Porous poly(vinylidene fluoride-co-hexafluoropropylene) polymer membrane with sandwich-like architecture for highly safe lithium ion batteries

Zhang, J; Chen, S; Xie, X; Kretschmer, K; Huang, X; Sun, B; Wang, G

Porous poly(vinylidene fluoride-co-hexafluoropropylene) polymer membrane with sandwich-like architecture for highly safe lithium ion batteries

Zhang, J

Chen, S Xie, X

Kretschmer, K

Huang, X

Sun, B

Wang, G

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Publication Type:: Journal Article
Citation:: Journal of Membrane Science, 2014, 472 pp. 133 - 140
Issue Date:: 2014-12-05

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Field	Value	Language
dc.contributor.author	Zhang, J https://orcid.org/0000-0001-5476-0134	en_US
dc.contributor.author	Chen, S	en_US
dc.contributor.author	Xie, X https://orcid.org/0000-0002-8670-8397	en_US
dc.contributor.author	Kretschmer, K https://orcid.org/0000-0002-9089-6300	en_US
dc.contributor.author	Huang, X https://orcid.org/0000-0002-1929-653X	en_US
dc.contributor.author	Sun, B https://orcid.org/0000-0002-4365-486X	en_US
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578	en_US
dc.date.issued	2014-12-05	en_US
dc.identifier.citation	Journal of Membrane Science, 2014, 472 pp. 133 - 140	en_US
dc.identifier.issn	0376-7388	en_US
dc.identifier.uri	http://hdl.handle.net/10453/34500
dc.description.abstract	© 2014 Elsevier B.V. Porous polymer membrane with a sandwich-like architecture has been prepared by coating poly(methyl methacrylate) (PMMA) on poly(vinylidene fluoride-co-hexafluoropylene) (PVDF-HFP) porous membranes. Field emission scanning electron microscopy analysis identified that the PMMA/PVDF-HFP porous polymer membrane consists of the stacking of several porous layers with one layer of large pores in the middle of the membrane. This unique sandwich-like structure provides large porosity and good affinity towards a liquid organic electrolyte, leading to a high electrolyte uptake of 342wt%, excellent electrolyte retention, and enhanced tolerance towards high temperature and fire. The gel polymer electrolyte membrane achieved a high ionic conductivity of 1.31mScm-1 with similar activation energy as the conventional Celgard 2400 separator in liquid electrolyte. The porous polymer electrolyte membrane also has an outstanding thermal and electrochemical stability. When applied in lithium ion batteries with LiFePO4 cathode and lithium metal anode, the PMMA/PVDF-HFP electrolyte membrane demonstrated high discharge capacity, enhanced high rate capability, and extended cycle life. The PMMA/PVDF-HFP porous polymer membrane could be employed as an integrated separator and electrolyte for lithium ion batteries with high safety.	en_US
dc.relation.ispartof	Journal of Membrane Science	en_US
dc.relation.isbasedon	10.1016/j.memsci.2014.08.049	en_US
dc.subject.classification	Chemical Engineering	en_US
dc.title	Porous poly(vinylidene fluoride-co-hexafluoropropylene) polymer membrane with sandwich-like architecture for highly safe lithium ion batteries	en_US
dc.type	Journal Article
utslib.citation.volume	472	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Chemistry and Forensic Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	472	en_US

Abstract:

© 2014 Elsevier B.V. Porous polymer membrane with a sandwich-like architecture has been prepared by coating poly(methyl methacrylate) (PMMA) on poly(vinylidene fluoride-co-hexafluoropylene) (PVDF-HFP) porous membranes. Field emission scanning electron microscopy analysis identified that the PMMA/PVDF-HFP porous polymer membrane consists of the stacking of several porous layers with one layer of large pores in the middle of the membrane. This unique sandwich-like structure provides large porosity and good affinity towards a liquid organic electrolyte, leading to a high electrolyte uptake of 342wt%, excellent electrolyte retention, and enhanced tolerance towards high temperature and fire. The gel polymer electrolyte membrane achieved a high ionic conductivity of 1.31mScm-1 with similar activation energy as the conventional Celgard 2400 separator in liquid electrolyte. The porous polymer electrolyte membrane also has an outstanding thermal and electrochemical stability. When applied in lithium ion batteries with LiFePO4 cathode and lithium metal anode, the PMMA/PVDF-HFP electrolyte membrane demonstrated high discharge capacity, enhanced high rate capability, and extended cycle life. The PMMA/PVDF-HFP porous polymer membrane could be employed as an integrated separator and electrolyte for lithium ion batteries with high safety.

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http://hdl.handle.net/10453/34500