Yang Shuting, Ma Wenhao, Wang Aili, Gu Jifeng, Yin Yanhong
School of Chemistry and Chemical Engineering, Henan Normal University Xinxiang Henan 453007 P. R. China
National & Local Joint Engineering Laboratory for Motive Power and Key Materials Xinxiang Henan 453007 China.
RSC Adv. 2018 Jun 27;8(41):23390-23396. doi: 10.1039/c8ra02035c. eCollection 2018 Jun 21.
A novel and facile core-shell structured polyacrylonitrile@poly (vinylidene fluoride-hexafluoro propylene) (PAN@PVDF-HFP) microfiber complex membrane was designed and fabricated co-axial electrospinning, which was used as a separator in lithium-ion batteries. Poly(vinylidene fluoride--hexafluoro propene) (PVDF-HFP) and polyacrylonitrile (PAN) were used as the shell (outer) layer and core (inner), respectively. Structure, surface morphology, porosity, and thermal properties of the core-shell structured microfiber membranes were investigated. Compared with the traditional commercial porous polyethylene (PE) separator, the PAN@PVDF-HFP microfiber complex membranes exhibited higher porosity, superior thermal stability, better electrolyte wettability and higher ionic conductivity. As a consequence, batteries assembled with the PAN@PVDF-HFP microfiber complex membrane display better cycling stability and superior rate performance compared to those with the PE separator.
通过同轴静电纺丝设计并制备了一种新型且简便的核壳结构聚丙烯腈@聚（偏二氟乙烯-六氟丙烯）（PAN@PVDF-HFP）复合微纤维膜，该膜用作锂离子电池的隔膜。聚（偏二氟乙烯-六氟丙烯）（PVDF-HFP）和聚丙烯腈（PAN）分别用作壳（外层）和核（内层）。研究了核壳结构微纤维膜的结构、表面形态、孔隙率和热性能。与传统的商用多孔聚乙烯（PE）隔膜相比，PAN@PVDF-HFP复合微纤维膜具有更高的孔隙率、更好的热稳定性、更佳的电解液润湿性和更高的离子电导率。因此，与使用PE隔膜组装的电池相比，使用PAN@PVDF-HFP复合微纤维膜组装的电池表现出更好的循环稳定性和优异的倍率性能。
