Evaluation of electrospun SiO2/nylon 6,6 nanofiber membranes as a thermally-stable separator for lithium-ion batteries

Meltem Yanilmaz; Mahmut Dirican; Xiangwu Zhang

doi:10.1016/j.electacta.2014.04.109

Evaluation of electrospun SiO₂/nylon 6,6 nanofiber membranes as a thermally-stable separator for lithium-ion batteries

Meltem Yanilmaz
, Mahmut Dirican
, Xiangwu Zhang^*

^*Corresponding author for this work

North Carolina State University
Istanbul Technical University

Research output: Contribution to journal › Article › peer-review

138 Citations (Scopus)

Abstract

Electrospun SiO₂/nylon 6,6 nanofiber membranes were fabricated and their electrochemical performance was evaluated for use as separators in Li-ion batteries. The aim of this study was to design new high-performance separator membranes with enhanced mechanical properties and good thermal stability, as well as superior electrochemical performance compared to microporous polyolefin membranes. It was found that SiO₂/nylon 6,6 nanofiber membranes had superior thermal stability and mechanical strength with highly porous structure. Enhanced electrochemical properties were also obtained for these nanofiber membranes due to their high porosity values. Compared with commercial microporous polyolefin membranes, SiO₂/nylon 6,6 nanofiber membranes had larger liquid electrolyte uptake, higher electrochemical oxidation limit, and lower interfacial resistance with lithium. SiO ₂/nylon 6,6 nanofiber membranes with different SiO₂ contents (0, 3, 6, 9 and 12%) were assembled into lithium/lithium cobalt oxide and lithium/lithium iron phosphate cells. High cell capacities and good cycling performance were demonstrated at room temperature. In addition, cells using SiO₂/nylon 6,6 nanofiber membrane separators showed superior C-rate performance compared to those using commercial microporous polyolefin membrane.

Original language	English
Pages (from-to)	501-508
Number of pages	8
Journal	Electrochimica Acta
Volume	133
DOIs	https://doi.org/10.1016/j.electacta.2014.04.109
Publication status	Published - 1 Jul 2014
Externally published	Yes

Funding

This research was supported by the Advanced Transportation Energy Center and the ERC Program of the National Science Foundation under Award Number EEC-08212121.

Funders	Funder number
Advanced Transportation Energy Center
National Science Foundation	EEC-08212121
European Research Council

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Li-ion battery
Nylon 6;6
battery separator
electrospinning
nanofiber

Access to Document

10.1016/j.electacta.2014.04.109

Cite this

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title = "Evaluation of electrospun SiO2/nylon 6,6 nanofiber membranes as a thermally-stable separator for lithium-ion batteries",

abstract = "Electrospun SiO2/nylon 6,6 nanofiber membranes were fabricated and their electrochemical performance was evaluated for use as separators in Li-ion batteries. The aim of this study was to design new high-performance separator membranes with enhanced mechanical properties and good thermal stability, as well as superior electrochemical performance compared to microporous polyolefin membranes. It was found that SiO2/nylon 6,6 nanofiber membranes had superior thermal stability and mechanical strength with highly porous structure. Enhanced electrochemical properties were also obtained for these nanofiber membranes due to their high porosity values. Compared with commercial microporous polyolefin membranes, SiO2/nylon 6,6 nanofiber membranes had larger liquid electrolyte uptake, higher electrochemical oxidation limit, and lower interfacial resistance with lithium. SiO 2/nylon 6,6 nanofiber membranes with different SiO2 contents (0, 3, 6, 9 and 12\%) were assembled into lithium/lithium cobalt oxide and lithium/lithium iron phosphate cells. High cell capacities and good cycling performance were demonstrated at room temperature. In addition, cells using SiO2/nylon 6,6 nanofiber membrane separators showed superior C-rate performance compared to those using commercial microporous polyolefin membrane.",

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author = "Meltem Yanilmaz and Mahmut Dirican and Xiangwu Zhang",

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AU - Yanilmaz, Meltem

AU - Dirican, Mahmut

AU - Zhang, Xiangwu

PY - 2014/7/1

Y1 - 2014/7/1

N2 - Electrospun SiO2/nylon 6,6 nanofiber membranes were fabricated and their electrochemical performance was evaluated for use as separators in Li-ion batteries. The aim of this study was to design new high-performance separator membranes with enhanced mechanical properties and good thermal stability, as well as superior electrochemical performance compared to microporous polyolefin membranes. It was found that SiO2/nylon 6,6 nanofiber membranes had superior thermal stability and mechanical strength with highly porous structure. Enhanced electrochemical properties were also obtained for these nanofiber membranes due to their high porosity values. Compared with commercial microporous polyolefin membranes, SiO2/nylon 6,6 nanofiber membranes had larger liquid electrolyte uptake, higher electrochemical oxidation limit, and lower interfacial resistance with lithium. SiO 2/nylon 6,6 nanofiber membranes with different SiO2 contents (0, 3, 6, 9 and 12%) were assembled into lithium/lithium cobalt oxide and lithium/lithium iron phosphate cells. High cell capacities and good cycling performance were demonstrated at room temperature. In addition, cells using SiO2/nylon 6,6 nanofiber membrane separators showed superior C-rate performance compared to those using commercial microporous polyolefin membrane.

AB - Electrospun SiO2/nylon 6,6 nanofiber membranes were fabricated and their electrochemical performance was evaluated for use as separators in Li-ion batteries. The aim of this study was to design new high-performance separator membranes with enhanced mechanical properties and good thermal stability, as well as superior electrochemical performance compared to microporous polyolefin membranes. It was found that SiO2/nylon 6,6 nanofiber membranes had superior thermal stability and mechanical strength with highly porous structure. Enhanced electrochemical properties were also obtained for these nanofiber membranes due to their high porosity values. Compared with commercial microporous polyolefin membranes, SiO2/nylon 6,6 nanofiber membranes had larger liquid electrolyte uptake, higher electrochemical oxidation limit, and lower interfacial resistance with lithium. SiO 2/nylon 6,6 nanofiber membranes with different SiO2 contents (0, 3, 6, 9 and 12%) were assembled into lithium/lithium cobalt oxide and lithium/lithium iron phosphate cells. High cell capacities and good cycling performance were demonstrated at room temperature. In addition, cells using SiO2/nylon 6,6 nanofiber membrane separators showed superior C-rate performance compared to those using commercial microporous polyolefin membrane.

KW - Li-ion battery

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KW - electrospinning

KW - nanofiber

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