Crosslinkable fumed silica-based nanocomposite electrolytes: role of methacrylate monomer in formation of crosslinked silica network

Yerian, Jeffrey Alan; Khan, Saad A.; Fedkiw, Peter S.

doi:10.1016/j.jpowsour.2004.03.064

Cited by 9 publications

(11 citation statements)

References 65 publications

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“…Crosslinkable components are considered to form polymers with the network structure, with the aim of improving the mechanical properties of the resulting GPEs. 15, 16…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of novel crosslinked poly[glycidyl methacrylate–poly(ethylene glycol) methyl ether methacrylate] as gel polymer electrolytes

Luo

Yang

2011

J of Applied Polymer Sci

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In this study, glycidyl methacrylate was copolymerized with poly(ethylene glycol) methyl ether methacrylate to obtain a copolymer {poly[glycidyl methacrylate-poly(ethylene glycol) methyl ether methacrylate] [P(GMA-PEGMA)]}, which was crosslinked with a,xdiamino poly(propylene oxide) (Jeffamine) at various weight ratios and molecular weights to form novel gel polymer electrolytes (GPEs). The crosslinked copolymers were characterized by Fourier transform infrared spectroscopy and thermal analysis. The crosslinked polymers were amorphous in the pristine state and became crystallized after they were doped with lithium electrolyte. Furthermore, the crosslinking degree of the crosslinked polymers increased with increasing weight ratio of Jeffamine, and both the swelling properties and mechanical behaviors of the crosslinked polymers were heavily affected by the weight ratio and molecular weight of Jeffamine. The ionic conductivity (r) of the GPEs from the crosslinked copolymers was determined by alternating-current impedance spectroscopy. A higher molecular weight and increased weight ratio of Jeffamine resulted in a higher r. The GPE based on P(GMA-PEGMA) crosslinked with an equal weight of Jeffamine D2000 exhibited the highest r of 8.29 Â 10 À4 S/cm at 25 C and had a moderate mechanical strength. These crosslinked copolymers could be potential candidates for the construction of rechargeable lithium batteries.

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“…Crosslinkable components are considered to form polymers with the network structure, with the aim of improving the mechanical properties of the resulting GPEs. 15, 16…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of novel crosslinked poly[glycidyl methacrylate–poly(ethylene glycol) methyl ether methacrylate] as gel polymer electrolytes

Luo

Yang

2011

J of Applied Polymer Sci

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“…In more recent works, Lee et al studied the possibility of generating in situ fine silica particles dispersed in the PEO matrix [21] as well as of functionalization of silica surface with glycol chains [25]. Application of crosslinkable silicas modified with certain methacrylate monomers was also reported [26].…”

Section: Introductionmentioning

confidence: 99%

Precipitated silica as filler for polymer electrolyte based on poly(acrylonitrile)/sulfolane

Kurc

2014

J Solid State Electrochem

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The aim of the present work was to perform a preliminary study of the physicochemical properties of hybrid organic-inorganic gel electrolytes for Li-ion batteries based on the PAN/TMS -poly(acrylonitrile)/sulfolane -polymeric matrix and surface-modified precipitated silicas. Modifications were done by means of the so-called dry method using silane U-511 3-methacryloxypropyltrimetoxysilane. Scanning electron microscopy (SEM), noninvasive back scattering method (NIBS), specific surface area (BET), the degree of modification of the silica fillers-Fourier-transform infrared spectroscopy (FT-IR), impedance analysis, and charging/ discharging were carried out. It is found that the silica fillers were homogeneously dispersed in the polymeric matrix, which enhanced conductivity and electrochemical stability of porous polymer electrolytes. Applicability of the prepared gel electrolytes for the Li-ion technology was estimated on the basis of specific conductivity measurements. It was shown that modification of the silica surface by the silane causes an increase in the gel-specific conductivity by about 2 orders of magnitude as compared to gel with unmodified silica.

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“…12,13 Compositions with these modified silicas were cross-linked by ultraviolet (UV) light to give rubbery solids with improved mechanical properties (modulus of 200 kPa and yield stress of 7 kPa); however, the conductivity and interfacial stability with the electrolytes were somewhat lowered. 12,13 Another class of gelling agents less commonly used for gel electrolytes are small-molecule organogelators, which form nanofibrillar networks in solvents by self-assembly. 14−17 A wide range of organogelators are known, and several of these are capable of gelling polar solvents of the kind used in Li-ion batteries.…”

Section: ■ Introductionmentioning

confidence: 99%

Synergistic Gelation of Silica Nanoparticles and a Sorbitol-Based Molecular Gelator to Yield Highly-Conductive Free-Standing Gel Electrolytes

Basrur

Guo

Wang

et al. 2013

ACS Appl. Mater. Interfaces

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Lithium-ion batteries have emerged as the preferred type of rechargeable batteries, but there is a need to improve the performance of the electrolytes therein. Specifically, the challenge is to obtain electrolytes with the mechanical rigidity of solids but with liquid-like conductivities. In this study, we report a class of nanostructured gels that are able to offer this unique combination of properties. The gels are prepared by utilizing the synergistic interactions between a molecular gelator, 1,3:2,4-di-O-methyl-benzylidene-d-sorbitol (MDBS), and a nanoscale particulate material, fumed silica (FS). When MDBS and FS are combined in a liquid consisting of propylene carbonate with dissolved lithium perchlorate salt, the liquid electrolyte is converted into a free-standing gel due to the formation of a strong MDBS-FS network. The gels exhibit elastic shear moduli around 1000 kPa and yield stresses around 11 kPa-both values considerably exceed those obtainable by MDBS or FS alone in the same liquid. At the same time, the gel also exhibits electrochemical properties comparable to the parent liquid, including a high ionic conductivity (~5 × 10(-3) S/cm at room temperature) and a wide electrochemical stability window (up to 4.5 V).

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Crosslinkable fumed silica-based nanocomposite electrolytes: role of methacrylate monomer in formation of crosslinked silica network

Cited by 9 publications

References 65 publications

Preparation and characterization of novel crosslinked poly[glycidyl methacrylate–poly(ethylene glycol) methyl ether methacrylate] as gel polymer electrolytes

Preparation and characterization of novel crosslinked poly[glycidyl methacrylate–poly(ethylene glycol) methyl ether methacrylate] as gel polymer electrolytes

Precipitated silica as filler for polymer electrolyte based on poly(acrylonitrile)/sulfolane

Synergistic Gelation of Silica Nanoparticles and a Sorbitol-Based Molecular Gelator to Yield Highly-Conductive Free-Standing Gel Electrolytes

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