In-situ preparation of gel polymer electrolytes in a fully-assembled lithium ion battery through deeply-penetrating high-energy electron beam irradiation

• DOI: 10.1016/j.cej.2022.139339
• Publication Date: 2022-09-23T16:49:07Z
• Authors: Seokyoung Park; Joon-Yong Sohn; In-Tae Hwang; Junhwa Shin; Jin-Mun Yun; KwangSup Eom; Kwanwoo Shin; Young-Moo Lee; Chan-Hee Jung
• Keywords: 01 natural sciences; 0104 chemical sciences

Several in-situ preparation methods of gel polymer electrolytes (GPEs) to develop long-lasting and safe lithium ion batteries (LIBs) recently have been reported. However, the reported still technical gaps for practical industrial uses in terms processing time, integrity with current production line, scalability. Here, we report an method prepare crosslinked poly(vinylene carbonate-co-cyanoethyl acrylate) (PVCEA) GPEs using 10 MeV electron beam (EB) irradiation a fully-assembled metallic housing LIB that can be processed short time without any initiator or thermal treatment. The successful formation PVCEA was achieved at absorbed doses above 16 kGy (irradiation 56 s), leading intimately integrated electrodes, while ensuring stable charge discharge performance. prepared GPE exhibited higher transference number (tLi+ = ca. 0.53) wider electrochemical operation window (up 5.0 V) than those liquid electrolyte (LE), providing good ionic conductivity (1.17 mS/cm 20 °C). Furthermore, GPE-based optimized dose showed comparable retention capacity 83 % 0.5C conventional LE-based after 300 cycles 25 °C, more importantly, better cycling durability elevated temperature 60 °C comparison LIB. This study suggests combination radiation-sensitive precursor formulation high-energy EB high penetration ability provide promising solution high-performing LIBs.