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Choi, Nam-Soon
Energy Materials Lab
Research Interests
  • Rechargeable lithium battery, electrolytes for next generation Mg and Na battery

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Novel porous separator based on PVdF and PE non-woven matrix for rechargeable lithium batteries

Cited 81 times inthomson ciCited 81 times inthomson ci
Title
Novel porous separator based on PVdF and PE non-woven matrix for rechargeable lithium batteries
Author
Lee, YMKim, JWChoi, Nam-SoonLee, JASeol, WHPark, JK
Keywords
Cycle performance; Phase inversion; Poly(vinylidene fluoride); Polyethylene non-woven; Rechargeable lithium battery; Separator
Issue Date
2005-01
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.139, no.1-2, pp.235 - 241
Abstract
The novel porous separator based on PVdF (poly(vinylidene fluoride)) and a PE (polyethylene) non-woven matrix is prepared by coating PVdF/NMP solution on the matrix (NMP: N-methyl-2-pyrrolidone). The pore structure is generated in the PVdF region by phase inversion of the polymer solution. The PE non-woven matrix imparts mechanical strength and a thermal shut-down property to the separator, while the PVdF component provides a hydrophilic ionic conducting phase. The physical properties of the separator, such as morphology, pore size and its distribution, porosity and mechanical strength, are measured. The ionic conductivity of the separator is 8.9 x 10(-4) S cm(-1) at 25 degreesC. The capacity at the C/2 rate is maintained at about 86% of the initial value on the 100th cycle at the room temperature. The electrolyte is stable up to 4.5 V in the presence of the novel separator.
URI
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DOI
10.1016/j.jpowsour.2004.06.055
ISSN
0378-7753
Appears in Collections:
ECHE_Journal Papers
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