Electrochemical Hybrid Storage Systems
Dr Steve Lipka
CAER, University of Kentucky
Thursday, November 17, 2004, 3:00pm
Ben Bandy Conference Center
Center for Applied Energy Research
Secondary batteries and electrochemical capacitors are complementary energy storage technologies that have typically satisfied applications requiring either high energy or power density, respectively. Often these technologies can be coupled together at the cell level to provide an electrochemical storage device that can be used to meet an application's demand for both power and energy performance. Recent developments over the past 5 or so years have gravitated toward developing so-called hybrid or asymmetric cells that couple a battery-type electrode with an electrochemical-type electrode. With the proper selection and design of electrode materials, these hybrid devices can offer energy, power and cycle performance not obtained previously with batteries and electrochemical capacitors alone. This presentation will provide a comparative analysis of battery and electrochemical capacitors, the basic operating principals of selected hybrid systems and examples of current and possibly future hybrid technologies.