Ion Effects on Vanadium Transport in Nafion Membranes for Vanadium Redox Flow Batteries. Issue 13 (28th September 2017)

• Record Type: Journal Article
• Authors: Lawton, Jamie S.; Jones, Amanda M.; Tang, Zhijiang; Lindsey, Melanie; Zawodzinski, Thomas
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 13(2017)
• Page Start: A2987
• Page End: A2991
• Publication Date: 2017-09-28
• Subjects: Cross Membrane Diffusion -- Permiability -- Species uptake; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1791712jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Vanadium diffusion through Nafion membranes was investigated under conditions applicable to vanadium redox flow batteries (VRFBs). In this case, we examine the effects of interdiffusion of VO 2+ with protons, V 3+ and VO2 + by a 'cross-diffusion' experiment in which VO 2+ and the other ion diffuse from opposite sides of the membrane. Vanadium concentrations in reservoirs designed to flow solution over both sides of the membrane were monitored using UV/vis and EPR spectroscopies. The permeability of each ion was determined and diffusion coefficients determined from permeability and measurements of ion uptake by the membrane. The VO 2+ permeability is highest when H + is the only ion on the counter side, and decreases in the following order: H + > VO2 + > V 3+ .