LiFePO4 electrodes, composed of 5% PVDF and 5% carbon, were coated on aluminum foil. The LiFePO4 electrodes were calendered to 2.5 g cm(-3). A comparison of the electrochemical performance of uncalendered and calendered LiFePO4 electrodes was made. Electrochemical impedance spectroscopy analysis of LiFePO4 symmetric cells and analysis of four-point probe resistance measurements showed that calendering of the electrodes resulted in a large decrease in contact resistance at the current collector - electrode interface. Rate capability data of Li/LiFePO4 coin cells showed that calendered electrodes maintained their capacity better than uncalendered electrodes at high rates. The contact resistance, made up of constriction resistance and film resistance, was analyzed with contact theory for plastic deformation. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.029211jes] All rights reserved.