策略来促进离子传输并降低锂基储能系统的界面电阻。
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