Pushing up lithium storage through nanostructured polyazaacene analogues as anode

• Main Authors: Wu, Jiansheng, Rui, Xianhong, Long, Guankui, Chen, Wangqiao, Yan, Qingyu, Zhang, Qichun
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2015
• Subjects: DRNTU::Engineering::Materials::Energy materials
• Online Access: https://hdl.handle.net/10356/100251; http://hdl.handle.net/10220/25727
• Institution: Nanyang Technological University

According to the evidence from both theoretical calculations and experimental findings, conjugated ladder polymers containing large π-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 mAh g−1, 0.05C), good rate performance (303 mAh g−1, 5C), and excellent cycle life (1000 cycles), especially at high temperature of 50 °C. Our results suggest nanostructured conjugated ladder polymers could be alternative electrode materials for the practical application of LIBs.