PVdF-HFP/exfoliated graphene oxide nanosheet hybrid separators for thermally stable Li-ion batteries

Yunah Choi, Kan Zhang, Kyung Yoon Chung, Dong Hwan Wang, Jong Hyeok Park

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We report novel poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP)/graphene oxide (GO) nanocomposite separators for lithium secondary batteries. During phase inversion of PVdF-HFP which is the origin of pore generation, GO nanosheets can be incorporated into the PVdF-HFP skeleton. The battery performances of the cells with the PVdF-HFP/GO nanocomposite separators were greatly improved compared to the pure PVdF-HFP based one. In addition, the thermal stability of the nanocomposite separators is also greatly enhanced by the addition of GO, in which the battery cells with composite separators that are thermally annealed at 150 and 180 °C function well. The inclusion of 2-dimensional GO nanosheets could also enhance the tensile strength of neat PVdF-HFP separators, leading to mechanically stable polymer separators.

Original languageEnglish
Pages (from-to)80706-80711
Number of pages6
JournalRSC Advances
Volume6
Issue number84
DOIs
Publication statusPublished - 2016 Jan 1

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Graphite
Nanosheets
Separators
Oxides
Graphene
Nanocomposites
Secondary batteries
Lithium
polyvinylidene fluoride
Lithium-ion batteries
Polymers
Thermodynamic stability
Tensile strength
Composite materials

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Choi, Yunah ; Zhang, Kan ; Chung, Kyung Yoon ; Wang, Dong Hwan ; Park, Jong Hyeok. / PVdF-HFP/exfoliated graphene oxide nanosheet hybrid separators for thermally stable Li-ion batteries. In: RSC Advances. 2016 ; Vol. 6, No. 84. pp. 80706-80711.
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abstract = "We report novel poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP)/graphene oxide (GO) nanocomposite separators for lithium secondary batteries. During phase inversion of PVdF-HFP which is the origin of pore generation, GO nanosheets can be incorporated into the PVdF-HFP skeleton. The battery performances of the cells with the PVdF-HFP/GO nanocomposite separators were greatly improved compared to the pure PVdF-HFP based one. In addition, the thermal stability of the nanocomposite separators is also greatly enhanced by the addition of GO, in which the battery cells with composite separators that are thermally annealed at 150 and 180 °C function well. The inclusion of 2-dimensional GO nanosheets could also enhance the tensile strength of neat PVdF-HFP separators, leading to mechanically stable polymer separators.",
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PVdF-HFP/exfoliated graphene oxide nanosheet hybrid separators for thermally stable Li-ion batteries. / Choi, Yunah; Zhang, Kan; Chung, Kyung Yoon; Wang, Dong Hwan; Park, Jong Hyeok.

In: RSC Advances, Vol. 6, No. 84, 01.01.2016, p. 80706-80711.

Research output: Contribution to journalArticle

TY - JOUR

T1 - PVdF-HFP/exfoliated graphene oxide nanosheet hybrid separators for thermally stable Li-ion batteries

AU - Choi, Yunah

AU - Zhang, Kan

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AU - Wang, Dong Hwan

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AB - We report novel poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP)/graphene oxide (GO) nanocomposite separators for lithium secondary batteries. During phase inversion of PVdF-HFP which is the origin of pore generation, GO nanosheets can be incorporated into the PVdF-HFP skeleton. The battery performances of the cells with the PVdF-HFP/GO nanocomposite separators were greatly improved compared to the pure PVdF-HFP based one. In addition, the thermal stability of the nanocomposite separators is also greatly enhanced by the addition of GO, in which the battery cells with composite separators that are thermally annealed at 150 and 180 °C function well. The inclusion of 2-dimensional GO nanosheets could also enhance the tensile strength of neat PVdF-HFP separators, leading to mechanically stable polymer separators.

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