An aqueous alkaline battery consisting of inexpensive all-iron redox chemistries for large-scale energy storage

L. Wei, M.C. Wu, T.S. Zhao, Y.K. Zeng and Y.X. Ren

Applied Energy, 2018, vol. 215, issue C, 98-105

Abstract: In this work, an iron-based alkaline battery using the same redox-active element featuring different coordination chemistries is developed and tested. The battery achieves a significantly low active material cost per kilowatt hour ($22 kW h−1) due to the inherently inexpensive price and availability of iron oxide and iron ferricyanide, particularly when compared with state-of-the-art vanadium redox flow batteries ($118 kW h−1) or the commercialized nickel cadmium battery ($51 kW h−1). Experimental results show that the present battery creates an equilibrium cell potential of 1.2 V and its coulombic efficiency reaches as high as 99% at a current density higher than 4 mA cm−2. Moreover, the energy efficiency can be maintained above 76% and the capacity decay rate is only 0.15% per cycle at a current density of 2 mA cm−2 over 150 cycles. With these advantages, the battery offers a promising solution for low-cost energy storage applications.

Keywords: All iron battery; Alkaline battery; Low cost; Energy storage (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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DOI: 10.1016/j.apenergy.2018.01.080

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