Isophthalic acid functionalized peryleneimide anode material for lithium ion batteries

• An isophthalic acid-functionalized peryleneimide (PI-COOH) anode material for lithium-ion batteries was synthesized. • The PI-COOH electrodes exhibit good long-cycle stability and rate capability. • The capacity storage mechanisms of PI-COOH electrode are discussed. Peryleneimide and its derivatives have excellent thermal and chemical stability and have been extensively studied as cathode materials for lithium-ion batteries. In this paper, an isophthalic acid-functionalized peryleneimide (PI-COOH) anode active material is provided, the capacity storage mechanisms of PI-COOH electrodes are explored, and the cycling performance and rate capability of PI-COOH/Li batteries are investigated. In the total capacity storage of the PI-COOH electrode, the diffusion process provides about 69%. The PI-COOH electrode exhibits good cycling stability and rate capability, with a specific capacity of 580 mAh g -1 after 100 cycles at a current density of 50 mA g -1 and a specific capacity of 286.6 mAh g -1 after 1000 cycles at a current density of 1000 mA g -1 . The results suggest that PI-COOH is a potential anode material for Li-ion batteries.