Carbon nanotubes/graphitic carbon nitride nanocomposites for all-solid-state supercapacitors

Chao LU, Xi CHEN*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

15 Citations (Scopus)

Abstract

All-solid-state supercapacitors with high power density and working stability are high-efficiency energy storage devices for smart electronic equipment. Developing electrode materials with fast ions and electrons transport is critical to improving the energy storage capability. Here, we report carbon nanotubes/graphitic carbon nitride nanocomposites with large specific surface area, porous structure and high electrical conductivity toward high-performance supercapacitors. The large surface area with porosity provides reservoir for ion accommodation during charge-discharge processes, and the high conductivity facilitates electrons and ions transport. Furthermore, nitrogen sites in electrodes contribute significant pseudocapacitance for supercapacitors. The nanocomposites based device gives a high specific capacity of 148 F g−1 at current density of 1 A g−1 with good rate capability from 1 to 10 A g−1. Additionally, the device displays excellent working stability with capacitance retention of 93% even after 10000 cycles at 1 A g−1 under 0.8 V in air. This study sheds light on design of nanocomposites with highly efficient charge transfer and will accelerate development of next-generation solid state energy devices. © 2020, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
Original languageEnglish
Pages (from-to)1714-1720
Number of pages6
JournalScience China Technological Sciences
Volume63
Issue number9
DOIs
Publication statusPublished - 2020
Externally publishedYes

Bibliographical note

This work was supported by the Earth Engineering Center, and Center for Advanced Materials for Energy and Environment at Columbia University.

Keywords

  • carbon nanotubes
  • graphitic carbon nitride
  • high capacity
  • nanocomposite
  • nitrogen doping
  • supercapacitors

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