Perylene based dilithium salt of N,N'-bis (glycinyl) perylene diimide (Li2-PDI) was synthesized and studied as an electrode material for lithium-ion batteries. The CH2 COOLi functionalization of perylene diimide is a simple strategy to mitigate the dissolution of the monomer in the electrolyte. The Li2-PDI electrode exhibits excellent capacity retention behaviour and delivers a stable specific capacity of 101mAhg−1 after 100 cycles at a current density of 17mAg−1, which is 98% of theoretical specific capacity. A remarkably stable capacity of 87mAhg−1 was observed even after 1000 cycles with 100% coulombic efficiency at a current density of 200mAg−1. The reversible electrochemical lithiation/delithiation mechanism of Li2-PDI was studied by ex-situ XRD and FT-IR spectroscopic techniques.