Hou Jian, Park In Kee, Cha Woo Ju, Lee Chang Hyun
Department of Energy Engineering, Dankook University, Cheonan 31116, Korea.
Membranes (Basel). 2021 Mar 19;11(3):219. doi: 10.3390/membranes11030219.
In this research, a series of innovative and stable cross-linked gel polymer reinforced membranes (GPRMs), were successfully prepared and investigated for application in lithium-ion batteries. Herein, a gel directly within the commercial polyethylene (PE) separator is supported via electron-beam simultaneous irradiation cross-linking of commercial liquid electrolyte and poly(ethylene glycol) methacrylate (PEGMA) oligomers. The physical and electrochemical properties of the GPRMs were characterized by SEM, TEM, mechanical durability, heating shrinkage, and ion conductivity, etc. The GPRMs demonstrated excellent mechanical durability and high ion conductivity compared with traditional PE membranes. Moreover, coin-typed cells were assembled and cycle performance was also studied compared with same-typed cells with commercial PE membrane and liquid electrolyte. As a result, the coin-typed cells using GPRMs also showed a relatively good efficiency on the 50th cycles at a high 1.0 C-rate. These GPRMs with excellent properties present a very promising material for utilization in high-performance lithium-ion batteries with improved safety and reliability.
在本研究中，成功制备了一系列创新且稳定的交联凝胶聚合物增强膜（GPRMs），并对其在锂离子电池中的应用进行了研究。在此，通过商业液体电解质和聚（甲基丙烯酸乙二醇酯）（PEGMA）低聚物的电子束同步辐照交联，在商业聚乙烯（PE）隔膜内直接支撑形成一种凝胶。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、机械耐久性、热收缩率和离子电导率等对GPRMs的物理和电化学性能进行了表征。与传统PE膜相比，GPRMs表现出优异的机械耐久性和高离子电导率。此外，组装了硬币型电池，并与使用商业PE隔膜和液体电解质的同类型电池相比，研究了其循环性能。结果，使用GPRMs的硬币型电池在1.0 C的高倍率下第50次循环时也表现出相对良好的效率。这些具有优异性能的GPRMs是用于具有更高安全性和可靠性的高性能锂离子电池的非常有前景的材料。
