Alkaline all iron redox flow battery with a polyethylene/poly(styrene-co-divinylbenzene) interpolymer cation-exchange membrane. Issue 73 (18th December 2020)

• Record Type: Journal Article
• Authors: Sreenath, Sooraj; Sharma, Nitish Kumar; Nagarale, Rajaram K.
• Is Part Of: RSC advances. Volume 10:Issue 73(2020)
• Page Start: 44824
• Page End: 44833
• Publication Date: 2020-12-18
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra08316j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A polyethylene styrene–DVB interpolymer cation exchange membrane is reported for use in a highly alkaline all iron redox flow battery. Abstract : This work describes the suitability of a polyethylene styrene–DVB based interpolymer cation exchange membrane for use in a highly alkaline redox flow battery (RFB) with a [Fe(TEA)OH] 2− /[Fe(TEA)OH] − and Fe(CN)6 3− /Fe(CN)6 4− redox couple. The alkaline stability of the membrane for 1440 h was evaluated in 5 N NaOH containing a 200 mM Fe(CN)6 3− /Fe(CN)6 4− redox couple. It was assessed according to the changes in the electrochemical and physicochemical properties. The performance of the membrane was evaluated over 40 charge–discharge cycles at a current density of 5 mA cm −2 current in a designed RFB cell. The obtained average coulombic efficiency (CE) was 92%, energy efficiency (EE) was 75%, voltage efficiency (VE) was 82% and volumetric efficiency was 34%. Under identical experimental conditions, the values of CE, EE, and VE for Nafion®-112 were 99%, 75%, and 76%, respectively. These results indicate the suitability of the polyethylene styrene–DVB based interpolymer cation exchange membrane for use in an alkaline RFB.