Issue 8, 2018

Flexible inorganic membranes used as a high thermal safety separator for the lithium-ion battery

Abstract

A flexible SiO2 porous fiber membrane (SF) is prepared by electrospinning followed by calcination in this work. Compared with an organic substrate separator, the SF used as a separator will be an absolute guarantee of the battery thermal safety. The porosity of the SF is 88.6%, which is more than twice that of a regular PP separator. Hydrophilic SF shows better electrolyte wetting ability and its high porosity enables the SF to absorb 633% liquid electrolyte on average, while the lithium-ion conductivity reaches 1.53 mS cm−1. The linear sweep voltammogram testing of PP and SF suggested that SF, with great electrochemical stability, can meet the requirements of lithium-ion batteries. The cyclic and rate performances of batteries prepared with SF are improved significantly. Such advantages of the SF, together with its potential in mass production, make the SF a promising membrane for practical applications in secondary lithium-ion batteries.

Graphical abstract: Flexible inorganic membranes used as a high thermal safety separator for the lithium-ion battery

Supplementary files

Article information

Article type
Paper
Submitted
05 dec 2017
Accepted
15 jan 2018
First published
23 jan 2018
This article is Open Access
Creative Commons BY license

RSC Adv., 2018,8, 4072-4077

Flexible inorganic membranes used as a high thermal safety separator for the lithium-ion battery

C. Shi, J. Zhu, X. Shen, F. Chen, F. Ning, H. Zhang, Y. Long, X. Ning and J. Zhao, RSC Adv., 2018, 8, 4072 DOI: 10.1039/C7RA13058A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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