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Hybrid Composite Membranes Based on Polyethylene Separator and Al2O3 Nanoparticles for Lithium-Ion Batteries

Title
Hybrid Composite Membranes Based on Polyethylene Separator and Al2O3 Nanoparticles for Lithium-Ion Batteries
Author
김동원
Keywords
Al2O3; Composite Membrane; Li-Ion Battery; Nanoparticle
Issue Date
2013-05
Publisher
American Scientific Publishers
Citation
Journal of nanoscience and nanotechnology, 2013, 13(5), P.3705-3710
Abstract
A hybrid composite membrane is prepared by coating nano-sized Al2O3 powder (13 and 50 nnn) and poly(vinylidene fluoride-co-hexafluoropropene) (P(VdF-co-HFP)) binder on both sides of polyethylene separator. The composite membrane shows better thermal stability and improved wettability for organic liquid electrolyte than polyethylene separator, due to the presence of heat-resistant Al2O3 particles with high-surface area in the coating layer. By using the composite membrane, the lithium-ion cells composed of carbon anode and LiNi1/3Co1/3Mn1/3O2 cathode are assembled and their cycling performances are evaluated. The cells assembled with the composite membranes are proven to have better capacity retention than the cell prepared with polyethylene separator, due to the enhanced ability to retain the electrolyte solution in the cell. The cell assembled with the composite membrane containing 13 nm-sized Al2O3 particles has an initial discharge capacity of 173.2 mA h g(-1) with good capacity retention.
URI
http://www.ingentaconnect.com/content/asp/jnn/2013/00000013/00000005/art00106http://hdl.handle.net/20.500.11754/52077
ISSN
1533-4880
DOI
10.1166/jnn.2013.7254
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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