Sensors and Electron Devices Directorate Research Areas

High Energy Batteries

Advisor: Behl, Wishvender K. (Wishvender.behl@us.army.mil 301-394-0341)
Keywords: Electrode materials; Electrolytes; Lithium-ion batteries; Lithium polymer batteries

Research in the area of lithium and lithium-ion batteries is being pursued to fulfill Army’s need for a safe, reliable high-energy density power source for individual soldier communications and future combat systems. The commercial lithium-ion batteries are comprised of a lithium-graphite anode, a solution of lithium hexafluorophosphate in an organic solvent as the electrolyte and lithium cobalt oxide as the cathode. This research focuses on improving the energy density, rate capability, and low-temperature performance of lithium and lithium-ion cells. To achieve these goals, we are investigating alternate electrode materials such as lithium metal alloys, lithium titanium oxide as anodes, lithium nickel cobalt oxide and lithium manganese nickel oxide as cathodes, and new highly conducting electrolytes capable of operation at wider temperature range. Electroanalytical techniques such as cyclic voltammetry, controlled potential coulometry, impedance spectroscopy, conductivity measurements, x ray, and scanning electron microscopy are routinely employed to characterize the new materials and study their electrochemical stability. In addition, research is also being conducted on primary lithium and rechargeable lithium polymer batteries.

References
Behl WK, e t al: Journal of the Indian Chemical Society 82: 1119, 2005
Read JA, Behl WK: Electrochemical and Solid State Letters 12: A16, 2009