Investigation of the properties influencing the deactivation of iron electrodes in iron-air batteries

Villanueva-Martínez, Nicolás I.; Alegre, Cinthia; Rubín, Javier; McKerracher, R. D.; León, Carlos Ponce de; Rodríguez, Horacio Antonio Figueredo; Lázaro, M.J.

doi:10.1016/j.electacta.2023.142964

Cited by 4 publications

(1 citation statement)

References 53 publications

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“…At the beginning of the constant current discharge, the battery voltage starts at around 1.4 V per cell and decreases gradually throughout the discharge. As the Fe-Ni battery approaches the end of available capacity, the voltage starts to drop rapidly, so the cutoff discharge voltage is set at 1.0 V to avoid any adverse reactions, such as the formation of the less reversible iron oxyhydroxide (FeOOH) phase at lower discharge voltages [ 45 , 46 ]. The charge and discharge cycles are repeated for 10 cycles to validate their stable performances.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Fe-Ni Battery/Module for Grid Service Duty Cycles

Shamim,

Thomsen,

Crawford

et al. 2024

Materials

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Iron–nickel (Fe-Ni) batteries are renowned for their durability and resilience against overcharging and operating temperatures. However, they encounter challenges in achieving widespread adoption for energy storage applications due to their low efficiency and the need for regular maintenance and electrolyte replacement, which adds to maintenance costs. This study evaluates and demonstrates the capabilities of Fe-Ni batteries for participating in grid energy storage applications. Stable performance was observed frequency regulation (FR) testing at 100% and 50% state of charge (SOC)s, while at 50% SOC, there was a 14% increase in efficiency compared to 100% SOC. Although 25% SOC achieved higher efficiency, limited cyclability was observed due to reaching the discharge cutoff voltage. Optimal SOC selection, battery monitoring, maintenance, and appropriate charging strategies of Fe-Ni batteries seem to be crucial for their FR applications. Fe-Ni batteries exhibit stable peak shaving (PS) results, indicating their suitability and reliability under various load conditions for PS testing. Extended cycling tests confirm their potential for long-term grid-scale energy storage, enhancing their appeal for PS and FR applications.

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Section: Resultsmentioning

confidence: 99%