In this work, we introduce a new “mobile crosslink” concept for the fabrication of solid polymer electrolytes (SPEs) through the crosslinking of α-cyclodextrins (α-CDs) in a poly(ethylene glycol)-based (PEG-based) polyrotaxane. The PEG axis facilitates the conduction of lithium ions, while the crosslinked CDs that are not chemically bound to the PEG form mobile crosslinks that suppress the crystallization of PEG, maintaining its segmental mobility even after crosslinking. To weaken the strong hydrogen bonds between the abundant hydroxyl groups on the CDs, which restrict the segmental motion of PEG resulting in lower ionic conductivity, an appropriate amount of propyl isocyanate is added to effectively enhance the ionic conductivity and robustness of the SPE.

在这项工作中，我们引入了一种新的“移动交联”概念，该概念通过在基于聚乙二醇（基于PEG）的聚轮烷中的α-环糊精（α-CD）的交联来制造固体聚合物电解质（SPE） 。PEG轴有助于锂离子的传导，而未化学键合到PEG的交联CD形成可移动的交联，可抑制PEG的结晶，即使在交联后仍可保持其节段迁移率。为了减弱CD上丰富羟基之间的强氢键（这会限制PEG的分段运动，从而降低离子电导率），添加适量的异氰酸丙酯可有效增强SPE的离子电导率和耐用性。