Structural and physical impacts of nanofillers in ionogels: A comprehensive overview

Farooq, Sobia; Razzaq, Humaira; Razzaque, Shumaila; Khan, Bilal Ahmad; Qaisar, Sara

doi:10.1002/pc.25071

Cited by 16 publications

(6 citation statements)

References 147 publications

(173 reference statements)

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“…Nanofillers are incorporated into ionogels mainly to improve their thermal and mechanical properties. The detailed review of the fabrication of hybrid materials with special attention paid to polymer-based ionogels is presented in [ 23 ]. The incorporation of inorganic nanoparticles (mainly modified silica) into the ionogels can counterbalance the plasticizing effect of flexible thioether linkages and/or high IL loadings while preserving ionogel flexibility.…”

Section: Introductionmentioning

confidence: 99%

Modification of Thiol-Ene Ionogels with Octakis(methacryloxypropyl) Silsesquioxane

et al. 2021

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The effect of polyhedral oligomeric silsesquioxane (POSS) on the synthesis and properties of hybrid organic–inorganic ionogels was investigated using octakis(methacryloxypropyl) silsesquioxane (methacryl-POSS). Ionogels were prepared in situ by thiol-ene photopolymerization of triallyl isocyanurate with pentaerythritol tetrakis(3-mercaptopropionate) in a mixture of imidazolium ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMImNTf2) and propylene carbonate (PC). Investigations included the kinetics of hybrid materials formation and selected physical and mechanical properties. The disadvantage of ionogels without the methacryl-POSS modifier is leakage and insufficient mechanical properties. Modifying the thiol-ene matrix by the addition of methacryl-POSS made it possible to obtain non-leaking ionogels with improved mechanical and conductive properties. The steric hindrance of POSS cages and high-density network formation played important roles in ionogel synthesis: decrease of polymerization rate (with almost no effect on conversion), as well as dimensions of the formed polymer spheres during dispersion polymerization (highly cross-linked polymer has poorer solubility in polymerizing medium at a similar conversion, and nucleation begins at lower conversion), an increase of glass transition temperature and puncture strength. Hybrid ionogels with high ionic conductivity in the range of 4.0–5.1 mS∙cm−1 with the maximum parameter for 1.5 wt.% addition of the methacryl-POSS were obtained, which can be associated with ion-pair dissociations in ionic liquid clusters caused by methacryl-POSS.

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Section: Introductionmentioning

confidence: 99%

Modification of Thiol-Ene Ionogels with Octakis(methacryloxypropyl) Silsesquioxane

et al. 2021

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“…Hence, the promotion of mechanical properties is still necessary. Molecular interactions among the components inside the ionogel, such as hydrogen bond, van der Waals force, and electrostatic interaction, dominate the mechanical performance of ionogels [164] . The mechanical strength of ionogel electrolytes can be improved by adding inorganic fillers, [158,165,166] using copolymer, supermolecules, [150] or PIL [149] as the organic matrix, using a porous membrane as the support, and developing new materials such as MOFs [167–169] …”

Section: Improvement Of Ionogel Electrolytesmentioning

confidence: 99%

Hybrid Ionogel Electrolytes for Advanced Lithium Secondary Batteries: Developments and Challenges

Tao

et al. 2022

Chemistry An Asian Journal

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Incidents in the use of lithium-ion batteries are usually caused by the malfunction of flammable organic liquid electrolytes with poor thermal stability. Therefore, the development of noncombustible electrolytes is regarded as one of the most effective means to prevent the safety hazards of lithium-ion batteries. Ionic liquids have attracted much interest recently, mainly due to their high ionic conductivity, low volatility, and incombustibility. The application of ionic liquids to the preparation of quasi-solid-state gel electrolytes combines the advantages of ionic liquids and avoids the risks of organic liquid electrolytes. Therefore, the solid-state ionogels have been considered as a promising alternative electrolyte system, especially for the much-desired energy storage devices with higher energy density and flexibility. This review focuses on the recent progress of ionogel electrolytes for lithium-ion batteries. The preparation strategies for ionogel electrolytes based on different frameworks, namely inorganic matrix, organic matrix, and organicinorganic hybrid matrix, are discussed. Subsequently, efforts to improve the properties of the ionogel electrolytes, including the ionic conductivity, mechanical properties, and lithium-ion transfer number, are summarized. Besides, the applications of ionogel electrolytes in high-voltage lithiumion batteries and lithium metal batteries as well as the batteries under extreme environments are outlined. Finally, the perspectives on studying and improving the performances of ionogel electrolytes for advanced lithium-ion batteries are provided.

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“…The ionogels have many industrial applications for example, in lithium-ion batteries, fuel cells, electrochromic materials, dye-sensitized solar cells (DSSCs) for solar energy conversion, electrochemical double layer capacitors (EDLCs), and actuators [29][30][31][32][33][34]. Moreover, applications of ionogels as thermoelectric materials have never been listed in several review reports published on applications of ionogels [35][36][37][38].…”

Section: Zt = (S 2 σT)/kmentioning

confidence: 99%

Crosslinked thermoelectric hydro-ionogels: A new class of highly conductive thermoelectric materials

Sajid

Sabri

Said

et al. 2019

Energy Conversion and Management

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In this work, a new class of highly-conductive chemically cross-linked gel has been synthesized by the confinement of water and IL N, N, N triethyl octyl ammonium bromide ([N 2228 ] Br) in polyethylene glycol dimethacrylate (PEGDMA) matrix, using in situ thermally initiated radical polymerization loaded with 1 wt. % free radical initiator azobisisobutyronitrile (AIBN). This novel gel was named as hydroionogel (HIG). The thermoelectric properties of HIG such as ionic conductivity, Seebeck coefficient, and thermal conductivity were measured and owing to its high thermoelectric performance, we referred to this as crosslinked thermoelectric hydro-ionogel, henceforth will be denoted by X-TEHIG. For all the measurements, coin cells were fabricated using commercial LIR 2032 stainless steel battery casings with X-TEHIG sandwiched between the two graphene electrodes. The ionic conductivity of X-TEHIG was examined via AC impedance spectroscopy technique by using a Gamry apparatus. Remarkably, the ionic conductivity of X-TEHIG was higher than that of neat [N 2228 ] Br. A linear increase in ionic conductivity of X-TEHIG as a function of temperature was recorded that showed a considerably higher value of 74 mScm -1 at 70 °C. The origin of this high conductivity is attributed to interactions between PEGDMA monomers and cations and anions of the IL and formation of hydrogen bonds between water and Branion, O-H•••Br -. X-TEHIG demonstrated a higher Seebeck coefficient of 1.38 mVK -1 . The Fourier transform infrared (FTIR) spectroscopy results revealed the successful polymerization of X-TEHIG by the disappearance of C=C peak of methacrylate group in the spectrum of PEGDMA. These results suggest that X-TEHIG may be a potential candidate for thermoelectric applications owing to their high values of ionic conductivity and Seebeck coefficient.

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Structural and physical impacts of nanofillers in ionogels: A comprehensive overview

Cited by 16 publications

References 147 publications

Modification of Thiol-Ene Ionogels with Octakis(methacryloxypropyl) Silsesquioxane

Modification of Thiol-Ene Ionogels with Octakis(methacryloxypropyl) Silsesquioxane

Hybrid Ionogel Electrolytes for Advanced Lithium Secondary Batteries: Developments and Challenges

Crosslinked thermoelectric hydro-ionogels: A new class of highly conductive thermoelectric materials

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