Stability in alkaline aqueous electrolyte of air electrode protected with fluorinated interpenetrating polymer network membrane - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Power Sources Année : 2015

Stability in alkaline aqueous electrolyte of air electrode protected with fluorinated interpenetrating polymer network membrane

Résumé

We developed original anion exchange membranes to protect air electrodes operating in aqueous lithium-air battery configuration, i.e. supplied with atmospheric air and in concentrated aqueous lithium hydroxide. These protective membranes have an interpenetrating polymer network (IPN) architecture combining a hydrogenated cationic polyelectrolyte network based on poly(epichlorohydrin) (PECH) and a fluorinated neutral network based on perfluoropolyether (Fluorolink ® MD700). Two phases, each one rich in one of the polymer, are co-continuous in the materials. This morphology allows combining their properties according to the weight proportions of each polymer. Thus, PECH/Fluorolink IPNs show ionic conductivity varying from 1 to 2 mS cm À1 , water uptake from 30 to 90 wt.% and anionic transport number from 0.65 to 0.80 when the PECH proportion varies from 40 to 90 wt.%. These membranes have been systematically assembled on air electrodes. Air electrode protected with PECH/Fluorolink 70/30 IPN shows outstanding stability higher than 1000 h, i.e. a 20-fold increase in the lifetime of the non-modified electrode. This efficient membrane/air electrode assembly is promising for development of alkaline electrolyte based storage or production energy systems, such as metal air batteries or alkaline fuel cells.
Fichier non déposé

Dates et versions

hal-03282904 , version 1 (13-07-2021)

Identifiants

Citer

Bruno Bertolotti, Houssam Messaoudi, Linda Chikh, Cedric Vancaeyzeele, Séverine Alfonsi, et al.. Stability in alkaline aqueous electrolyte of air electrode protected with fluorinated interpenetrating polymer network membrane. Journal of Power Sources, 2015, 274, pp.488-495. ⟨10.1016/j.jpowsour.2014.10.059⟩. ⟨hal-03282904⟩
31 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More