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论文类型：期刊论文

发表时间：2019-04-14

发表刊物：NANOSCALE

收录刊物：EI、SCIE、PubMed

卷号：11

期号：14

页面范围：6610-6619

ISSN号：2040-3364

关键字：Aromatic hydrocarbons; Aromatization; Carbon; Density functional theory; Electrolytes; Energy storage; Molecules; Potassium hydroxide; Supercapacitor; Synthesis (chemical), Aromatic molecules; Cycling stability; Formation mechanism; High conductivity; Hydrocarbon molecules; Materials Studio; Rate performance; Transfer capability, Charge transfer

摘要：It is a big challenge to synthesize ultrathin carbon nanonets with an enhanced charge transfer capability for high-performance energy storage devices. Herein, ultrathin carbon nanonets (UCNs) were successfully synthesized for the first time from fluorene, a typical aromatic molecule, by a template strategy for supercapacitors. The formation mechanism of UCNs was determined using Density Functional Theory and Materials Studio, in which the fluorene-derived radicals were assembled into UCNs in the template-confinement space with the assistance of KOH. The as-made UCNs feature interconnected high-conductivity net-like architectures with enhanced charge transfer capability, evidenced by their high capacitance, excellent rate performance and cycling stability for symmetrical supercapacitors in a KOH electrolyte. This finding may provide a significant step forward in understanding the formation mechanism of graphene-like materials from more complicated aromatic hydrocarbon molecules, and our work may draw wide attention in the fields of aromatic chemistry and carbon-based energy storage materials.