基于羧甲基纤维素钠制备氮掺杂多孔炭及其电容性能研究

doi:10.3866/PKU.WHXB201210231

物理化学学报 >> 2013, Vol. 29 >> Issue (01): 102-110.doi: 10.3866/PKU.WHXB201210231

基于羧甲基纤维素钠制备氮掺杂多孔炭及其电容性能研究

陈崇, 陈祥迎, 谢东华

合肥工业大学化学工程学院, 可控化学与材料化工安徽省重点实验室, 合肥 230009

收稿日期:2012-10-02 修回日期:2012-10-18 发布日期:2012-12-14
通讯作者: 陈祥迎 E-mail:cxyhfut@gmail.com
基金资助:
国家自然科学基金(21101052); 安徽省自然科学基金(090414194); 中国博士后科学基金(20100480045)和中央高校基本科研业务费专项资金资助

Synthesis of Nitrogen Doped Porous Carbons from Sodium Carboxymethyl Cellulose and the Capacitive Performance

CHEN Chong, CHEN Xiang-Ying, XIE Dong-Hua

Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, School of Chemical Engineering, Hefei University of Technology, Anhui 230009, P. R. China

Received:2012-10-02 Revised:2012-10-18 Published:2012-12-14
Supported by:
The project was supported by the National Natural Science Foundation of China (21101052), Anhui Provincial Natural Science Foundation, China (090414194), China Postdoctoral Science Foundation (20100480045), and Fundamental Research Funds for the Central Universities, China.

摘要/Abstract

摘要：

以羧甲基纤维素钠(NaCMC)为碳源, 利用直接炭化工艺(无需进一步活化)制备多孔炭材料; 然后, 以CO(NH₂)₂为氮源, 形成了氮掺杂多孔炭材料. 氮的存在形式包括吡啶N、石墨N和吡咯N. 实验结果表明, 羧甲基纤维素钠与CO(NH₂)₂之间的配比可以有效控制氮存在形式、含量、样品的比表面积及孔的结构等. 样品的电化学性能测试表明, 氮掺杂后多孔炭材料的超电容性能得到了显著提升. 以carbon-N-1:20为例, 其比表面积可达858 m²·g^-1, 远高于未经氮掺杂carbon-blank 的463 m²·g^-1, 其质量比电容则由94.0 F·g^-1提高到了156.7F·g^-1.

关键词: 羧甲基纤维素钠, 多孔炭, 氮掺杂, 电容性能

Abstract:

We demonstrate a direct carbonization method to prepare porous carbons as electrode materials without an activation process, using sodium carboxymethyl cellulose (NaCMC) as the carbon source, which are further doped with varying mass ratios of nitrogen. From X-ray photoelectron data, the nitrogen species include pyridinic N, graphitic N, and pyrrolic N. The relative mass ratios of NaCMC and CO(NH₂)₂ affect the nature of the nitrogen species, dopant dosages as well as specific surface areas and pore structures. The cyclic voltammetry and galvanostatic charge-discharge measurements in 6 mol·L^-1 KOH aqueous solutions reveal that the specific surface areas and capacitive performances improve after nitrogen-doping. Taking carbon-N-1:20 as example, its S_BET can reach 858 m²·g^-1, which is higher than that of carbon-blank (463 m²·g^-1) and the corresponding specific capacitance greatly improves from 94.0 to 156.7 F· g^-1, respectively. The present carbons are excellent electrode candidates for high-rate electrochemical capacitors.

Key words: Sodium carboxymethyl cellulose, Porous carbon, Nitrogen doping, Capacitive performance

陈崇, 陈祥迎, 谢东华. 基于羧甲基纤维素钠制备氮掺杂多孔炭及其电容性能研究[J]. 物理化学学报, 2013, 29(01): 102-110.

CHEN Chong, CHEN Xiang-Ying, XIE Dong-Hua. Synthesis of Nitrogen Doped Porous Carbons from Sodium Carboxymethyl Cellulose and the Capacitive Performance[J]. Acta Phys. -Chim. Sin., 2013, 29(01): 102-110.

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB201210231

https://www.whxb.pku.edu.cn/CN/Y2013/V29/I01/102

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基于羧甲基纤维素钠制备氮掺杂多孔炭及其电容性能研究

Synthesis of Nitrogen Doped Porous Carbons from Sodium Carboxymethyl Cellulose and the Capacitive Performance

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