分离器(采油)
芳纶
材料科学
纳米纤维素
热稳定性
复合材料
润湿
锂离子电池
化学工程
电解质
纤维素
纤维
化学
电极
电池(电)
物理化学
功率(物理)
工程类
物理
热力学
量子力学
作者
Runjie Yang,Zegang Wu,Tingting Lu,Guoqing Yu,Fengqin Liu,Tao Hu,Hongliang Zhao
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2023-02-01
卷期号:170 (2): 020519-020519
被引量:3
标识
DOI:10.1149/1945-7111/acb8e6
摘要
The poor thermal stability and wettability of commercial polyolefin separators are safety hazards that limit the electrochemical performance of lithium-ion batteries (LIBs). In this work, a novel aramid-nanocellulose fiber-based hybrid separator (Aramid-NCF separator) was fabricated by an industrial one-step paper-making process. The separator showed excellent heat stability, suitable pore structure, and outstanding electrolyte wettability, with a contact angle close to 0°. The Aramid-NCF separator showed superior ionic conductivity of 5.491 × 10 −4 S·cm −1 compared with an alumina-coated PE separator (PE-Al 2 O 3 separator) (3.260 × 10 −4 S·cm −1 ). LIBs with the Aramid-NCF separator also showed better C-rate performance, better cycling performance, and a higher capacity retention rate than batteries prepared with the PE-Al 2 O 3 separator. A pouch battery with the Aramid-NCF showed a higher capacity retention rate (89.17% after 200 cycles at 0.5 C) than a pouch battery with the PE-Al 2 O 3 separator (86.01% after 200 cycles at 0.5 C). Therefore, the Aramid-NCF separator is a promising candidate for next-generation LIBs.
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