S Grewal Manjit, Ishibashi Kosuke, Hara Mitsuo, Ishizaki Yuya, Nagano Shusaku, Yabu Hiroshi
Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-8577, Japan.
Graduate School of Engineering, Nagoya University, Furocho, Chikusa-Ku, Nagoya 464-8603, Japan.
Langmuir. 2023 Jul 25;39(29):10209-10215. doi: 10.1021/acs.langmuir.3c01146. Epub 2023 Jul 12.
To obtain safe, high-performance Li-ion batteries, the development of electrolytes with high impact resistance and high ionic conductivity is important. Ionic conductivity at room temperature has been improved by using poly(ethylene glycol) (PEG) diacrylate (PEGDA) to form three-dimensional (3D) networks and solvated ionic liquids. However, the effects of the molecular weight of PEGDA on ionic conductivities and the relationship between ionic conductivities and network structures of cross-linked polymer electrolytes have not been discussed in detail. In this study, the dependence of the ionic conductivity of photo-cross-linked PEG solid electrolytes on the molecular weight of the PEGDA was evaluated. X-ray scattering (XRS) gave detailed information about the dimensions of 3D networks formed by the photo-cross-linking of PEGDA, and the effects of the network structures on the ionic conductivities were discussed.
为了获得安全、高性能的锂离子电池，开发具有高抗冲击性和高离子电导率的电解质非常重要。通过使用聚（乙二醇）（PEG）二丙烯酸酯（PEGDA）形成三维（3D）网络和溶剂化离子液体，室温下的离子电导率得到了提高。然而，PEGDA分子量对离子电导率的影响以及交联聚合物电解质的离子电导率与网络结构之间的关系尚未得到详细讨论。在本研究中，评估了光交联PEG固体电解质的离子电导率对PEGDA分子量的依赖性。X射线散射（XRS）提供了关于PEGDA光交联形成的3D网络尺寸的详细信息，并讨论了网络结构对离子电导率的影响。
