石墨烯
共价键
阳极
材料科学
氧化物
循环伏安法
电化学
碳纤维
氮化碳
锂(药物)
化学工程
钠离子电池
氮化物
无机化学
纳米技术
电极
化学
复合数
图层(电子)
有机化学
物理化学
催化作用
复合材料
冶金
内分泌学
法拉第效率
工程类
光催化
医学
作者
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
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2021-11-17
卷期号:9 (47): 15946-15956
被引量:3
标识
DOI:10.1021/acssuschemeng.1c06164
摘要
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.
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