Journal
JOURNAL OF POWER SOURCES
Volume 283, Issue -, Pages 300-304Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.02.083
Keywords
Redox-flow battery; Single redox couple; Metal complexes; Energy storage system; Non-aqueous electrolytes
Funding
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20132020000340]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20132020000340] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Nickel(II)-1,4,8,11-tetraazacyclotetradecane is examined as a possible single redox couple for nonaqueous flow batteries. The nickel complex cation is reduced at -1.81 V (vs. Fc/Fc(+)) and oxidized at 0.74 V, showing that this tetradentate Ni(II) complex cation can be used as a single redox couple that offers a cell voltage of 2.55 V. The maximum solubility is 0.4 M in 1.0 M tetraethylammonium tetrafluoroborate dissolved in a mixed solvent of ethylene carbonate and propylene carbonate. When tested in a non-flowing cell, this single redox couple exhibits a very stable cycle performance. (C) 2015 Elsevier B.V. All rights reserved.
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