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

• Published in: Nano research Vol. 11; no. 12; pp. 6244 - 6251
• Main Authors: Zhang, Xuejing, Wang, Xingchao, Liu, Shuang, Tao, Zhanliang, Chen, Jun
• Format: Journal Article
• Language: English
• Published: Beijing Tsinghua University Press 01.12.2018; Springer Nature B.V
• Subjects: Aluminum oxide; Atomic/Molecular Structure and Spectra; Batteries; Biomedicine; Biotechnology; Chemistry and Materials Science; Composite materials; Condensed Matter Physics; Electrochemistry; Electrolytes; Ion currents; Materials Science; Mechanical properties; Nanotechnology; Polyethylene glycol; Polymers; Research Article; Sodium; Sodium perchlorate; Sodium-ion batteries; Solid electrolytes; Solid state; Work capacity; composite polymer electrolyte; Al; poly(ethylene glycol); solid-state; sodium ion batteries; O
• ISSN: 1998-0124; 1998-0000
• DOI: 10.1007/s12274-018-2144-3

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), α -Al 2 O 3 with acidic surface sites, and NaClO 4 exhibited high ionic conductivity (1.46 × 10 -4 S·cm -1 at 70 °C), wide electrochemical stability window (4.5 V vs. Na + /Na), and good mechanical strength. With the introduction of the prepared CPE and Na 3 V 2 (PO 4 ) 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 °C. Our work provides a novel solid electrolyte for the development of all-solid-state sodium ion batteries.