Synthesis of a 2D nitrogen-rich π-conjugated microporous polymer for high performance lithium-ion batteries

Abstract

Novel 2D graphene analogues with high conductivity are highly demanded as anode materials for lithium-ion batteries (LIBs). Here we report the preparation and characterization of a π-conjugated microporous polymer NGA-CMP with an experimental bandgap of 2.34 eV. Heated sample NGA-CMP400 is used for the first time as an anode material for LIBs. NGA-CMP400 achieves a high reversible capacity of 701 mA h g⁻¹ at 1 A g⁻¹ with extremely stable cycling performance over 500 cycles. The rational design of this kind of graphene-like 2D material with inherent porosity and enhanced electronic conductivity possesses important significance in carbon-based anode materials for LIBs.