Rational design of glass fiber-cellulose composite separator for sodium-ion batteries. (15th July 2023)

• Record Type: Journal Article
• Authors: Ma, Xiaohang; Zheng, Zihao; Zhang, Tianwen; Zhang, Xueqian; Ma, Yuan; Hou, Zhiguo; Guo, Yanqing; Wang, Xiaoyu; Cheng, Ziyang; Zi, Zhenfa
• Is Part Of: Scripta materialia. Number 232(2023)
• Publication Date: 2023-07-15
• Subjects: Separator -- Glass fiber -- Cellulose -- Sodium-ion batteries -- Electrochemical properties; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2023.115481
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Using glass fiber scraps as matrix and highly dispersed cellulose as enhancer, composite separators are prepared by a simple slurry sieving process. The effects of different composite proportions on the microstructure, mechanical properties, ionic conductivity and electrochemical properties are studied by SEM, tensile test, AC impedance and charge-discharge test, etc. As mass composite ratio is 1:1, the thickness of composite separator is 73.9 um, tensile strength is 29.5 Mpa and ion conductivity is 0.45 × 10 −3 S cm −1, respectively. Sodium-ion half-cell (Nax Ni[Fe(CN)6 ] as cathode) assembled by above composite separator exhibits excellent cycle stability (93.3% of capacity retention after 500 cycles at 1 C), rate capability (85.1% of capacity retention at 10 C) and maintains fine interfacial stability. Compared with glass fiber separator, some performance indicators of this new composite separator have been greatly improved, suggesting its potential application prospects in sodium-ion batteries. Graphical abstract: Image, graphical abstract