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 12 2017
Accepted
15 1 2018
First published
23 1 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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