Journal
ELECTROCHEMICAL AND SOLID STATE LETTERS
Volume 15, Issue 6, Pages A80-A82Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.033206esl
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Funding
- Strategy Task of Energy Source Technology Development Business of the Ministry of Knowledge Economy [2009T100200045]
- Korea Evaluation Institute of Industrial Technology (KEIT) [2009201010007A] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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An organic redox flow battery adopting tris(2,2'-bipyridine)nickel(II)tetrafluoroborate (Ni(Bpy)(3)(BF4)(2)) and tris(2,2'-bipyridine)iron(II)tetrafluoroborate (Fe(BPy)(3)(BF4)(2))) in propylenecarbonate electrolyte is investigated. With cyclic voltammetry, the redox current of one-electron related Fe(II)/Fe(III) and two-electron related Ni(II)/Ni(0) appears at 0.65 V and 1.66 V (vs. Ag/Ag+), respectively and their cycleabilities are highly stable during 100 cycles. Their charge-discharge characteristics on the carbon-felt electrodes are evaluated with 0.4 M Fe(Bpy)(3)(BF4)(2) and 0.2 M Ni(Bpy)(3)(BF4)(2) which are adopted as catholyte and anolyte. Comparing with the aqueous system, the higher cell voltage of 2.2 V was achieved and initial coulombic and energy efficiencies were reached with 90.4 and 81.8%. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.033206esl] All rights reserved.
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