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 language | English |
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Pages (from-to) | 15946-15956 |
Number of pages | 11 |
Journal | ACS Sustainable Chemistry and Engineering |
Volume | 9 |
Issue number | 47 |
DOIs | |
State | Published - 29 Nov 2021 |
Externally published | Yes |
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