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Issue 3, 2017
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A long cycle life, high coulombic efficiency iron molten air battery

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Despite the recent advancements in iron molten air batteries, great challenges still remain to realize cycling stability, high energy efficiency and a long-term cycling life. Herein, we demonstrate a new iron molten air battery for large-scale energy storage. We replace the KCl–LiCl–LiOH eutectic electrolyte used in our previous study with a Li0.87Na0.63K0.50CO3 eutectic electrolyte with added NaOH and LiOH. A fin air electrode configuration is designed to improve the coulombic efficiency. Cycling tests for the iron molten air battery showed a stable performance through 450 cycles with nearly 100% coulombic efficiency and an average discharge potential of ∼1.08 V when charged at a constant current of 0.05 A and discharged over a constant 100 Ω load to a 0.7 V cutoff at 500 °C. Moreover, the iron molten air battery had an excellent high-rate response up to 6.4C with a high coulombic efficiency of 95.1%. These results provide critical advances in developing iron molten air batteries with high efficiency and a long-term service life.

Graphical abstract: A long cycle life, high coulombic efficiency iron molten air battery

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Publication details

The article was received on 01 Dec 2016, accepted on 07 Mar 2017 and first published on 07 Mar 2017

Article type: Paper
DOI: 10.1039/C6SE00082G
Citation: Sustainable Energy Fuels, 2017,1, 474-481
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    A long cycle life, high coulombic efficiency iron molten air battery

    B. Cui, W. Xiang, S. Liu, H. Xin, X. Liu and S. Licht, Sustainable Energy Fuels, 2017, 1, 474
    DOI: 10.1039/C6SE00082G

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