分离器(采油)
电解质
纤维素
化学工程
材料科学
热稳定性
钠
电化学
润湿
离子
化学
复合材料
有机化学
电极
冶金
热力学
物理
工程类
物理化学
作者
Hongyang Zhou,Jin Gu,Weiwei Zhang,Chuanshuang Hu,Xiuyi Lin
出处
期刊:Molecules
[Multidisciplinary Digital Publishing Institute]
日期:2021-09-12
卷期号:26 (18): 5539-5539
被引量:11
标识
DOI:10.3390/molecules26185539
摘要
Cellulose nanofibrils (CNF) with high thermal stability and excellent electrolyte wettability attracted tremendous attention as a promising separator for the emerging sodium-ion batteries. The pore structure of the separator plays a vital role in electrochemical performance. CNF separators are assembled using the bottom-up approach in this study, and the pore structure is carefully controlled through film-forming techniques. The acid-treated separators prepared from the solvent exchange and freeze-drying demonstrated an optimal pore structure with a high electrolyte uptake rate (978.8%) and Na+ transference number (0.88). Consequently, the obtained separator showed a reversible specific capacity of 320 mAh/g and enhanced cycling performance at high rates compared to the commercial glass fiber separator (290 mAh/g). The results highlight that CNF separators with an optimized pore structure are advisable for sodium-ion batteries.
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