A set of parameters (and their concentration and temperature dependences) has been obtained for a lithium-ion battery composed of a MCMB anode, LiCoO2 cathode in 1M LiPF6 in a mixture of ethylene carbonate (EC), propylene carbonate (PC), ethyl-methyl carbonate (EMC) and di-ethyl carbonate (DEC) electrolyte. The parameter set was obtained by comparing the model simulations to the experimental discharge profiles obtained at various temperatures and rates. The concentration and temperature dependence of the extracted parameters were correlated through empirical expressions. These correlations can be used to predict the discharge process of a lithium-ion battery for different charge/discharge rates and temperatures.