J. Mun, Myung-Jin Lee, Joung-Won Park, Dukjin Oh, Doo-yeon Lee, S. Doo
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引用次数: 112
摘要
研究了在碳酸丙酯电解质中采用三(2,2′-联吡啶)镍(II)四氟硼酸盐(Ni(Bpy)3(BF4)2)和三(2,2′-联吡啶)铁(II)四氟硼酸盐(Fe(Bpy)3(BF4)2))的有机氧化还原液流电池。通过循环伏安法，单电子相关的Fe(II)/Fe(III)和双电子相关的Ni(II)/Ni(0)的氧化还原电流分别为0.65 V和- 1.66 V(相对于Ag/Ag+)，它们的循环能力在100次循环中高度稳定。分别以0.4 M Fe(Bpy)3(BF4)2和0.2 M Ni(Bpy)3(BF4)2作为阴极电解质和阳极电解质，对其在碳毡电极上的充放电特性进行了评价。与水体系相比，电池电压为2.2 V，库仑效率和能量效率分别为90.4和81.8%。
Non-Aqueous Redox Flow Batteries with Nickel and Iron Tris(2,2′-bipyridine) Complex Electrolyte
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%.
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