We report on a novel method for in situ lithiation of lithium free TiS2 using Li3N in an all-solid-state battery configuration. This method was tested using a Li3N–TiS2–80Li2S:20P2S5 composite positive electrode and an indium metal negative electrode. It is shown that approximately 37% of Li3N spontaneously decomposes during composite preparation regardless of the composition. Solid-state battery cells built with a 3:1 stoichiometric ratio of Li:Ti demonstrated a high 1st cycle charge capacity of 287mAhg−1, 20% greater than the theoretical capacity of TiS2 at 239mAhg−1. The difference provides an excess capacity in the indium metal negative electrode.