Composite polyether based solid electrolytes

Wieczorek, W.; Florjańczyk, Zbigniew; Stevens, J. R.

doi:10.1016/0013-4686(95)00172-b

Cited by 364 publications

(233 citation statements)

References 13 publications

Supporting

Mentioning

221

Contrasting

Unclassified

Order By: Relevance

“…We should like to point out that many researchers have found that lithiumion hopping is believed to occur in a sequential manner on the skin areas of ceramic fillers. [100][101][102] Wieczorek et al 56 applied the Lewis acid−base theory to explain the conductivity enhancement in the case of inorganic-nanoparticle-filled polymer electrolyte. It was proposed that greater affinity can be expected between ClO 4 − and acidic groups on the surface of nano-oxides.…”

Section: 91mentioning

confidence: 99%

Review—On Order and Disorder in Polymer Electrolytes

Golodnitsky

Strauss

Greenbaum

2015

J. Electrochem. Soc.

206

135

View full text Add to dashboard Cite

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 ...

show abstract

Section: 91mentioning

confidence: 99%

Review—On Order and Disorder in Polymer Electrolytes

Golodnitsky

Strauss

Greenbaum

2015

J. Electrochem. Soc.

206

135

View full text Add to dashboard Cite

show abstract

“…The increase in conductivity by addition of filler nanoparticles is attributed to an increase in the highly conductive amorphous phase on the grain matrix border the thickness of which determines the overall conductivity of the matrix by leading to an easy flow path for current which is concentrated in the percolation paths formed by the grain shells. 13 Hong et al 14 have reported earlier a novel PDMS capillary filled with agarose matrix for DNA separation using an electric field of 71.4 V/cm. In our work, we have used agarose matrices doped with filler metal nanoparticles in PDMS micro-capillaries for size fractionating nucleic acids with electric fields as low as 25 V/cm.…”

Section: Introductionmentioning

confidence: 99%

Low Voltage Capillary Electrophoresis Using High Conductivity Agarose Nano-Platinum Composites

Bhattacharya¹,

Gangopadhyay²,

Chanda³

et al. 2008

sens lett

View full text Add to dashboard Cite

Micro-channel based electrophoretic separation systems are commonly used in gene sequencing and analysis. A significant amount of research has focused on the development of fast and high resolution separation systems as part of miniaturized genotyping platforms. These devices are not suitable for field deployment due to their high voltage requirements for micro-channel based electrophoresis. In order to address this issue, we have developed and tested a new agarose gel doped with nanoplatinum for conducting capillary electrophoresis in micro capillaries at low electric field values. The platinum nanoparticles reduce the gel resistance of the agarose gels by 3-4 fold. We have further observed a faster movement of DNA band in this novel gel material allowing a reduction of the fractionating electric field within Poly dimethyl Siloxane (PDMS) capillaries. Impedance studies performed on this new gel material indicate a 1.34 times increase in the dielectric constant of the medium as a result of doping by nano-particles and a 37% reduction in the resistance. We believe that the higher conductivity of the medium and an increased dielectric constant of the medium result in increased ionic mobility within this material. We have also compared the stain mobility values in glass PDMS capillaries of a 1 kbp ladder, and a 750 bp dS DNA segment and have successfully obtained electrophoresis within the micro-channels at a lower electric field (25 V/cm).

show abstract

“…With an increase in the filler concentrations the thickness of this shell along the grain boundaries increases leading to an easy flow path for current which is concentrated in the percolation paths formed by the grain shells. 16 In this work, we have developed a protocol for doping agarose gels with externally synthesized platinum nano-particles. 17 The platinum particles used in this work were chemically synthesized using a standard reduction process and are doped into agarose gel.…”

Section: Introductionmentioning

confidence: 99%

Enhanced DNA Separation Rates in Nano-Platinum Doped Agarose

Bhattacharya¹,

Chanda²,

Liu³

et al. 2008

j bionanosci

View full text Add to dashboard Cite

In this work, nanoparticle-doped matrices for DNA separation at low voltages are described. High conductivity agarose gels doped with platinum nano-particles have been synthesized and characterized by TEM, EDS and SEM. This new doping technique for agarose gels enhances the dielectric constant of the gels by up to 1.5 folds as compared to undoped gel, decreases the resistance (from 97 ohms to about 60 ohms) and increases DNA mobility by 1.5 times (from 6 6 × 10 −5 cm 2 /V · sec to 9 3 × 10 −5 cm 2 /V · sec) at lower operating electric fields (8 V/cm). We believe that the faster movement of DNA arises from an increased dielectric constant and a reduced resistance of the doped material resulting in increased ionic mobility. Using image analysis tools, we have also observed that there is no band broadening effects in the platinum doped gel sample, which indicate no appreciable temperature rise due to incorporation of platinum nanoparticles in agarose gel.

show abstract

Composite polyether based solid electrolytes

Cited by 364 publications

References 13 publications

Review—On Order and Disorder in Polymer Electrolytes

Review—On Order and Disorder in Polymer Electrolytes

Low Voltage Capillary Electrophoresis Using High Conductivity Agarose Nano-Platinum Composites

Enhanced DNA Separation Rates in Nano-Platinum Doped Agarose

Contact Info

Product

Resources

About