Hits:

Indexed by:期刊论文

Date of Publication:2019-04-14

Journal:NANOSCALE

Included Journals:PubMed、SCIE、EI

Volume:11

Issue:14

Page Number:6610-6619

ISSN No.:2040-3364

Key Words: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

Abstract: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.