材料科学
分离器(采油)
膜
纳米纤维
阳极
化学工程
静电纺丝
锂离子电池
多孔性
氟化物
阴极
电池(电)
复合材料
聚合物
无机化学
电极
化学
生物化学
物理
功率(物理)
物理化学
量子力学
工程类
热力学
作者
Hendri Widiyandari,Berlian Muhammad Ilham,Oki Ade Putra,Risa Suryana
出处
期刊:Solid State Phenomena
日期:2022-07-15
卷期号:334: 175-181
摘要
A separator is one of the main components of lithium-ion batteries. It separates the cathode and anode while allowing the exchange of ions, and reduces the risk of a short circuit that can cause battery failure. In this study, membranes consisting of electrospun, SiO 2 -containing, poly(vinylidene fluoride) nanofibers were synthesized for use as separators in lithium-ion batteries. Moreover, this study investigated the effect of the volume of colloidal SiO 2 (1, 2, and 3 mL) in the precursor (a PVDF/SiO 2 solution containing 10 mL of PVDF solution) on the properties of an associated nanofiber membrane and its performance in a coin cell battery. It was found that the porosity, mechanical strength, and thermal resistance of PVDF/SiO 2 nanofiber membranes increase with the increasing volume of colloidal SiO 2 in the precursor. The PVDF/SiO 2 precursor containing 3 mL SiO 2 produces an optimal membrane separator with a porosity of 67%, thermal shrinkage ratio of 1.3%, and elongation at break of 24%. These results show that PVDF/SiO 2 separators have higher porosity rates than pp and PE membrane separators. Furthermore, the corresponding coin cell battery achieves the highest charge and discharge capacities, i.e., 2.36 and 1.36 mAh/g, respectively.
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