Pushing Up Lithium Storage through Nanostructured Polyazaacene Analogues as Anode

According to the evidence from both theoretical calculations and experimental findings, conjugated ladder polymers containing large pi-conjugated structure, a high number of nitrogen heteroatoms, and a multiring aromatic system, could be an ideal organic anode candidate for lithium-ion batteries (LIBs). In this report, we demonstrated that the nanostructured polyazaacene analogue poly(1,6-dihydropyrazino[2,3g]quinoxaline-2,3,8-triyl-7-(2H)-ylidene-7,8-dimethylidene) (PQL) shows high performance as anode materials in LIBs: high capacity (1750 mAhg(-1), 0.05C), good rate performance (303 mAhg(-1), 5C), and excellent cycle life (1000 cycles), especially at high temperature of 50 degrees C. Our results suggest nanostructured conjugated ladder polymers could be alternative electrode materials for the practical application of LIBs.