Improved performance of PVdF-HFP/PI nanofiber membrane for lithium ion battery separator prepared by a bicomponent cross-electrospinning method
Improved performance of PVdF-HFP/PI nanofiber membrane for lithium ion battery separator prepared by a bicomponent cross-electrospinning method
复制标题
双组分交叉静电纺丝法制备锂离子电池隔膜PVdF-HFP/PI纳米纤维膜的性能改进
DOI：
10.1016/j.matlet.2014.06.163
复制
发表时间：
2014-10-15
影响因子：
3
通讯作者：
Liu, Xiangren
中科院分区：
文献类型：
--
作者：
Chen, Weiya;Liu, Yanbo;Liu, Xiangren
采用四针静电纺丝装置制备了聚偏氟乙烯-共六氟丙烯/聚酰亚胺（PVdF-HFP/PI）复合纳米纤维锂离子电池隔膜膜。两根针分别注入PVdF-HFP溶液，另一根针注入PI溶液，两种聚合物溶液在直线上交替排列，形成复合膜，可称为交叉静电纺丝，然后通过熔融温度较低的PVdF-HFP组分进行热压延工艺，以提高复合膜的力学性能。PVdF-HFP/PI复合膜在物理性能方面表现出良好的效果。此外，与Celgard 2400 PP分离器相比，复合隔板组装的电池具有更好的电化学稳定性、更低的界面电阻和更高的离子电导率。锂离子电池隔膜性能的提高表明，双组分交叉静电纺丝法在未来锂离子电池隔膜设计中具有潜在的应用前景。(C) 2014 Elsevier B.V.版权所有
Poly(vinylidene fluoride-co-hexafluoropropylene)/polyimide (PVdF-HFP/PI) composite nanofiber membrane used for lithium ion battery separator was prepared by an electrospinning apparatus equipped with four needles. Two needles were fed with PVdF-HFP solution and the rest with PI solution and the two types of polymer solutions were arrayed alternately, in a straight line to form a composite membrane, which could be referred to as cross-electrospinning, followed by thermal calendering process to improve the mechanical property of the composite membrane via fusing the PVdF-HFP component which has lower melting temperature. PVdF-HFP/PI composite membrane showed positive results in terms of physical properties. Additionally, the cells assembled with the composite separators exhibited better electrochemical stability, lower interfacial resistance and higher ionic conductivity, compared with Celgard 2400 PP separator. Conspicuously, the improved performance of lithium ion battery separator indicated that bicomponent cross-electrospinning method could be potentially applied for designing future lithium ion battery separator. (C) 2014 Elsevier B.V. All rights reserved.