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Electrochemical thermodynamic measurement system

United States Patent

September 29, 2009
View the Complete Patent at the US Patent & Trademark Office
The present invention provides systems and methods for accurately characterizing thermodynamic and materials properties of electrodes and electrochemical energy storage and conversion systems. Systems and methods of the present invention are configured for simultaneously collecting a suite of measurements characterizing a plurality of interconnected electrochemical and thermodynamic parameters relating to the electrode reaction state of advancement, voltage and temperature. Enhanced sensitivity provided by the present methods and systems combined with measurement conditions that reflect thermodynamically stabilized electrode conditions allow very accurate measurement of thermodynamic parameters, including state functions such as the Gibbs free energy, enthalpy and entropy of electrode/electrochemical cell reactions, that enable prediction of important performance attributes of electrode materials and electrochemical systems, such as the energy, power density, current rate and the cycle life of an electrochemical cell.
Reynier; Yvan (Meylan, FR), Yazami; Rachid (Los Angeles, CA), Fultz; Brent T. (Pasadena, CA)
California Institute of Technology (Pasadena, CA), Cantre National de le Recherche Scientifique (Paris, FR)
11/ 462,290
August 3, 2006
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with United States governmental support awarded by the following agencies: Department of Energy DE-FG03-00ER15035 and DE-FG02-03ER15425. The United States has certain rights in this invention.