A novel PMA/PEG-based composite polymer electrolyte for all-solid-state sodium ion batteries

作者：Zhang, Xuejing; Wang, Xingchao; Liu, Shuang; Tao, Zhanliang^*; Chen, Jun

来源：Nano Research, 2018, 11(12): 6244-6251.

DOI：10.1007/s12274-018-2144-3

• solid-state
• composite polymer electrolyte
• poly(ethylene glycol)
• alpha-Al2O3
• sodium ion batteries

In recent years, development of all-solid-state batteries has become a promising approach to improve the safety of batteries. Herein, we report the preparation of a new composite polymer electrolyte (CPE) for use in all-solid-state sodium ion batteries. The CPE comprising of poly(methacrylate) (PMA), poly(ethylene glycol) (PEG), alpha-Al2O3 with acidic surface sites, and NaClO4 exhibited high ionic conductivity (1.46 x 10(-4) S.cm(-1) at 70 degrees C), wide electrochemical stability window (4.5 V vs. Na+/Na), and good mechanical strength. With the introduction of the prepared CPE and Na3V2(PO4)(3), the final all-solid-state sodium ion batteries showed good rate and cycle performance, with a high reversible capacity of 85 mAh.g(-1) when operated at 0.5 C (1 C = 118 mA.g(-1)) and 94.1% capacity retention rate after 350 cycles at 70 degrees C. Our work provides a novel solid electrolyte for the development of all-solid-state sodium ion batteries.

• 出版日期2018-12
• 单位南开大学; 新疆大学; 中国科学院长春应用化学研究所