Study of polymer electrolytes with grafted Au–γ-Fe2O3 nanoparticles

Goldshtein, Keren; Golodnitsky, D.; Lereah, Y.; Burstein, L.; Peled, E.

doi:10.1016/j.ijhydene.2013.01.170

Cited by 1 publication

(2 citation statements)

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“…An additional approach, aimed at enhancement of ionic conductivity along oriented helical PE chains, proposed in, 98 exploits novel ideas of structuring ionically conducting polymers or molecular polyether building blocks, with grafted magnetic nanoparticles, with the use of a magnetic field. The experimental route being tested is based on the chemisorption of thiolated PEO on core-shell gold-coated maghemite.…”

Section: 91mentioning

confidence: 99%

“…"Shish-kebab" PNT-PE superstructure consisting of fibrous crystals overgrown epitaxially by lamellar crystals, the stems of which are parallel to the fiber axis, would seem to be a preferable configuration. An additional approach, aimed at enhancement of ionic conductivity along oriented helical PE chains, proposed in, 98 exploits novel ideas of structuring ionically conducting polymers or molecular polyether building blocks, with grafted magnetic nanoparticles, with the use of a magnetic field. The experimental route being tested is based on the chemisorption of thiolated PEO on core-shell gold-coated maghemite.…”

Section: Magnetic Field Direction (Z)mentioning

confidence: 99%

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Review—On Order and Disorder in Polymer Electrolytes

Golodnitsky

Strauss

Greenbaum

2015

J. Electrochem. Soc.

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206

135

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This contribution presents an overview of more than three-decades-long studies of the structure and mechanism of ion conduction in polyethylene-oxide-based solid polymer electrolytes. Conductivity in polymer electrolytes has long been viewed as confined to the amorphous phase above the glass-transition temperature (Tg). Above Tg, polymer chain motion creates a dynamic, disordered environment that was thought to play a critical role in facilitating ion transport. Difficulty of finding the amorphous polymer with sufficient ionic conductivity has raised the fundamental question of whether polymer electrolytes are intrinsically inferior to other electrolytes in terms of their charge-transport capability. Recently, enhanced ionic conductivity has been detected in ordered (longitudinally stretched and cast under gradient magnetic field) polymer electrolytes, in crystalline ion-polyether 1:6 complexes and polymer-in-salt electrolytes. These results have opened a new trend in the search for ion transport in solid polymer electrolytes. The very latest publications present new hybrid-and block-co-polymers, a new class of functional materials (polymerized ionic liquids), and new promising approaches aimed at the development of polymer-based superionic conductors with rigid nanochannel architectures that enable rapid ion transport decoupled from segmental relaxation. Solid Polymer Electrolytes-Structure and Mechanism of Ion TransportMuch research deals with high-ionic-conductive polymer electrolytes because of their current and potential applications as electrochromic and temperature-sensitive printed electronics devices, biomedical sensors, supercapacitors, solar cells and batteries. Polymer electrolytes offer pronounced advantages over conventional liquid electrolytes. These include: a versatile shape, mechanical strength and stable contact between the electrode and electrolyte interfaces. In addition, solid electrolytes are safer than liquid electrolytes as they do not have a leakage problem and because of their nontoxic, low-vaporpressure, and non-flammable properties. [1][2][3][4][5][6][7] Ion-polyether complexes (or polymer electrolytes) were first discovered by Fenton, Parker and Wright in 1973. 8 Since then, such complexes have been prepared with many different monatomic ions and indeed many different polymeric ligands. Armand in 1979 recognized that Li + -polyether complexes could be used as solid electrolytes in electrochemical devices. 9The classic polymer electrolyte comprises organic macromolecules (usually polyether polymer) that are complexed with inorganic salts. The polymer matrix must contain a Lewis base (e.g. ethylene-oxide unit, -OCH 2 CH 2 -) to solvate the lithium salt. The salt-solvent mixing entropy consists mainly of two components: translational and configurational. Contrary to the case of water, the mixing entropy for the formation of polymer electrolytes is small or even positive. The incorporation of salts into the polymer inevitably reduces the freedom of polymer-chain motion, thus causing ...

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Section: 91mentioning

confidence: 99%

Section: Magnetic Field Direction (Z)mentioning

confidence: 99%