Characteristics of PVdF-HFP/TiO2 composite membrane electrolytes prepared by phase inversion and conventional casting methods

Kim, Kwang Man; Park, Nam‐Gyu; Ryu, Kwang Sun; Chang, Seung‐Hwan

doi:10.1016/j.electacta.2006.02.038

Cited by 218 publications

(95 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 3(a), MMT has a particle size, with a diameter of 1-2 m. However, the lamellar structure of nano-ppy/OMMT, which has a diameter of approximately 50-100 nm, is evident in Figure 3 the proportion of amorphous region increases. Meanwhile, many micropores are formed among aggregates, which are staggered and interconnect into the membrane [30]. Thereby, nano-ppy/OMMT can decrease the diameter of pores and create a porous structure.…”

Section: Resultsmentioning

confidence: 99%

Effect of Nano-ppy/OMMT on the Physical and Electrochemical Properties of an Ionic Liquid Gel Polymer Electrolyte

Yang

Yao

2018

Journal of Nanomaterials

View full text Add to dashboard Cite

A new type of nanopolypyrrole/organically modified montmorillonite-ionic liquid gel polymer electrolyte (ppy/OMMT-ILGPE) is prepared based on nanopolypyrrole/organically modified montmorillonite (ppy/OMMT), N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PP14TFSI), lithium-bis(trifluoromethanesulfonyl) (LiTFSI), polyvinylidene difluoride (PVDF), methyl methacrylate (MMA), and benzoyl peroxide (BPO) by an in situ method. The effect of nano-ppy/OMMT on the physical and electrochemical properties of an ionic liquid gel polymer electrolyte is demonstrated. The results show that nanoppy/OMMT-ILGPE has a porous structure with a large surface area, and the diameter of the pores on the surface is approximately 1-2 m. The Li + transference number of 0.72 is achieved, and the ionic conductivity reaches up to 1.2 × 10 −3 S/cm at room temperature. Nano-ppy/OMMT-ILGPE has good thermal stability and mechanical properties. Meanwhile, nano-ppy/OMMT-ILGPE has fine cycle performance in the Li|nano-ppy/OMMT-ILGPE|LiNi 1/3 Co 1/3 Mn 1/3 O 2 coin cell. The good electrochemistry performance of nano-ppy/OMMT-ILGPE means that it can act as an ideal gel polymer electrolyte material for lithium ion batteries.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of Nano-ppy/OMMT on the Physical and Electrochemical Properties of an Ionic Liquid Gel Polymer Electrolyte

Yang

Yao

2018

Journal of Nanomaterials

View full text Add to dashboard Cite

show abstract

“…[18] thought that the Fe 3+ _TiO 2 sol contained a large number of hydroxyl radicals to improve the surface polarity, thus to increase the water flux of membrane. Kim et al [19] thought that a definite amount of Fe 3+ _TiO 2 sol was a kind of heterogeneous deposition agent to transfer the finger hole to the mesh hole, thus to decrease the water flux of membrane.…”

Section: Sem Measurementmentioning

confidence: 99%

Characteristics and Preparation of PVDF Catalytic Membrane Modified by Nano-TiO2/Fe3+

Lijun¹,

Li²,

et al. 2013

TOMSJ

View full text Add to dashboard Cite

Abstract:The polyvinylidene fluoride (PVDF)/Fe 3+ -TiO 2 catalytic membrane was prepared by sol-gel method. It was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), FT-IR spectrum (FT-IR), mechanics capability, water flux, pepsin retention, porosity and contact angle etc. The catalytic activity of PVDF/Fe 3+ -TiO 2 catalytic membrane was evaluated by the degradation of refractory dye Orange IV in the presence of H 2 O 2 . The results show that the addition of appropriate nano-sized TiO 2 sol in the preparation of PVDF membrane has greatly improved some properties of the membrane such as microstructure, hydrophilic ability, mechanics intensity and water flux etc. The addition of Fe 3+ ion in the preparation of PVDF membrane has greatly improved its catalytic activity to decompose H 2 O 2 . The catalytic activity of PVDF/Fe 3+ -TiO 2 is increased with the increase of the content of Fe 3+ ion. When the content of Fe 3+ _TiO 2 sol is 21%, the content of Fe 3+ ion is from 0.02% to 0.12%, the discolorization rate of Orange IV in this Fenton-like oxidation is from 61.2% to 90.5%. The catalytic activity of PVDF/Fe 3+ -TiO 2 is not changed with the increase of the content of nano-sized TiO 2 . This kind of PVDF/Fe 3+ -TiO 2 catalytic membrane has not only good filtration efficiency but also good catalytic activity to effectively decompose H 2 O 2 .

show abstract

“…More than a decade ago, Prosini et al [59] reported the development of a composite separator for lithium-ion batteries that utilized Al 2 O 3 , MgO 2 , and LiAlO 2 ceramic particles as fillers for a PVDF-HFP polymer matrix. Among them, Al 2 O 3 became the most popular filler [50,54,56,59,62,63], but TiO 2 [64], CaCO 3 [58], SiO 2 [14,50,54,63,65] and ZrO 2 [50,51,63] have also been used. In general, besides the mentioned oxides and carbonates, also nitrides or carbides of Si, Al, Zr, Sn, Ce or Y have been suggested [50], such as SiC [63].…”

Section: Definition Properties Materialsmentioning

confidence: 99%

Separators - Technology review: Ceramic based separators for secondary batteries

Nestler¹,

Schmid²,

Münchgesang³

et al. 2014

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. Besides a continuous increase of the worldwide use of electricity, the electric energy storage technology market is a growing sector. At the latest since the German energy transition ("Energiewende") was announced, technological solutions for the storage of renewable energy have been intensively studied. Storage technologies in various forms are commercially available. A widespread technology is the electrochemical cell. Here the cost per kWh, e. g. determined by energy density, production process and cycle life, is of main interest. Commonly, an electrochemical cell consists of an anode and a cathode that are separated by an ion permeable or ion conductive membranethe separator -as one of the main components. Many applications use polymeric separators whose pores are filled with liquid electrolyte, providing high power densities. However, problems arise from different failure mechanisms during cell operation, which can affect the integrity and functionality of these separators. In the case of excessive heating or mechanical damage, the polymeric separators become an incalculable security risk. Furthermore, the growth of metallic dendrites between the electrodes leads to unwanted short circuits. In order to minimize these risks, temperature stable and non-flammable ceramic particles can be added, forming so-called composite separators. Full ceramic separators, in turn, are currently commercially used only for high-temperature operation systems, due to their comparably low ion conductivity at room temperature. However, as security and lifetime demands increase, these materials turn into focus also for future room temperature applications. Hence, growing research effort is being spent on the improvement of the ion conductivity of these ceramic solid electrolyte materials, acting as separator and electrolyte at the same time. Starting with a short overview of available separator technologies and the separator market, this review focuses on ceramic-based separators. Two prominent examples, the lithium-ion and sodium-sulfur battery, are described to show the current stage of development. New routes are presented as promising technologies for safe and long-life electrochemical storage cells.

show abstract

Characteristics of PVdF-HFP/TiO2 composite membrane electrolytes prepared by phase inversion and conventional casting methods

Cited by 218 publications

References 33 publications

Effect of Nano-ppy/OMMT on the Physical and Electrochemical Properties of an Ionic Liquid Gel Polymer Electrolyte

Effect of Nano-ppy/OMMT on the Physical and Electrochemical Properties of an Ionic Liquid Gel Polymer Electrolyte

Characteristics and Preparation of PVDF Catalytic Membrane Modified by Nano-TiO2/Fe3+

Separators - Technology review: Ceramic based separators for secondary batteries

Contact Info

Product

Resources

About