Solution-processed nitrogen-rich graphene-like holey conjugated polymer for efficient lithium ion storage
2017; Elsevier BV; Volume: 41; Linguagem: Inglês
10.1016/j.nanoen.2017.08.038
ISSN2211-3282
AutoresZong‐Qiong Lin, Jian Xie, Bowei Zhang, Jiewei Li, Jiena Weng, Rong‐Bin Song, Xiao Huang, Hao Zhang, Hai Li, Ye Liu, Zhichuan J. Xu, Wei Huang, Qichun Zhang,
Tópico(s)Graphene research and applications
ResumoPreparing well-defined single-layer two-dimensional (2D) holey conjugated polymers (HCP) is very challenging. Here, we report a bottom-up method to produce free-standing single-layer nitrogen-rich graphene-like holey conjugated polymers (NG-HCP) nanosheets through solution-process. The as-prepared 2D NG-HCP sheet possesses a thickness of 1.0 ± 0.2 nm and consists of graphene-like subunits as well as homogeneous hexagonal micropores (ca. 11.65 Å). The synergistic effect of high porosity, heteroatomic doping and good dispersity of NG-HCP nanosheets make them suitable as excellent anode materials for Li-ion batteries (LIBs), leading to an extremely high reversible capacity of 1320 mAh g−1 (at 20 mA g−1), a good rate performance, and an excellent cycle life with an approximate 100% Coulombic efficiency for more than 600 cycles. Our findings would open new opportunities to develop state-of-the-art free-standing 2D-HCP materials for low-cost and high performance energy storage as well as optoelectronic devices.
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