High-strength, thermally stable nylon 6,6 composite nanofiber separators for lithium-ion batteries

Meltem Yanilmaz, Jiadeng Zhu, Yao Lu, Yeqian Ge, Xiangwu Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

Electrospun nylon 6,6 composite nanofiber membranes containing TiO2 or SiO2 nanoparticles were fabricated, and their physical and electrochemical properties were assessed for use as high-strength, thermally stable separators for lithium-ion batteries. Experimental results demonstrated that TiO2/nylon 6,6 and SiO2/nylon 6,6 nanofiber membranes not only displayed good mechanical strength and excellent thermal stability, but also showed improved electrochemical properties compared to commercial polypropylene membrane separator. Larger liquid electrolyte uptake, higher ionic conductivity, higher electrochemical oxidation limit, and lower interfacial resistance with lithium were obtained for TiO2/nylon 6,6 and SiO2/nylon 6,6 nanofiber membranes. Among all membranes studied, SiO2/nylon 6,6 nanofiber membranes showed the highest ionic conductivity and lowest interfacial resistance with lithium owing to their highest porosity and well-dispersed nanoparticles. In addition, Li/LiCoO2 and Li/LiFePO4 cells containing these composite nanofiber membranes demonstrated high cell capacities, good cycling performance, and superior C-rate performance at room temperature.

Original languageEnglish
Pages (from-to)5232-5241
Number of pages10
JournalJournal of Materials Science
Volume52
Issue number9
DOIs
Publication statusPublished - 1 May 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017, Springer Science+Business Media New York.

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