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Fabrication and application of TiO2-modified PMIA separators with strong mechanical properties in lithium-ion batteries

Fabrication and application of TiO2-modified PMIA separators with strong mechanical properties in... A TiO2/PMIA composite separator was prepared using poly(m-phenylene isophthalamide) (PMIA) as the base separator and polyacrylonitrile (PAN) as the binder to load TiO2 particles on its surface. The tensile strength of the TiO2/PMIA composite separator (37 MPa) was found to be greater than that of the pure PMIA separator (22 MPa) (increment of 68.2%), whereas the elongation at break of the TiO2/PMIA composite separator increased by 40%. TiO2 is a semiconductor material with a high dielectric constant which is also beneficial to improve electrochemical performance of PMIA seperator. The button cell assembled by the TiO2/PMIA composite separator had the best cycle performance (113.6 mAh/g), and its specific capacity was still 85.5 mAh/g at 2 C. Therefore, TiO2/PMIA composite separators with high mechanical properties can be used as promising lithium-ion battery separators in a wide range of applications. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Fabrication and application of TiO2-modified PMIA separators with strong mechanical properties in lithium-ion batteries

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References (41)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-021-04327-z
Publisher site
See Article on Publisher Site

Abstract

A TiO2/PMIA composite separator was prepared using poly(m-phenylene isophthalamide) (PMIA) as the base separator and polyacrylonitrile (PAN) as the binder to load TiO2 particles on its surface. The tensile strength of the TiO2/PMIA composite separator (37 MPa) was found to be greater than that of the pure PMIA separator (22 MPa) (increment of 68.2%), whereas the elongation at break of the TiO2/PMIA composite separator increased by 40%. TiO2 is a semiconductor material with a high dielectric constant which is also beneficial to improve electrochemical performance of PMIA seperator. The button cell assembled by the TiO2/PMIA composite separator had the best cycle performance (113.6 mAh/g), and its specific capacity was still 85.5 mAh/g at 2 C. Therefore, TiO2/PMIA composite separators with high mechanical properties can be used as promising lithium-ion battery separators in a wide range of applications.

Journal

IonicsSpringer Journals

Published: Jan 1, 2022

Keywords: PMIA; TiO2; Surface coating; Mechanical strength; Electrochemical performance

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