Electrospun Sandwich-like Structure of PVDF-HFP/Cellulose/PVDF-HFP Membrane for Lithium-Ion Batteries

被引:8
作者
Zi, Xingfu [1 ]
Wu, Hongming [2 ]
Song, Jiling [2 ]
He, Weidi [2 ]
Xia, Lu [3 ]
Guo, Jianbing [1 ,2 ]
Luo, Sihai [3 ]
Yan, Wei [2 ]
机构
[1] Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China
[2] Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China
[3] Norwegian Univ Sci & Technol NTNU, Dept Chem, N-7491 Trondheim, Norway
来源
MOLECULES | 2023年 / 28卷 / 13期
关键词
lithium-ion batteries; separator; cellulose; electrospinning; interfacial compatibility; cycle stability; GEL POLYMER ELECTROLYTE; HIGH-SAFETY; CELLULOSE; SEPARATOR; PERFORMANCE;
D O I
10.3390/molecules28134998
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Cellulose membranes have eco-friendly, renewable, and cost-effective features, but they lack satisfactory cycle stability as a sustainable separator for batteries. In this study, a two-step method was employed to prepare a sandwich-like composite membrane of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)/cellulose/ PVDF-HFP (PCP). The method involved first dissolving and regenerating a cellulose membrane and then electrospinning PVDF-HFP on its surface. The resulting PCP composite membrane exhibits excellent properties such as high porosity (60.71%), good tensile strength (4.8 MPa), and thermal stability up to 160 & DEG;C. It also has exceptional electrolyte uptake properties (710.81 wt.%), low interfacial resistance (241.39 & omega;), and high ionic conductivity (0.73 mS/cm) compared to commercial polypropylene (PP) separators (1121.4 & omega; and 0.26 mS/cm). Additionally, the rate capability (163.2 mAh/g) and cycling performance (98.11% after 100 cycles at 0.5 C) of the PCP composite membrane are superior to those of PP separators. These results demonstrate that the PCP composite membrane has potential as a promising separator for high-powered, secure lithium-ion batteries.
引用
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页数:15
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