In Situ Growth of Novel Graphene Nanostructures in Reduced Graphene Oxide Microspherical Assembly with Restacking-Resistance and Inter-Particle Contacts for Energy Storage Devices

Young Hwan Kim, Geon Woo Lee, Yeon Jun Choi, Kwang Bum Kim

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Graphene is extensively investigated for various energy storage systems. However, the very low density (<0.01 g cm−3) of graphene nanosheets has hindered its further applications. To solve this issue, a controlled assembly of 2D graphene building blocks should be developed into graphene microspheres with high packing density, and restacking of graphene should be prevented to ensure an electrochemically accessible surface area during the assembly. Furthermore, graphene microspheres should have multiple 1D external conductive architecture to promote contacts with the neighbors. This study reports in situ growth of novel graphene nanostructures in reduced graphene oxide microspherical assembly (denoted as GT/GnS@rGB) with restacking resistance and interparticle contacts, for electrochemical energy storage. The GT/GnS@rGB showed high gravimetric (231.8 F g−1) and volumetric (181.5 F cm−3) capacitances at 0.2 A g−1 in organic electrolyte with excellent rate capabilities of 94.3% (@ 0.2 vs 10 Ag−1). Furthermore, GT/GnS@rGB exhibited excellent cycling stability (96.1% of the initial capacitance after 100 000 charge/discharge cycles at 2 A g−1). As demonstrated in the electrochemical evaluation as electrode materials for electrical double-layer capacitors, unique structural and textural features of the GT/GnS@rGB would be beneficial in the use of graphene assembly for energy storage applications.

Original languageEnglish
Article number2101930
JournalSmall
Volume17
Issue number32
DOIs
Publication statusPublished - 2021 Aug 12

Bibliographical note

Publisher Copyright:
© 2021 Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • General Chemistry
  • Biomaterials
  • General Materials Science

Fingerprint

Dive into the research topics of 'In Situ Growth of Novel Graphene Nanostructures in Reduced Graphene Oxide Microspherical Assembly with Restacking-Resistance and Inter-Particle Contacts for Energy Storage Devices'. Together they form a unique fingerprint.

Cite this