Novel Conjugated Ladder-Structured Oligomer Anode with High Lithium Storage and Long Cycling Capability

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• 作者：Jian Xie ; Xianhong Rui ; Peiyang Gu ; Jiansheng Wu ; Zhichuan J. Xu ; Qingyu Yan ; Qichun Zhang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：July 6, 2016
• 年：2016
• 卷：8
• 期：26
• 页码：16932-16938
• 全文大小：421K
• 年卷期：0
• ISSN：1944-8252

文摘

Herein we report the development of nanostructured poly(1,4-dihydro-11H-pyrazino[2′,3′:3,4]cyclopenta[1,2-b]quinoxalin-11-one) (PPCQ), a novel conjugated ladderlike oligomer with the presence of a rich amount of heteroatoms, as the anode material. Beyond its remarkable lithium storage of 972 mAh g^–1 after 120 cycles, the superior cycle life and stable capacity performance of 489 mAh g^–1 revealed by ultralong testing of 1000 cycles (with an average Coulombic efficiency 99.8%) at a high current density of 2.5 A g^–1 indicate its excellent electrochemical stability to be promisingly applied for high-performance lithium-ion batteries (LIBs).