Porous nitrogen-doped carbon/carbon nanocomposite electrodes enable sodium ion capacitors with high capacity and rate capability

Runyu Yan (Corresponding author), Karen Leus, Jan P. Hofmann, Markus Antonietti, Martin Oschatz (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)
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Abstract

The realization of electrochemical energy storage devices combining high energy and power density places high demands on the electrode materials. It remains difficult to provide high metal storage capacity and rate capability at the same time in one and the same material. By decoupling metal storage and electron transport in different phases of a nanostructured electrode composed of nitrogen-rich carbon nanoparticles which are embedded into a conductive mesoporous carbon matrix, this dilemma can be minimized. The composite material has a remarkable performance for sodium storage with a reversible capacity of 343 mAh g−1 at 0.1 A g−1 and capacity retention of 124 mAh g−1 at 20 A g−1. This work shows that a properly designed nanocomposite material can fulfill both requirements and sheds new light on resolving the seemingly conflicting energy/power density demands in current electrochemical energy storage devices.

Original languageEnglish
Article number104240
Number of pages8
JournalNano Energy
Volume67
DOIs
Publication statusPublished - Jan 2020

Keywords

  • Electrochemical energy storage
  • Electron transport
  • Nitrogen-doped carbon
  • Porous carbon materials
  • Sodium ion capacitors

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