Improving the ionic conductivity in nanostructured membranes based on poly(vinyl alcohol) (PVA), chitosan (CS), phosphoric acid (H3PO4), and niobium oxide (Nb2O5)

Functionalized activated carbon supercapacitors were fabricated using [EMIM]BF4 mediated PVA/H3PO4 gel polymer electrolytes. The ionic-liquid [EMIM]BF4 addition in PVA/H3PO4 gel polymer electrolyte demonstrated excellent supercapacitor performances.

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An Investigation of Chitosan-Grafted-Poly(vinyl alcohol) as an Electrolyte Membrane

Journal of Chemistry ◽

10.1155/2013/642871 ◽

2013 ◽

Vol 2013 ◽

pp. 1-9 ◽

Cited By ~ 7

Author(s):

Panu Danwanichakul ◽

Pongchayont Sirikhajornnam

Keyword(s):

Mechanical Properties ◽

Ionic Conductivity ◽

Vinyl Alcohol ◽

Direct Methanol Fuel Cell ◽

Methanol Solution ◽

Methanol Permeability ◽

Poly Vinyl Alcohol ◽

Electrolyte Membrane ◽

Direct Methanol ◽

Methanol Fuel Cell

The membrane of chitosan-grafted-poly(vinyl alcohol)/poly(vinyl alcohol) (CS-g-PVA/PVA) was investigated along with chitosan (CS), PVA, CS/PVA, and Nafion 117 membranes for transport properties of water and methanol, mechanical properties, and ionic conductivity. The ionic conductivity,σ, of the crosslinked CS-g-PVA/PVA membrane was about 4.37 mS cm−1and the methanol permeability,PS, was1.8×10−7 cm2s−1. These gave the selectivity,σ/PS, of 23.95 mS·s·cm−3compared with 16.35 mS·s·cm−3of Nafion 117 membrane. The conductivity of the crosslinked CS-g-PVA/PVA membrane was greater than others including Nafion 117 when the membranes were saturated with methanol solution of which concentration was greater than 20%. This fact and that the mechanical properties of the wet crosslinked CS-g-PVA/PVA membrane were comparable to those of other membranes made it a promising material to be used as an electrolyte membrane in a direct methanol fuel cell.

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Ionic Conductivity Enhancement Studies Of Composite Polymer Electrolyte Based On Poly (Vinyl Alcohol)-Lithium Perchlorate-Titanium Oxide

Advanced Materials Letters ◽

10.5185/amlett.2017.1410 ◽

2017 ◽

Vol 8 (4) ◽

pp. 465-471 ◽

Cited By ~ 9

Author(s):

Chin-Shen. Lim

Keyword(s):

Ionic Conductivity ◽

Polymer Electrolyte ◽

Titanium Oxide ◽

Vinyl Alcohol ◽

Lithium Perchlorate ◽

Poly Vinyl Alcohol ◽

Composite Polymer Electrolyte ◽

Composite Polymer ◽

Conductivity Enhancement

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Electrical Properties of Poly(Vinyl Alcohol) Complexed with Phosphoric Acid

MRS Proceedings ◽

10.1557/proc-135-377 ◽

1988 ◽

Vol 135 ◽

Cited By ~ 8

Author(s):

Ke-Cheng Gong ◽

Huang Shou-Cai

Keyword(s):

Glass Transition ◽

Transition Temperature ◽

Glass Transition Temperature ◽

Electrical Properties ◽

Phosphoric Acid ◽

Vinyl Alcohol ◽

Impedance Measurement ◽

Poly Vinyl Alcohol ◽

Promising Candidate ◽

Polarization Experiment

AbstractThe electrical properties of poly(vinyl alcohol) complexed with phosphoric acid have been studied. It is found that the conductivity increases with the concentration of the acid, and also increases with time if the sample is exposed to the air, which is interpreted in terms of glass transition temperature. A.C. impedance measurement and polarization experiment show that this proton-conducting polymer is a promising candidate for electrochromic display. It is also found that some plasticizers, such as glycerol and ethylene-glycol are effective for improving its conductivity.

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