【摘要】 近年来便携式电子设备爆炸事件频发,主要是由于传统锂离子电池隔膜/电解液体系容易发生电解液泄漏以及隔膜严重热收缩导致的正负极接触短路。化学交联型凝胶聚合物电解质的出现在很大程度上改善了电池漏液的问题。同时,交联网络赋予聚合物基体优异的尺寸稳定性,大大提高了其安全性能。因此,化学交联型凝胶聚合物电解质得到了科研工作者们的广泛关注和研究。本文根据引发及制备方法的不同,综述了利用热引发、光引发、辐射引发、环氧开环加成以及溶胶-凝胶法制备的交联凝胶型聚合物电解质,并对其力学性能和电化学性能进行了介绍。更多还原

【Abstract】 In recent years,there are many explosion accidents of portable electronic devices,which are mainly due to the electrolyte leakage of the separator/electrolyte system of traditional lithium-ion batteries and severe heat shrinkage of the separator resulting in short-circuiting between positive and negative electrodes.The appearance of polymer electrolytes has greatly improved the safety of traditional lithiumion batteries.Polymer electrolytes mainly include all-solid polymer electrolytes(SPEs)and gel polymer electrolytes(GPEs).For all-solid polymer electrolytes,it still needs a long way for their industrial application because they have low ionic conductivity(10-6—10-8 S/cm)at ambient temperature,which does not meet the basic requirements for practical use.GPEs are a hybrid system formed by trapping liquid electrolyte in a polymer matrix,combining the advantages of high safety of solid electrolyte and high ion conductivity of liquid electrolyte.Among them,cross-linked GPEs have received extensive attention.The cross-linking networks prevent the leakage of electrolyte and improve the mechanical properties and dimensional stability of polymer matrix,so the battery safety performance can be greatly improved.Crosslinked GPEs prepared by thermal initiation,photoinitiation,radiation initiation,epoxy ring-opening addition,and sol-gel methods are reviewed according to their initiating and preparing methods,meanwhile their mechanical and electrochemical properties are also introduced.更多还原