Potassium perylene-tetracarboxylate with two-electron redox behaviors as a highly stable organic anode for K-ion batteries

Abstract

Potassium perylene-3,4,9,10-tetracarboxylate was exploited as a new organic anode for potassium-ion batteries, exhibiting two-electron redox behavior and a theoretical capacity of 93 mA h g⁻¹. After optimization, the K₄PTC electrode showed an average of 50 mA h g⁻¹ over 2500 cycles at a current density of 0.5 A g⁻¹.