Phase Behavior and Electrochemical Characterization of Blends of Perfluoropolyether, Poly(ethylene glycol), and a Lithium Salt

Wong, Dominica H. C.; Vitale, Alessandra; Devaux, Didier; Taylor, Austria; Pandya, Ashish; Hallinan, Daniel T.; Thelen, Jacob L.; Mecham, Sue J.; Lux, Simon Franz; Lapides, Alexander M.; Resnick, Paul R.; Meyer, Thomas J.; Kostecki, Robert; Balsara, Nitash P.; DeSimone, Joseph M.

doi:10.1021/cm504228a

Cited by 61 publications

(80 citation statements)

References 39 publications

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“…The conductivity of PFPE with urethane methacrylate end-groups is similar to that of other PFPE electrolytes reported in previous studies [37][38][39][40][41]. The conductivity of POSS_0.30 (the most conductive electrolyte in this study) is higher than that of the PFPE electrolyte by a factor 3.2 ± 0.8 over the entire temperature window, reaching 6.7 × 10 − 5 S/cm at 90°C.…”

Section: Devaux Et Al Solid State Ionics 310 (2017) 71-80supporting

confidence: 87%

“…While the T g of pure PEO is in the vicinity of − 65°C, that of PEO electrolytes with optimal lithium salt concentration is in the vicinity of − 45°C [8,36]. In recent work, we examined the possibility of using mixtures of lithium salts and perfluoropolyethers (PFPEs) as electrolytes for lithium batteries [37][38][39][40][41]. Perfluoropolyethers are non-crystalline, non-flammable short chain polymers with extremely low T g ; the T g of pure PFPEs is in the vicinity of −90°C.…”

Section: Introductionmentioning

confidence: 99%

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Crosslinked perfluoropolyether solid electrolytes for lithium ion transport

et al. 2017

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A B S T R A C TPerfluoropolyethers (PFPE) are commercially available non-flammable short chain polymeric liquids. Endfunctionalized PFPE chains solvate lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt and these mixtures can be used as electrolytes for lithium (Li) batteries. Here we synthesize and characterize a new class of solid PFPE electrolytes. The electrolytes are made by either thermal or UV crosslinking PFPE chains with urethane methacrylate end-groups. For the synthesis of thermally crosslinked electrolytes, polyhedral oligomeric silsesquioxane (POSS) with organic acrylopropyl groups was used as crosslinker agent, while for UV cured electrolytes a photoinitiatior was used. We present thermal, morphological, and electrical data of the solid electrolytes. We compare these properties with those of the two parent liquids (PFPE with urethane methacrylate end-groups and POSS with acrylopropyl groups) mixed with LiTFSI. The solubility limit of LiTFSI in the PFPE-based solids is higher than that in the liquids. The conductivity data are analyzed using the Vogel-Tamman-Fulcher equation. The concentration of effective charge carriers is a strong function of the nature of the solvent (solid versus liquid) whereas the activation energy is neither a strong function of the nature of the solvent nor salt concentration.

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Section: Devaux Et Al Solid State Ionics 310 (2017) 71-80supporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Crosslinked perfluoropolyether solid electrolytes for lithium ion transport

et al. 2017

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“…In 2015, DeSimone et al 214 prepared inherently nonflammable polymer electrolytes by blending a low molecular weight perfluoropolyether (PFPE), PEG, and LiTFSI, and studied systematically the effects of salt concentration and stoichiometry on the thermal and electrochemical properties of electrolytes. The ratio of PFPE and PEG was able to allow for precise control of crystalline melting and glass transition temperature properties.…”

Section: Blend Polymer Electrolytementioning

confidence: 99%

Poly(ethylene oxide)-based electrolytes for lithium-ion batteries

2015

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This article reviews the PEO-based electrolytes for lithium-ion batteries.Poly(ethylene oxide) (PEO) based materials are widely considered as promising candidates of polymer hosts in solid-state electrolytes for high energy density secondary lithium batteries. They have several specific advantages such as high safety, easy fabrication, low cost, high energy density, good electrochemical stability, and excellent compatibility with lithium salt. However, the typical linear PEO does not reach the production requirement because its insufficient ionic conductivity due to the high crystallinity of the ethylene oxide (EO) chains, which can restrain the ionic transition due to the stiff structure especially at low temperature. The scientists have explored different approaches to reduce the crystallinity hence to improve the ionic conductivity of PEO-based electrolytes, including: blending, modifying and making PEO derivatives etc. This review is focused on surveying the recent developments and issues about PEO-based electrolytes for lithium-ion batteries.

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“…They have a linear perfluorinated structure and are synthesized by the photooxidation of tetrafluoroethylene . Thanks to their telechelic structure, Fomblin Z PFPEs and other functional derivatives are used as reactive intermediates in the synthesis of a large range of polymers such as fluorinated polyurethanes, epoxy or polyester resins, photocured, “clicked”, or self‐healable networks, PLA‐PFPE‐PLA triblock copolymers, and electrolytes for lithium batteries …”

Section: Introductionmentioning

confidence: 99%

A Versatile Strategy to Synthesize Perfluoropolyether-Based Thermoplastic Fluoropolymers by Alkyne-Azide Step-Growth Polymerization

Lopez

Améduri

Habas

2016

Macromol. Rapid Commun.

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Perfluoropolyether (PFPE)-based thermoplastic fluoropolymers are synthesized by A2 + B2 step-growth polymerization between PFPE-diyne and fluorinated diazides. This versatile method allows synthesizing PFPE-based materials with tunable physicochemical properties depending on the exact nature of the fluorinated segment of the diazide precursor. Semicrystalline or amorphous materials endowed with high thermostability (≈300 °C under air) and low glass transition temperature (≈-100 °C) are obtained, as confirmed by differential scanning calorimetry, thermogravimetry, and rheometry. Step-growth polymerizations can be copper-catalyzed but also thermally activated in some cases, thus avoiding the presence of copper residues in the final materials. This strategy opens up new opportunities to easily access PFPE-based materials on an industrial scale. Furthermore, a plethora of developments can be envisioned (e.g., by adding a third trifunctional component to the formulations for the synthesis of PFPE-based elastomers).

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Phase Behavior and Electrochemical Characterization of Blends of Perfluoropolyether, Poly(ethylene glycol), and a Lithium Salt

Cited by 61 publications

References 39 publications

Crosslinked perfluoropolyether solid electrolytes for lithium ion transport

Crosslinked perfluoropolyether solid electrolytes for lithium ion transport

Poly(ethylene oxide)-based electrolytes for lithium-ion batteries

A Versatile Strategy to Synthesize Perfluoropolyether-Based Thermoplastic Fluoropolymers by Alkyne-Azide Step-Growth Polymerization

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