Robust and high thermal-stable composite polymer electrolyte reinforced by PI nanofiber network. (14th September 2021)

• Record Type: Journal Article
• Authors: Wang, Qi; Yuan, Boheng; Lu, Yafei; Shen, Fei; Zhao, Bin; Han, Xiaogang
• Is Part Of: Nanotechnology. Volume 32:Number 49(2021)
• Publication Date: 2021-09-14
• Subjects: composite polymer electrolytes -- electrospinning -- PI nanofiber membrane -- solid-state batteries; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ac2093
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: To address the flammable and chemical unstable problems of liquid electrolyte, the solid electrolyte is a promising candidate to replace liquid electrolyte for solid-state batteries. Herein, a composite polymer electrolyte (CPE) of 3D polyimide (PI)-nanofiber membrane-incorporated polyethylene oxide (PEO)/lithium bis (triflu-romethanesulphonyl) imid (LiTFSI) is reported. Three advantages of the PI nanofiber network in the CPE include providing a continuous, rapid transport channel of lithium ions to improve the Li-ion conductivity, improving the mechanical properties and stability, and effectively inhibiting the dendrite growth of Li metal. The PI/PEO/LiTFSI CPE delivers an ionic conductivity of 4.2 × 10 −4 S cm −1 at 60 °C, a wider electrochemical window to 5.4 V, and an excellent thermal stability, which result in the excellent electrochemical performance of LiFePO4 full cells assembled with PI/PEO/LiTFSI CPE.