A porous polymer electrolyte based on P(VDF-HFP) prepared by a simple phase separation process

Li, G.C.; Zhang, P.; Zhang, H.P.; Yang, Liting; Wu, Yuping

doi:10.1016/j.elecom.2008.09.035

Cited by 73 publications

(13 citation statements)

References 25 publications

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“…This irreversible capacity was considered to be due 6(c), it was found that the polymer electrolyte is stable up to 4.7 V, which meets the requirement for a practical lithium-ion battery. This is consistent with other reported gelled polymer electrolytes, since the electrochemical oxidation potential is mainly due to the absorbed liquid electrolyte [3,22,47,48,53]. Further research is necessery to improve the high rate performance of the lithium-ion batteries.…”

Section: Resultssupporting

confidence: 80%

“…However, the extraction process of dibutyl phthalate (DBP) needs large volumes of organic solvents, which increases the production costs, and the removal of DBP is not 100 % efficient [22][23][24]. On the other hand, Pasquier et al [25] have shown that the phase-inversion method is a valid method to use in preparing microporous PVDF-HFP co-polymers by casting a polymer solution and evaporating the solvent and nonsolvent.…”

Section: Introductionmentioning

confidence: 99%

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Microporous gel polymer electrolytes for lithium rechargeable battery application

Idris¹,

Rahman²,

Wang³

et al. 2012

Journal of Power Sources

168

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Microporous poly(vinylidene fluoride)/poly(methyl methacrylate) (PVDF/PMMA) membranes were prepared using the phase-separation method. Then, the membranes were immersed in liquid electrolyte to form polymer electrolytes. The effects of PMMA on the morphology, degree of crystallinity, porosity, and electrolyte uptake of the PVDF membrane were studied. The addition of PMMA increased the pore size, porosity and electrolyte uptake of the PVDF membrane, which in turn increased the ionic conductivity of the polymer electrolyte. The maximum ionic conductivity at room temperature was 1.21 × 10−3 S cm−1 for Sample E70. The polymer electrolyte was investigated, along with lithium iron phosphate (LiFePO4) as cathode for all solid-state lithium-ion rechargeable batteries. The lithium metal/E70/LiFePO4 cell yielded a stable discharge capacity of 133 mAh g−1 after up to 50 cycles at a current density of 8.5 mA g−1. AbstractMicroporous poly(vinylidene fluoride)/ poly(methyl methacrylate) (PVDF/PMMA) membranes were prepared using the phase-separation method. Then, the membranes were immersed in liquid electrolyte to form polymer electrolytes. The effects of PMMA on the morphology, degree of crystallinity, porosity, and electrolyte uptake of the PVDF membrane were studied. The addition of PMMA increased the pore size, porosity and electrolyte uptake of the PVDF membrane, which in turn increased the ionic conductivity of the polymer electrolyte. The maximum ionic conductivity at room temperature was

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Microporous gel polymer electrolytes for lithium rechargeable battery application

Idris¹,

Rahman²,

Wang³

et al. 2012

Journal of Power Sources

168

View full text Add to dashboard Cite

show abstract

“…[5][6][7] Although it appears as a simple preparation method, it is actually an extremely complex process. The most-studied systems are porous polyvinylidene fluoride (PVDF) or PVDF copolymer [8][9][10][11][12][13][14] and polyacrylonitrile (PAN) or PAN copolymer, [15][16][17][18] which have been prepared by using the phase inversion technique and have been evaluated as separators.…”

Section: Introductionmentioning

confidence: 99%

Large‐Scale Separators Based on Blends of Aromatic Polyethers with PEO for Li‐Ion Batteries: Improving Thermal Shrinkage and Wettability Behavior

et al. 2014

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The development of large‐scale separators with tuned microporous structures and surface areas up to 0.56 m2 are demonstrated for application to Li‐ion batteries. The different separators developed are based on blends composed of aromatic polyethers containing different functional groups that can interact with lithium cations and poly(ethylene oxide) (PEO). The porous structures that are prepared after the partial removal of PEO by water treatment can be fine‐tuned by manipulating the blend composition and aromatic polyether structure. In particular, the miscibility effect on pore formation is thoroughly studied. The prepared separators are highly porous (38–63 %), show good air permeability (comparable Gurley values to commercially available polyolefin separators), and increased wettability to conventional liquid electrolytes. In addition, these separators show improved thermal shrinkage behavior and high thermal stability compared to the commercially available polyolefin separators. LiFePO4/C cells using the novel separators show good performance and retain 93 % of their initial discharge capacity after 166 cycles, thus offering excellent stability for long‐term operation. The aromatic‐polyether‐based chemistry of the prepared separators plays a key role in providing the separator with the aforementioned advantageous characteristics, enabling them to be an interesting alternative to conventional polyolefin‐based separators.

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“…With the addition of 20 wt.% EMITf in the 90PVdF-HFP:10Mg(Tf) 2 system, the size of pores is increased and the pores are interconnected. The interconnections between pores are favorable for ionic transportation or ionic conduction because the mobile ions or polymer chain segments can migrate more easily along the internal free surfaces as compared with their bulk migration[30]. Furthermore, when the EMITf concentration is increased from 20 to 40 wt.%, the pore size and pore-pore interconnection are significantly increased, leading to a higher ionic conductivity for the 40 wt.% EMITf ionic liquid gel polymer electrolyte.…”

mentioning

confidence: 99%

A study of structural, electrical and electrochemical properties of PVdF-HFP gel polymer electrolyte films for magnesium ion battery applications

Tang

Ravi

Zhang

et al. 2016

Journal of Industrial and Engineering Chemistry

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A porous polymer electrolyte based on P(VDF-HFP) prepared by a simple phase separation process

Cited by 73 publications

References 25 publications

Microporous gel polymer electrolytes for lithium rechargeable battery application

Microporous gel polymer electrolytes for lithium rechargeable battery application

Large‐Scale Separators Based on Blends of Aromatic Polyethers with PEO for Li‐Ion Batteries: Improving Thermal Shrinkage and Wettability Behavior

A study of structural, electrical and electrochemical properties of PVdF-HFP gel polymer electrolyte films for magnesium ion battery applications

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