Surface Technology Division, Korea Institute of Materials Science , Changwon 51508, Republic of Korea.
ACS Appl Mater Interfaces. 2017 Mar 15;9(10):8813-8818. doi: 10.1021/acsami.6b12283. Epub 2017 Mar 2.
A new type of physically cross-linked solid polymer electrolyte was demonstrated by using a poly(vinylidene fluoride) (PVDF) homopolymer in a room-temperature ionic liquid. The physical origins of gelation, specific capacitance, ionic conductivity, mechanical property, and capacitive charge modulation in organic thin-film electrochemical transistors were investigated systematically. Gelation occurs through bridging phase-separated homopolymer crystals by polymer chains in the composite electrolyte, thereby forming a rubbery network. The resulting homopolymer ion gels are able to accommodate both outstanding electrical (ionically conductive and capacitive) and mechanical (flexible and free-standing) characteristics of the component ionic liquid and the structuring polymer, respectively. These ion gels were successfully applied to organic thin-film transistors as high-capacitance gate dielectrics. Therefore, these results provide an effective route to generate a highly conductive rubbery polymer electrolyte that can be used in widespread electronic and electrochemical devices.
通过使用聚偏氟乙烯（PVDF）均聚物在室温离子液体中，展示了一种新型的物理交联固体聚合物电解质。系统研究了有机薄膜电化学晶体管中凝胶化、比电容、离子电导率、机械性能和电容电荷调制的物理起源。凝胶化通过复合电解质中聚合物链桥接相分离的均聚物晶体来发生，从而形成橡胶状网络。所得的均聚物离子凝胶分别能够容纳组成离子液体和结构聚合物的出色的电（离子导电和电容）和机械（柔韧和自立）特性。这些离子凝胶成功地用作有机薄膜晶体管的高电容栅极电介质。因此，这些结果提供了一种生成高导电性橡胶状聚合物电解质的有效途径，该电解质可用于广泛的电子和电化学器件。
