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Super-Iron Nanoparticle based battery

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Stable Super-iron battery made with nano-range iron particles  showing coulombic efficiency upto 80%Storage battery with a cathode comprising nanometer sized super-iron particles
Stuart Licht
Managed By
Jerry Comanescu
Licensing Associate (202) 994-8975
Patent Protection

Method for forming battery active super-iron nanoparticles and storage battery containing the same

PCT Patent Application PCT/US2011/042740

US Patent Pending
A novel high capacity, environmental benign energy storage system: Super-iron boride battery
Journal of Power Sources, April 15, 2008, p. 407
The super-iron boride battery
Journal of Electrochemical Scoiety, February 20, 2008,p. A297
Stabilized alkaline Fe(VI) charge transfer
Journal of Electrochemical Society, October 29, 2007, p.A1
Zirconia coating stabilized super-iron alkaline cathodes
Journal of Power Sources, November 15, 2007, p. 1012
A high capacity Li-ion cathode:The Fe(III/VI) super-iron cathode
Energies, May 6, 2010, p. 960

Higher capacity electrochemical storage materials are needed to increase the energy storage capacity of batteries to improve devices ranging from portable consumer electronics, and lightweight medical to military devices. Improved battery technologies are based on abundant materials, which are environmentally benign and store substantially greater energy than conventional batteries. This invention relates to a super-iron particle based battery.

Most iron materials and salts exist with iron in the +2 valence state (ferrous salts), +3  valence states (ferric salt) or as iron metal. Super-iron materials are a unique class of iron salts that exist in +6 valence state. A wide variety of super-iron batteries have been explored including Li-ion super-iron batteries and alkaline super-iron batteries. Charge storage gas been accomplished via alkali super-iron salts, such as Li2FeO4, Na2FeO4,K2FeO4,Ru2FeO4,Cs2FeO4, and moxtures or alloys of those salts, alkali earth super-iron salts, such as BaFeO4 and SrFeO4, and also via a transition metal super-iron salt, Ag2FeO4.

Dr. Stuart Licht, of the George Washington University, earlier developed a battery that uses a stable superiron material in a highly unusual state. Electrochemical modification increases super-iron discharge currents to levels compatible with the best conventional battery systems. Super-iron has tremendous storage capacity, increasing the novel battery life from hours to years. However, the decrease in particle size, which increases the ratio of surface area to volume and promotes electrochemical charge transfer, also exposes the particle to a greater risk of decomposition through higher chemical reactivity. Super-iron salts are notoriously fragile, readily reduced to the ferric state with both heat and contact with water and making them unlikely candidates for use in smaller, or perhaps more reactive, nano-size. Dr. Licht has now made improvements to the super-iron battery by reducing iron particle size to nano-range while improving the battery performance to a coulombic efficiency of as high as 80% as illustrated. This invention is the first to find a method to form battery active superiron nanoparticles, which greatly enhance the battery power density.

Stage of Development

  • Battery has been tested and evaluated at the laboratory scale


  • Automotive or car batteries with improved charge storage and discharge potential
  • Wherever electrical is used or can be used


  • A higher capacity, higher power, than currently available batteries
  • Environmentally benign materials
  • Expected to help improve devices ranging from portable consumer electronics, and lightweight medical to military devices