Journal of Power Sources, Vol.196, No.22, 9830-9834, 2011
In situ lithiation of TiS2 enabled by spontaneous decomposition of Li3N
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-TiS2-80Li(2)S:20P(2)S(5) 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 287 mAh g(-1), 20% greater than the theoretical capacity of TiS2 at 239 mAh g(-1). The difference provides an excess capacity in the indium metal negative electrode. (C) 2011 Elsevier B.V. All rights reserved.