Novel Cu2S-MoO3 nanocomposite (NC) has been synthesized successfully by single step hydrothermal method. The crystal structure, morphology and optical properties of Cu2S-MoO3 NC were individualised by XRD, FTIR, SEM, TEM, UV-Visible spectroscopy. As synthesized Cu2S-MoO3 NC was used as anode material for lithium ion battery (LIB) and manifested first discharge capacity 1516 mAhg(-1) at C/4 current rate. Cu2S-MoO3 NC is also implemented for photocatalytic hydrogen generation. In addition to above applications, it is materialized for degradation of organic dye (methylene blue) and chromium reduction [Cr(VI) to Cr(III)] with peerless activity. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.