Titre du document / Document title

Studies on polypyrrole modified nafion membrane for vanadium redox flow battery

Auteur(s) / Author(s)

JIE ZENG ⁽¹⁾ ; CHUNPING JIANG ⁽¹⁾ ; YAOHUI WANG ⁽¹⁾ ; JINWEI CHEN ⁽¹⁾ ; SHIFU ZHU ⁽¹⁾ ; BEIJUN ZHAO ⁽¹⁾ ; RUILIN WANG ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ College of Materials Science and Engineering, Sichuan University, 610065, CHINE

Résumé / Abstract

In order to prevent the vanadium crossover and preferential water transfer in all-vanadium redox flow battery (VRFB), three methods - electrolyte soaking, oxidation polymerisation and Electrodeposition, were used to modify Nafion 117 membranes using pyrrole. The surface of the modified membranes was uniform and even, and the membranes were characterised in terms of morphology, membrane area resistance, vanadium permeability and water transfer property. The properties of all the modified membranes were improved greatly. The membranes modified by Electrodeposition showed a best combination of the membrane resistance, vanadium permeability and water transfer property, the experimental results showed that the V(IV) ion permeability of polypyrrole modified Nafion membranes by Electrodeposition at the conditions of 0.025mA cm^-2 and 0°C for 60 min reduced more than 5 times from 2.87 × 10^-6 cm² min^-1 to 5.0 x 10^-7cm² min^-1, and the water transfer property decreased more than 3 times from 0.72 ml/72 h cm² to 0.22 ml/72 h cm². All above properties made the modified Nafion membranes more applicative in the VRFB system. This paper also reported other methods for Nafion membrane modification and the influences of the deposition conditions on the properties of the membrane selectivity and water transfer.

Revue / Journal Title

Electrochemistry communications   ISSN 1388-2481 

Source / Source

2008, vol. 10, n^o3, pp. 372-375 [4 page(s) (article)] (6 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Amsterdam, PAYS-BAS  (1999) (Revue)

Mots-clés anglais / English Keywords

Transition metal ; Flow battery ; Electrical properties ; Morphology ; Surface structure ; Sulfonate copolymer ; Ionomer ; Tetrafluoroethylene copolymer ; Conducting polymers ; Cation exchange membrane ; Proton conductivity ; Ionic conductivity ; Electrochemical polymerization ; Scanning electron microscopy ; Aqueous solution ; Modified material ; Water ; Permeability ; Redox couple ; Vanadium ; Pyrrole polymer ;

Mots-clés français / French Keywords

Métal transition ; Batterie circulation ; Nafion ; Propriété électrique ; Morphologie ; Structure surface ; Sulfonate copolymère ; Ionomère ; Ethylène(tétrafluoro) copolymère ; Polymère conducteur ; Membrane échangeuse cation ; Conductivité protonique ; Conductivité ionique ; Polymérisation électrolytique ; Microscopie électronique balayage ; Solution aqueuse ; Matériau modifié ; Eau ; Perméabilité ; Couple redox ; Vanadium ; Pyrrole polymère ;

Mots-clés espagnols / Spanish Keywords

Metal transición ; Propiedad eléctrica ; Morfología ; Estructura superficie ; Sulfonato copolímero ; Ionómero ; Etileno(tetrafluoro) copolímero ; Membrana cambiadora catiónica ; Conductividad protónica ; Conductividad iónica ; Polimerización electrolítica ; Microscopía electrónica barrido ; Solución acuosa ; Material modificado ; Agua ; Permeabilidad ; Pareja redox ; Vanadio ; Pirrol polímero ;

Mots-clés d'auteur / Author Keywords

Vanadium redox flow battery ; Nafion membranes modified by polypyrrole (PPR) ; Electrodeposition ; Ion permeability ; Water transfer property ;

Localisation / Location

INIST-CNRS, Cote INIST : 26863, 35400016175763.0050