Development of Low Temperature Ultracapacitor

The objective of this Phase 1 effort is to develop an asymmetric supercapacitor (ASC) that provides>10 Wh/kg energy density and a high power density, and maintains this performance down to -55 degrees C. Yardney Technical Products (YTP), a recognized specialty high energy battery manufacturer in Pawcatuck, CT in collaboration with the Jet Propulsion Laboratory (JPL) proposes to design, develop and demonstrate an ASC meeting the above performance metrics. This ASC will ultimately be integrated with a low temperature lithium ion battery (LIB) as part of a hybrid power system for Army applications. During Phase I of this effort, low temperature electrolytes previously developed by JPL for use in symmetric supercapacitors (SC) and capable of operating down to -75 degrees C will be further developed and adapted for use in an asymmetric format featuring a high-energy nanostructured lithium titanate electrode. Suitability of other ASC systems such as lithium manganese oxide will be investigated and the best system will be selected for further studies.