Integration of Fullerenes as Electron Acceptors in 3D Graphene Networks [electronic resource] : Enhanced Charge Transfer and Stability through Molecular Design

• Ngôn ngữ: eng
• Ký hiệu phân loại: 546 Inorganic chemistry
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. National Nuclear Security Administration ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2019
• Mô tả vật lý: Size: p. 28818-28822 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 261858
• Chủ đề: 1. [60]fullerene; 2. 25 energy storage; 3. 36 materials science; 4. 3d graphene network; 5. 77 nanoscience and nanotechnology; 6. Capacity; 7. Charge transfer; 8. Electrochemical stability

Tóm tắt

 Here, we report a concept that allows the integration of the characteristic properties of [60]fullerene in 3D graphene networks. In these systems, graphene provides high electrical conductivity and surface area while fullerenes add high electron affinity. We use molecular design to optimize the interaction between 3D graphene networks and fullerenes, specifically in the context of stability and charge transfer in an electrochemical environment. We demonstrated that the capacity of the 3D graphene network is critcally improved upon the addition of C<
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 60<
 /sub>
  and C<
 sub>
 60<
 /sub>
  monoadducts by providing additional acceptor states in the form of low-lying lowest unoccupied molecular orbitals of C<
 sub>
 60<
 /sub>
  and its derivative. Guided by experimental results and first-principles calculations, we synthesized and tested a C<
 sub>
 60<
 /sub>
  monoadduct with increased stability by strengthening the 3D graphene?C<
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 60<
 /sub>
  van-der-Waals interactions. The synthesis approach and stabilization strategy presented here is expected to benefit the integration of graphene?C<
 sub>
 60<
 /sub>
  hybrid materials in solar cell and charge storage applications.