Experimentally measured stresses are used to assess the corresponding variations in the Li solubility in Si electrodes. While the observed stresses can alter the electrochemical potential by 50 mV or more, this has only a modest impact on the expected Li content. The magnitude of this effect is limited by the relatively large free energy of mixing for Li in Si. (C) 2011 The Electrochemical Society. [DOI: 10.1149/2.016201esl] All rights reserved.