Volume 133, Issue 30
Article

Preparation and performance of aramid nanofiber membrane for separator of lithium ion battery

Jinglong Li

Jinglong Li

Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, 100084 People's Republic of China

Search for more papers by this author
Wenting Tian

Wenting Tian

Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, 100084 People's Republic of China

Search for more papers by this author
Hongchen Yan

Hongchen Yan

Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, 100084 People's Republic of China

Search for more papers by this author
Lianyuan He

Lianyuan He

Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, 100084 People's Republic of China

Search for more papers by this author
Xinlin Tuo

Corresponding Author

Xinlin Tuo

Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, 100084 People's Republic of China

Correspondence to: X. Tuo (E-mail: [email protected])Search for more papers by this author
First published: 05 April 2016
Citations: 69

ABSTRACT

Stable and uniform dispersions of para-aramid nanofibers have been prepared by adding methoxypolyethylene glycol (mPEG) in the polymerization process, followed by strong shear and dispersion. Aramid membranes are fabricated by vacuum-assisted filtration of the nanofiber dispersion and assembled into batteries as separator. The membrane properties and battery performances are characterized in detail and the effect of mPEG content on these properties is explored. It is demonstrated that aramid membranes possess good electrolyte wettability, excellent mechanical properties, and superior thermal stability, which improve the safety of lithium ion batteries. The mPEG is critical to the formation of aramid nanofibers and improves the porosity and ionic conductivity of the membranes. These fascinating characteristics and facile papermaking method endow aramid membrane potential application as separator in lithium ion batteries with superior safety. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43623.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.