基于碳酸镁模板的氮掺杂多孔炭的制备及其电化学性能

doi:10.11901/1005.3093.2017.353

材料研究学报

2018, Vol. 32

Issue (8): 599-606 DOI: 10.11901/1005.3093.2017.353

研究论文

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基于碳酸镁模板的氮掺杂多孔炭的制备及其电化学性能

范景彪¹, 李志伟¹, 骆建敏², 黄艳¹, 陈楠楠¹, 米红宇¹(

)

1 新疆大学新疆维吾尔自治区洁净煤转化与化工过程重点实验室乌鲁木齐 830046
2 新疆大学理化测试中心乌鲁木齐 830046

Preparation and Electrochemical Performance of Nitrogen-Doped Porous Carbon with MgCO₃ as Template

Jingbiao FAN¹, Zhiwei LI¹, Jianmin LUO², Yan HUANG¹, Nannan CHEN¹(

), Hongyu MI¹

1 Xinjiang Uygur Autonomous Region Key Laboratory of Coal Clean Conversion and Chemical Engineering Process, Xinjiang University, Urumqi 830046, China
2 Physical and Chemical Detecting Center, Xinjiang University, Urumqi 830046, China

引用本文:

范景彪, 李志伟, 骆建敏, 黄艳, 陈楠楠, 米红宇. 基于碳酸镁模板的氮掺杂多孔炭的制备及其电化学性能[J]. 材料研究学报, 2018, 32(8): 599-606.
Jingbiao FAN, Zhiwei LI, Jianmin LUO, Yan HUANG, Nannan CHEN, Hongyu MI. Preparation and Electrochemical Performance of Nitrogen-Doped Porous Carbon with MgCO₃ as Template[J]. Chinese Journal of Materials Research, 2018, 32(8): 599-606.

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摘要:

以碳酸镁为模板、聚苯胺为炭源、聚乙二醇为粘接剂,通过简单的炭化过程制得氮掺杂多孔炭(C2)。以聚苯胺直接炭化物(C1)作为对比样。使用扫描电镜、透射电镜、N₂吸脱附、热重、红外光谱、拉曼光谱、X射线衍射谱、X光电子能谱等手段对样品进行了表征。结果表明,多孔的C2样品比表面积为249.8 m²/g,远比C1的(19.8 m²/g)高。C1和C2中的氮原子含量(原子分数)接近,分别为5.48%和4.8%。较高的比表面积和一定的氮掺杂使C2具有良好的电化学电容行为。在电流密度为1 A/g的条件下C2的比电容为268 F/g,经过8000圈的充放电循环(电流密度为4 A/g)表现出极好的电化学稳定性。

关键词 ：无机非金属材料, 多孔炭, 碳酸镁模板, 聚苯胺, 超级电容器

Abstract：

N-doped porous carbon (C2) was prepared by simple carbonization process with MgCO₃ as template, synthesized polyaniline (PANI) as carbon source and polyethylene glycol (PEG) as binder. Meanwhile, PANI was directly carbonized to prepare (C1) for comparison. The morphology, structure and composition of the prepared porous carbon were characterized by scanning electron microscopy, transmission electron microscopy, N₂ adsorption, thermogravimetry, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray powder diffraction and X-ray photoelectron spectroscopy. Results show that specific surface area of C2 is 249.8 m²/g, far higher than that of C1 (19.8 m²/g). The N-contents of the two porous carbons were similar i.e. 5.48% (C1) and 4.8% (C2), respectively. Both of the high specific surface area and certain amount of N-doping endowed C2 with good electrochemical capacitive properties. The specific capacitance of C2 is 268 F/g by current density of 1 A/g. Besides, the N-doped porous carbon (C2) exhibited excellent stability after 8000 cycles of charge-discharge by current density of 4 A/g.

Key words： inorganic non-metallic materials porous carbon polyaniline MgCO₃ template supercapacitor

收稿日期: 2017-08-31

ZTFLH:

TQ127

基金资助:资助项目国家自然科学基金(21563029)

作者简介:

作者简介范景彪,男,1991年生,硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2017.353 或 https://www.cjmr.org/CN/Y2018/V32/I8/599

图1 样品C1和C2的N2吸脱附曲线和BJH孔径分布

表1 样品C1、C2的比表面积和孔结构参数

图2 PANI,C1和C2的SEM和TEM照片

图3 样品的热重曲线

图4 C1和C2的FTIR,XRD,Raman以及XPS谱图

表2 XPS表面元素组成

图5 C1和C2的C1s、N1s和O1s高分辨谱图

图6 C2电极在不同扫描速率下的循环伏安曲线、在不同电流密度下的恒流充放电曲线、循环充放电和库伦效率曲线以及交流阻抗曲线(插图为高频区放大图)

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