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Title: Scalable fabrication of micron-scale graphene nanomeshes for high-performance supercapacitor applications

Graphene nanomeshes (GNMs) with nanoscale periodic or quasi-periodic nanoholes have attracted considerable interest because of unique features such as their open energy band gap, enlarged specific surface area, and high optical transmittance. These features are useful for applications in semiconducting devices, photocatalysis, sensors, and energy-related systems. We report on the facile and scalable preparation of multifunctional micron-scale GNMs with high-density of nanoperforations by catalytic carbon gasification. The catalytic carbon gasification process induces selective decomposition on the graphene adjacent to the metal catalyst, thus forming nanoperforations. Furthermore, the pore size, pore density distribution, and neck size of the GNMs can be controlled by adjusting the size and fraction of the metal oxide on graphene. The fabricated GNM electrodes exhibit superior electrochemical properties for supercapacitor (ultracapacitor) applications, including exceptionally high capacitance (253 F g-1 at 1 A g-1) and high rate capability (212 F g-1 at 100 A g-1) with excellent cycle stability (91% of the initial capacitance after 50 000 charge/discharge cycles). Moreover, the edge-enriched structure of GNMs plays an important role in achieving edge-selected and high-level nitrogen doping.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [4] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [8] ;  [2] ;  [9] ;  [3]
  1. Yonsei Univ., Seodaemoon-gu (Republic of Korea). Dept. of Materials Science and Engineering; Univ. of Cambridge (United Kingdom). Dept. of Materials Science and Metallurgy
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Dept.
  3. Yonsei Univ., Seodaemoon-gu (Republic of Korea). Dept. of Materials Science and Engineering
  4. Yonsei Univ., Seodaemoon-gu (Republic of Korea). School of Mechanical Engineering
  5. Korea Electrotechnology Research Inst., Changwon (Republic of Korea). nano Carbon Materials Research Group
  6. Dongguk Univ., Seoul (Korea, Republic of). Dept. of Energy and Materials Engineering
  7. Korea Inst. of Science and Technology, Seongbuk-gu (Republic of Korea). Center for Energy Convergence Research
  8. Canadian Light Sources, Inc., Saskatoon, SK (Canada)
  9. Korea Inst. of Ceramic Engineering and Technology, Jinju (Republic of Korea). Energy and Environmental Division
Publication Date:
OSTI Identifier:
1335394
Report Number(s):
BNL-111823-2016-JA
Journal ID: ISSN 1754-5692; EESNBY; VT1201000
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Energy & Environmental Science
Additional Journal Information:
Journal Volume: 9; Journal Issue: 4; Journal ID: ISSN 1754-5692
Publisher:
Royal Society of Chemistry
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 77 NANOSCIENCE AND NANOTECHNOLOGY