Indian researchers recently announced the development of a rechargeable iron ion battery, which uses low carbon steel as the anode, which has the advantages of high cost performance and high storage capacity.
Related research results were recently published in the "Chemical Newsletter" of the Royal Society of Chemistry. The paper said that the iron-ion battery developed by the research team of the Indian Institute of Technology Madras Branch uses low-carbon steel as the anode, vanadium pentoxide as the cathode, and the electrolyte is an ether-based electrolyte containing iron perchlorate.
Studies have shown that this battery can be charged and discharged 150 times, and can maintain 54% of the electricity at the end of 50 cycles, showing good stability. When manufacturing such batteries under specific conditions, their energy density can reach 220 watt-hours per kilogram, which is about 60% of lithium-ion batteries. The energy density of this battery manufactured in the general environment is close to 40% of the lithium ion battery.
The researchers said that if pure iron is used as the anode, iron ions will not easily move from the anode to the cathode and return to the anode when charging, but the small amount of carbon present in the low-carbon steel promotes this cycle. They believe that iron-ion batteries are more stable during charging, can prevent battery short circuits, and have lower costs compared to commonly used lithium-ion batteries.
The team's next focus is to try different cathode materials to further improve the performance of iron-ion batteries.
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