Micro-porous P(VDF-HFP)-based polymer electrolyte filled with AlO nanoparticles

Li, Zhaohui; Guang-yao, SU; Wang, Xiayu; Gao, Deshu

doi:10.1016/j.ssi.2005.05.006

Cited by 209 publications

(111 citation statements)

References 19 publications

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“…According to Saito et al [46], there are three possible ways that carrier ions could be transferred within the porous polymer electrolyte: (1) through liquid electrolyte trapped in pores, (2) through an amorphous domain that is swelled by liquid electrolyte, and (3) along molecular chains in the polymer. Since the carrier ion movements along the molecular chains in the polymer is much slower, the increase in ionic conductivity could be attributed to the large amount of trapped liquid electrolyte in the pores that then penetrates into the polymer chains to swell the amorphous domains [23,44,46,47]. The temperature dependence of the ionic conductivity for the polymer electrolyte is presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…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

169

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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: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microporous gel polymer electrolytes for lithium rechargeable battery application

Idris¹,

Rahman²,

Wang³

et al. 2012

Journal of Power Sources

169

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“…Furthermore, these two blocks could form unique patterns with special pathways to increase ionic conductivities. [55] With these improvements, the ionic conductivity of dual-ion GPEs had reached over 10 −3 S cm −1 , [56][57][58] with the tensile strength over 10 MPa [59,60] and the thermal stability over 400 °C. [61] Recently, some other effective strategies have been further reported by immobilizing anions to realize single lithium-ion conducting GPEs or directly introducing redox-active mediators into GPEs.…”

Section: The Performance Improvement Of the Gpesmentioning

confidence: 99%

“…Thus, introducing inorganic particles such as TiO 2 [136][137][138] and Al 2 O 3 [56,139] nanoparticles is another strategy to improve the thermal stability of GPEs. PVDF-HFP and polymethylmethacrylate (PMMA) polymer matrixes have attracted much attention owing to their great mechanical, chemical stability and decent wettability.…”

Section: Gpes With High Thermal Stabilitymentioning

confidence: 99%

Gel Polymer Electrolytes for Electrochemical Energy Storage

Cheng

Pan

Zhao

et al. 2017

Advanced Energy Materials

786

562

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storage devices with adjustable shapes and high flexibility, which is promising for the burgeoning portable and wearable electronics. [7][8][9] Furthermore, the flexibility and elasticity of GPEs are also prone to tolerate the volume change of electrode materials and the dendrites of lithium metal during charge and discharge processes. [10][11][12][13] As a consequence, GPEs have become one of the most desirable alternatives among various electrolytes for the electrochemical energy storage devices, and significant progress has been made in lithium-ion batteries (LIBs), supercapacitors (SCs), lithium-oxygen (Li-O 2 ) batteries as well as the other kinds of electrochemical energy storage devices, such as sodium-ion batteries, lithium-sulfur batteries, fuel cells, and zinc-air batteries. [14][15][16] In order to meet the requirements of wearable devices for flexibility and deformability, more special GPEs with tough, [17] stretchable, [18] and compressible [19] functionalities have been also developed.Typically, a polymeric framework is adopted in GPEs as host material, providing high mechanical integrity. Several criteria for a good polymer host lie in: [20][21][22] (i) fast segmental motion of polymer chain; (ii) special groups promoting the dissolution of salts; (iii) low glass transition temperature (T g ); (iv) high molecular weight; (v) wide electrochemical window; (vi) high degradation temperature. Within the framework, the salts in the GPEs serve as the sources of the charge carriers, which are generally required to have large anions and low dissociation energy for easier dissociating-induced free/mobile ions. According to the types of electrolytes, there are four categories of GPEs based on proton, [23] alkaline, [24] conducting salts, and ionic liquids (ILs). [25] The criteria for an appropriate electrolyte include: [26][27][28] (i) good dissociation without forming ion pairs or ion aggregation; (ii) high thermal, chemical, and electrochemical stability; (iii) high ionic conductivity. In order to dissolve both the polymer hosts and electrolytic salts, the organic/ aqueous solvents are introduced to provide the medium for ionic conduction. A good solvent should simultaneously have high dielectric constant (ɛ > 15), donor number for more dissociation of ion and chemical and electrochemical stability. Organic solvents normally include ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dimethyl formamide (DMF), dimethyl sulphoxide, ethyl methyl carbonate, and tetrahydrofuran.To prepare a high-performance GPE, it is essential to select the species of host polymer, solvent, and electrolytic salt, and then blend them by solution or melt processes, such as casting With the booming development of flexible and wearable electronics, their safety issues and operation stabilities have attracted worldwide attentions. Compared with traditional liquid electrolytes, gel polymer electrolytes (GPEs) are preferred due to their higher safety and adaptability to the design of ...

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“…Some researchers and also our research groups have reported an alternative method to form the porous structure by the phase inversion technique as well as polymer dissolution techniques on the polymer matrix, such as polyacrylonitrile (PAN) [10,11], poly(vinylidene fluoride) (PVdF) [12,13], poly(acrylonitrile-methyl methacrylate) (PAN-MMA) [14,15] and poly(vinylidene fluoride-co-hexa fluoropropylene) P(VdF-co-HFP) [16][17][18][19][20][21], and so forth. Moreover, effect of inorganic oxides such as ZrO 2 nanofiller [22], SiO 2 [23,24], MgO [25], Al 2 O 3 [26] and TiO 2 [27][28][29] on the electrochemical properties of P(VdF-co-HFP) based porous structure polymer electrolytes have been studied. Recently, Rajendran et al [30] reported a solid polymer electrolyte, with the addition of microscale CeO 2 filler in PMMA polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

A New Class of P(VdF-HFP)-CeO2-LiClO4-Based Composite Microporous Membrane Electrolytes for Li-Ion Batteries

Vijayakumar

Karthick

Angaiah

2011

International Journal of Electrochemistry

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Composite microporous membranes based on Poly (vinylidene fluoride-co-hexafluoro propylene) P(VdF-co-HFP)-CeO 2 were prepared by phase inversion and preferential polymer dissolution process. It was then immersed in 1M LiClO 4 -EC/DMC (v/v = 1 : 1) electrolyte solution to obtain their corresponding composite microporous membrane electrolytes. For comparison, composite membrane electrolytes were also prepared by conventional phase inversion method. The surface morphology of composite membranes obtained by both methods was examined by FE-SEM analysis, and their thermal behaviour was investigated by DSC analysis. It was observed that the preferential polymer dissolution composite membrane electrolytes (PDCMEs) had better properties, such as higher porosity, electrolyte uptake (216 wt%), ionic conductivity (3.84 mS·cm −1 ) and good electrochemical stability (4.9 V), than the phase inversion composite membrane electrolytes (PICMEs). As a result, a cell fabricated with PDCME in between mesocarbon microbead (MCMB) anode and LiCoO 2 cathode had better cycling performance than a cell fabricated with PICME.

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Micro-porous P(VDF-HFP)-based polymer electrolyte filled with AlO nanoparticles

Cited by 209 publications

References 19 publications

Microporous gel polymer electrolytes for lithium rechargeable battery application

Microporous gel polymer electrolytes for lithium rechargeable battery application

Gel Polymer Electrolytes for Electrochemical Energy Storage

A New Class of P(VdF-HFP)-CeO2-LiClO4-Based Composite Microporous Membrane Electrolytes for Li-Ion Batteries

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