Ultrathin conjugated microporous thermoset nanosheets for efficient Li-ion storage

Abstract

In this study, ultrathin conjugated microporous thermoset nanosheets are synthesized using a thermally initiated polymerization strategy and investigated as anode materials for Li-ion storage. The resulting nanosheets demonstrate a discharging capacity of ∼545.2 mA h g⁻¹ at 0.5 A g⁻¹ and maintain a reversible capacity of ∼329.3 mA h g⁻¹ at 3.0 A g⁻¹ over 1500 cycles. Electrochemical reaction mechanism studies indicate that the π-conjugated network structure, featuring nitrogen-decorated pores and edges, facilitates exceptionally stable and reversible electrochemical lithiation processes.