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Low temperature, high energy density non-aqueous Redox Flow Battery

 
: Herr, T.; Fischer, P.; Tübke, J.; Pinkwart, K.; Elsner, P.

:

Manivanna, A. ; Electrochemical Society -ECS-:
ECS and SMEQ Joint International Meeting 2014 : Symposium on Batteries and Energy Technology Joint General Session, October 5, 2014 - October 9, 2014, Cancun, Mexico
Pennington, NJ: ECS, 2015 (ECS transactions 64.2015, Nr.18)
ISBN: 978-1-60768-539-5
S.41-50
Electrochemical Society (Meeting) <226, 2014, Cancun>
Sociedad Mexicana de Electroquimica (Congreso) <29, 2014, Cancun>
Symposium on Batteries and Energy Technology Joint General Session <2014, Cancun>
Englisch
Konferenzbeitrag
Fraunhofer ICT ()

Abstract
A non-aqueous vanadium acetylacetonat redox flow battery in a solvent mixture consisting of acetonitrile, 1,3-dioxolane and dimethyl sulfoxide was investigated at two different temperatures. It was shown, that the reversibility of the both redox processes of V(acac)3 almost did not changed even at 248.15 K compared to the room temperature. But due to low temperature, increase of viscosity led to an increased electrolyte resistance and low rate constant. On the other hand experiments in a charge-discharge test cell achieved energy and coulombic efficiencies that are similar to the room temperature values.

: http://publica.fraunhofer.de/dokumente/N-352547.html