IIT Madras registers initial success with iron ion battery

  1. Researchers at Indian Institute of Technology(IIT) Madras have for the first time fabricated a rechargeable iron ion battery using mild steel as the anode.
  2. Currently,lithium-ion batteries are widely in use.However,the lithium reserves are limited when compared to iron reserves and hence the invention assume significance.
  3. Further,this invention comes at a time when the world is moving towards adopting electric vehicles which need cheaper batteries.
  4. The iron ion battery are also cost-effective and the amount of energy that can be stored in the battery is also high.
  5. Researchers have also demonstrated the performance of iron ions battery for 150 cycles of charging and discharging.It has displayed good stability with 54% capacity retention at the end of 50 cycles.
  6. In Iron ion battery,vanadium pentoxide is used as the cathode.Vanadium pentoxide was chosen as it has a layered structure with very large spacing between the layers.
  7. There are various benefits of iron over Lithium such as (a)Iron has favourable physico-chemical properties like lithium (b)The redox potential of iron ion is higher than lithium ion and (c)Iron is more stable during the charging process and therefore prevents short-circuiting of the batteries.