Kim Kangsanin, Yi Eun-Jeong, Hwang Haejin
Department of Materials Science and Engineering, Inha University, Incheon 22212, Korea.
J Nanosci Nanotechnol. 2021 Jul 1;21(7):3742-3746. doi: 10.1166/jnn.2021.19223.
The purpose of this study was to improve the ionic conductivity and physical properties of a polymer electrolyte by complexing it with ceramic particles. First, a polymer/ceramic composite solid electrolyte was prepared by synthesizing a super porous silica aerogel powder and adding it to a slurry containing a polyethylene oxide (PEO)-based polymer electrolyte; then, the electrochemical properties of electrolyte of different compositions were confirmed. PEO and polymethyl methacrylate (PMMA) were copolymerized, the optimum ratio of lithium salt, plasticizer, and silica aerogel was determined, and ion conductivity of the composite electrolyte was improved. When the EO:Li ratio was 10:1, the glass transition temperature was the lowest, and the room-temperature ion conductivity was improved to 3.0 × 10 S/cm. As a result of XRD and thermal analysis, it was confirmed that the stability and durability of the electrolyte interface can also be improved by complexation of the polymer electrolyte with ceramic particles.
本研究的目的是通过将聚合物电解质与陶瓷颗粒复合来提高其离子电导率和物理性能。首先，通过合成超多孔二氧化硅气凝胶粉末并将其添加到含有聚环氧乙烷（PEO）基聚合物电解质的浆料中来制备聚合物/陶瓷复合固体电解质；然后，确认了不同组成电解质的电化学性能。将PEO和聚甲基丙烯酸甲酯（PMMA）共聚，确定了锂盐、增塑剂和二氧化硅气凝胶的最佳比例，并提高了复合电解质的离子电导率。当EO:Li比为10:1时，玻璃化转变温度最低，室温离子电导率提高到3.0×10 S/cm。XRD和热分析结果表明，聚合物电解质与陶瓷颗粒复合还可以提高电解质界面的稳定性和耐久性。
