Lithium polymer batteries

Scrosati, B.; Neat, Robin J.

doi:10.1007/978-94-011-1568-1_6

Cited by 93 publications

(101 citation statements)

References 28 publications

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“…Additional forces can also be transmitted from alignment effects on the ferromagnetic filler particles in close contact with the chains. SEM micrographs of the cross section of the LiI:P(EO) 3 polymer electrolyte modified by 9% v/v maghemite, cast under magnetic field (Fig. 11), support our suggestion.…”

Section: 91supporting

confidence: 82%

“…At temperatures near the melting point of the PEO, the difference between conductivity values of typically cast and cast under MF decreases. While the tendency in the Arrhenius behavior of LiCF 3 SO 3 :P(EO) 3 PE is similar to that of LiAsF 6 , the conductivity increase induced by applied MF is only five-to tenfold.…”

Section: 91mentioning

confidence: 69%

“…It has been widely reported that nanosized inorganic fillers such as montmorillonite (MMT), SnO 2 , TiO 2 , Al 2 O 3 , SiO 2 , ZnO, BaTiO 3 and SrTiO 3 in the polymer matrix not only improve mechanical strength but also enhance the ion transport of polymer electrolytes. [54][55][56][57][58][59][60][61] The majority of studies indicated a decrease in the glass-transition temperature of PEs in the presence of fillers and direct coupling between the movement of Li + ion and the segmental dynamics of the polymer, both in filler-free and filler-containing PEs.…”

Section: Amorphous Polymer Electrolytesmentioning

confidence: 99%

“…Figures 10a and 10b present Arrhenius plots of total conductivity of LiAsF 6 :P(EO) 3 PEs typically cast without MF and cast under MF. The red curves are those of NdFeB (1.2 Tesla) and the blue curves are of SmCo (0.8 Tesla) magnets.…”

Section: 91mentioning

confidence: 99%

“…The RT conductivity of composite LiI:P(EO) 3 PE cast under MF increases by two orders of magnitude when it is modified by 14% nanosize maghemite (γFe 2 O 3 ) particles. For the LiCF 3 SO 3 -system, the combined effect of nanosize filler and casting under MF results in a conductivity enhancement by a factor of about 30.…”

Section: 91mentioning

confidence: 99%

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Review—On Order and Disorder in Polymer Electrolytes

Golodnitsky

Strauss

Greenbaum

2015

J. Electrochem. Soc.

204

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: 91supporting

confidence: 82%

Section: 91mentioning

confidence: 69%