Polymer Template Synthesis of Flexible SiO2 Nanofibers to Upgrade Composite Electrolytes

• DOI: 10.1021/acsami.0c06922
• Publication Date: 2020-06-27T01:49:20Z
• Authors: Shujie Liu; Haoru Shan; Shuhui Xia; Jianhua Yan; Jianyong Yu; Bin Ding
• Keywords: Upgrade

Flexible oxide ceramic films offer prospects for revolutionizing diverse fields such as energy and electronics, but their fabrication methods are typically elaborate cannot be expanded. Here, we report a scalable strategy to fabricate flexible robust SiO2 nanofiber with controllable morphology using sol-gel electrospinning method followed by low-temperature calcination. When applied composite polymer electrolytes (CPEs) solid-state batteries filling polyethylene into porous films, nanofibers large surface areas (51 m2·g-1) demonstrate strong Lewis interfacial interactions isotropic ionic transfer channels that mitigate crystallinity Li+-concentration polarization, imparting high conductivity (1.3 × 10-4 S·cm-1 at 30 °C) structural stability the electrolytes. As result, all-solid-state LiFePO4||Li shows great rate capability long cycling discharge capacities of 159 132 mA·h·g-1 0.5C under 60 45 °C, respectively, demonstrating broad commercial scale production efficient solid