TY - JOUR
T1 - Communication—A new additive for increased stabilization of catholytes in vanadium flow batteries (VFBs)
AU - Oboroceanu, Daniela
AU - Quill, Nathan
AU - Lenihan, Catherine
AU - Lynch, Robert P.
AU - Buckley, D. Noel
N1 - Publisher Copyright:
© The Author(s) 2019.
PY - 2019
Y1 - 2019
N2 - We report a new additive, monobasic potassium arsenate (KH2AsO4), for improving the thermal stability of VFB catholytes. Using our standard accelerated testing methodology at 30–70°C, we showed that the effect increases continuously with increasing concentration of arsenate over the range investigated (0 – 0.10 mol dm−3). In comparison to similar experiments with phosphate (H3PO4), the magnitude of the effect was greater for arsenate. A combination of arsenate and phosphate was also effective. Based on these results, we speculate that other Group-V elements in the +5 oxidation state may also stabilize VFB catholytes.
AB - We report a new additive, monobasic potassium arsenate (KH2AsO4), for improving the thermal stability of VFB catholytes. Using our standard accelerated testing methodology at 30–70°C, we showed that the effect increases continuously with increasing concentration of arsenate over the range investigated (0 – 0.10 mol dm−3). In comparison to similar experiments with phosphate (H3PO4), the magnitude of the effect was greater for arsenate. A combination of arsenate and phosphate was also effective. Based on these results, we speculate that other Group-V elements in the +5 oxidation state may also stabilize VFB catholytes.
UR - http://www.scopus.com/inward/record.url?scp=85073198579&partnerID=8YFLogxK
U2 - 10.1149/2.1481910jes
DO - 10.1149/2.1481910jes
M3 - Article
AN - SCOPUS:85073198579
SN - 0013-4651
VL - 166
SP - A2270-A2272
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 10
ER -