1. www.covalentassociates.com SBIR Grant No. DE-FG02-06ER84598 K. K. Tikhonov, W.A. Cataldo and V. R. Koch (P.I.) Covalent Associates, Inc. 10 State Street Woburn, MA 01801 Thermally Robust Capacitors for the Drilling Industry

2. www.covalentassociates.com Drilling Industry Market for Down Hole Power Sources Li/SOCl 2 battery sales >$200M/year A Li/SOCl 2 :EDLC hybrid power source that provides pulse power from the EDLC would capture half of the market At present, 95% of this market requires power sources that operate between 100ºC and 150ºC; 5% requires performance between 150ºC and 225ºC

3. www.covalentassociates.com Phase I Objectives Synthesize, purify and electrochemically characterize a number of new IL electrolyte materials Evaluate the new electrolytes in EDLC coin cells and in wound AA-size cells (Redox Engineering) at temps ranging from 150ºC to 225ºC

4. Electrolyte Specific Conductance www.covalentassociates.com

5. EDLC Hardware www.covalentassociates.com Redox Engineering Bonita Springs, FL

6. Coin Cells: 150 o C at 1.75V IL 1, 10 mA/cm 2 IL 2, 10 mA/cm 2 www.covalentassociates.com

7. Self-discharge at 150 o C www.covalentassociates.com

8. Unoptimized Wound AA Cell Performance at 150 o C IL 2 www.covalentassociates.com

9. IL3 Cyclability to 2V at 225 o C www.covalentassociates.com

10. Ragone Plot www.covalentassociates.com EDLC current pulses: 10 to 250 mA/cm 2 at 150ºC with IL2

11. Summary The new ionic liquid electrolytes have been shown to be thermo- chemically and electrochemically compatible with commercially available electrodes and cell packaging at elevated temperatures. EDLC cycle life (>10 3 cycles) and calendar life (>10 3 hr) are more than adequate for down hole applications. Safe and reliable high temp EDLCs can be manufactured and sold for less than either bobbin or wound Li/SOCl 2 batteries. Phase I objectives have been met; Phase II will advance high temp EDLC technology by testing hermetically sealed wound capacitors down hole in a pulser tool. www.covalentassociates.com