热处理温度对沥青基硼氮共掺杂多孔炭结构与电化学性能的影响
以煤液化沥青质为碳源、硝酸为氮源、硼酸为硼源和造孔剂制备硼氮共掺杂多孔炭,研究了热处理温度对其孔结构和表面性质的影响,测试了产品作为超级电容器电极材料的性能.用X射线衍射(XRD)、拉曼光谱、扫描电镜(SEM)、透射电镜(TEM)、N2吸附、元素分析、电感耦合等离子体发射光谱(ICP-AES)、X射线光电子能谱(XPS)、电化学工作站等对材料的结构、组成及电化学性能进行了表征.结果表明:随着热处理温度的升高,产品的石墨化程度逐渐升高;比表面积、总孔容呈先增加后减小的趋势;氮含量随着热处理温度的升高逐渐降低,而硼含量则随着热处理温度的升高逐渐增加;材料的比电容随着热处理温度的升高先逐渐增加后减小...
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| Published in | 物理化学学报 Vol. 30; no. 6; pp. 1127 - 1133 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
大连理工大学炭素材料研究室,辽宁省能源材料化工重点实验室,精细化工国家重点实验室,辽宁大连116024
2014
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-6818 |
| DOI | 10.3866/PKU.WHXB201404013 |
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| Summary: | 以煤液化沥青质为碳源、硝酸为氮源、硼酸为硼源和造孔剂制备硼氮共掺杂多孔炭,研究了热处理温度对其孔结构和表面性质的影响,测试了产品作为超级电容器电极材料的性能.用X射线衍射(XRD)、拉曼光谱、扫描电镜(SEM)、透射电镜(TEM)、N2吸附、元素分析、电感耦合等离子体发射光谱(ICP-AES)、X射线光电子能谱(XPS)、电化学工作站等对材料的结构、组成及电化学性能进行了表征.结果表明:随着热处理温度的升高,产品的石墨化程度逐渐升高;比表面积、总孔容呈先增加后减小的趋势;氮含量随着热处理温度的升高逐渐降低,而硼含量则随着热处理温度的升高逐渐增加;材料的比电容随着热处理温度的升高先逐渐增加后减小.其中900°C热处理的样品比表面积达到1103 m2·g-1,总孔容为0.921 cm3·g-1,氮含量为5.256%(w),硼含量为1.703%(w),在6 mol·L-1 KOH电解液中当电流密度为100 mA·g-1时质量比电容为349 F·g-1;而经过1000°C热处理的样品表现出最好的倍率特性,电流密度从100 mA·g-1增加到10 A·g-1时比电容保持率为75%. |
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| Bibliography: | 11-1892/06 B/N co-doped porous carbons have been synthesized by heat treatment at different temperatures using asphaltene from coal liquefaction residue as a carbon precursor, nitric acid as a nitrogen source, H3BO3 as a boron source and a pore-forming agent. The influence of the heat treatment temperature on the pore-structure and surface chemical properties was investigated, and the electrochemical performance in relation to the pore-structure and surface chemical properties was discussed. The crystal structure, morphology, pore-structure, composition and electrochemical performance were examined using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption, element analysis, inductively coupled plasma-atomic emission spectroscopy (ICP-AES), X-ray photoelectron spectroscopy (XPS), and an electrochemical workstation. The results of these analyses indicated that the crystal structure, pore-structure and surface properties were |
| ISSN: | 1000-6818 |
| DOI: | 10.3866/PKU.WHXB201404013 |