Superior environmentally friendly stretchable supercapacitor based on nitrogen-doped graphene/hydrogel and single-walled carbon nanotubes

Evgeniia Gilshtein*, Cristina Flox Donoso, Farhan Ali, Bahareh Mehrabimatin, Fedor S. Fedorov, Shaoting Lin, Xuanhe Zhao, Albert Nasibulin*, Tanja Kallio*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Lightweight and flexible supercapacitors with high volumetric capacitance are vitally required for wearable and portable energy storage devices. We propose an eco-friendly, simple-to-fabricate high performance supercapacitor, which consists of a solid state material based on nitrogen-doped graphene flake electrodes distributed in the NaCl-containing hydrogel electrolyte, achieving a large surface area interface. Stretchability is achieved by sandwiching this structure between two single-walled carbon nanotube film current collectors. The as-prepared quasi-solid material exhibits outstanding volumetric capacitive performance, high energy density and power density values, attaining corresponding values of 806 F cm−3, 112 mW h cm−3 and 294 W cm−3 at 0.3 A g−1. This superior capacitive behavior is due to the excellent network comprising NaCl-containing hydrogel, N-Graphene powder and carbon nanotube film, offering new strategy for developing of sustainable high-performance supercapacitors. © 2020 Elsevier Ltd
Original languageEnglish
Article number101505
JournalJournal of Energy Storage
Volume30
DOIs
Publication statusPublished - 1 Aug 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Nitrogen-doped graphene
  • Doped hydrogel
  • Stretchable supercapacitor
  • Energy storage
  • Composite powder

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