Disassembly–Reassembly Approach to RuO2/Graphene Composites for Ultrahigh Volumetric Capacitance Supercapacitor

Hongyun Ma, Debin Kong, Yue Xu, Xiaoying Xie, Ying Tao, Zhichang Xiao, Wei Lv, Hee Dong Jang, Jiaxing Huang*, Quan Hong Yang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Scopus citations

Abstract

A porous, yet compact, RuO2/graphene hybrid is successfully prepared by using a disassembly–reassembly strategy, achieving effective and uniform loading of RuO2 nanoparticles inside compact graphene monolith. The disassembly process ensures the uniform loading of RuO2 nanoparticles into graphene monolith, while the reassembly process guarantees a high density yet simultaneously unimpeded ion transport channel in the composite. The resulting RuO2/graphene hybrid possesses a density of 2.63 g cm−3, leading to a record high volumetric capacitance of 1485 F cm−3 at the current density of 0.1 A g−1. When the current density is increased to 20 A g−1, it remains a high volumetric capacitance of 1188 F cm−3. More importantly, when the single electrode mass loading is increased to 12 mg cm−2, it still delivers a high volumetric capacitance of 1415 F cm−3 at the current density of 0.1 A g−1, demonstrating the promise of this disassembly–reassembly approach to create high volumetric performance materials for energy storage applications.

Original languageEnglish (US)
Article number1701026
JournalSmall
Volume13
Issue number30
DOIs
StatePublished - Aug 11 2017

Keywords

  • graphene
  • high volumetric performance
  • secondary assembly
  • supercapacitors

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

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