Covalently Induced Grafting of C2N Nanoflakes onto Reduced Graphene Oxide with Dominant Pseudocapacitive Behaviors for a High-Rate Sodium-Ion Battery Anode

Tong Guo, Peng Chen, Lin Liu, Juanjuan Ma, Jingwen Sun, Yichen Ding, Jianbo Xu, Yuanqiang Song, Haiqun Chen, Xiaoping Ouyang, Xin Wang, Junwu Zhu, Yongsheng Fu

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Nitrogen-doped carbon materials are widely used in sodium-ion batteries, but their uncertain doping structure, low nitrogen content, and sluggish sodiation kinetics hinder their practical application. Herein, thin-layer carbon nitride (C2N) with accurate nitrogen bonding location, ultrahigh nitrogen content, and an inherent nanohole structure is covalently confined onto the surface of reduced graphene oxide (C2N/rGO) via an SN1 nucleophilic substitution reaction combined with in situ polymerization. Benefiting from the abundant active sites, a short ion/electron transfer distance, and good conductivity, the C2N/rGO electrode delivers a capacity of 218.1 mAh g-1 after 1000 cycles at 1 A g-1. Moreover, the Na-storage mechanism is proven to be a capacity governed process through cyclic voltammetry (CV) and galvanostatic intermittent titration technique (GITT) methods. This work demonstrates a viable strategy to design an atomically ordered porous nitrogen-containing two-dimensional (2D) carbon material with excellent electrochemical performances.

Original languageEnglish
Pages (from-to)15946-15956
Number of pages11
JournalACS Sustainable Chemistry and Engineering
Volume9
Issue number47
DOIs
StatePublished - 29 Nov 2021
Externally publishedYes

Keywords

  • CN/rGO
  • anode
  • capacitance behavior
  • graphene
  • high-rate performance
  • nitrogen-containing materials
  • sodium-ion batteries

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Renewable Energy, Sustainability and the Environment

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