The present invention relates to an anodic material for use in lithium ion battery (LIB) comprising of FeSe 2 and its carbon composite with N, S doped porous carbon spheres (PNSCS) which can be synthesised by hydrothermal route using iron ammonium sulphate, selenium powder and citric acid as precursors and used as an anode for LIB. Further, the invention provides a process for synthesizing the said FeSe2@PNSCS micro-flower composite by simple hydrothermal route.