纳米CaCO<sub>3</sub>模板法合成石油沥青基多孔类石墨烯炭材料

刘明杰; 魏风; 杨雪梅; 董仕安; 李英杰; 何孝军

doi:10.1016/S1872-5805(18)60342-7

纳米CaCO₃模板法合成石油沥青基多孔类石墨烯炭材料

doi: 10.1016/S1872-5805(18)60342-7

安徽工业大学化学与化工学院, 安徽马鞍山 243002

基金项目: 国家自然科学基金（1361110，1710116）.

详细信息

作者简介:
刘明杰,学士.E-mail:947514654@qq.com

通讯作者:
何孝军,教授.E-mail:agdxjhe@126.com

中图分类号: TQ127.1⁺1
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出版历程
- 收稿日期: 2018-06-01
- 录用日期: 2018-08-30
- 修回日期: 2018-08-01
- 刊出日期: 2018-08-28

Synthesis of porous graphene-like carbon materials for high-performance supercapacitors from petroleum pitch using nano-CaCO₃ as a template

School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China

Funds: National Natural Science Foundation of China (1361110, 1710116).

摘要

摘要: 利用纳米CaCO₃模板耦合原位KOH活化方法合成出超级电容器用多孔类石墨烯炭材料（PGCMs）。采用透射电子显微镜、拉曼光谱、X射线光电子能谱和N₂吸脱附技术对PGCMs进行了表征。结果表明，PGCMs的比表面积为1 542~2 305 m² g^-1，其取决于模板、KOH/沥青的比例和活化温度。当模板/沥青比为1.5、KOH/沥青比为1.5，在850℃恒温1 h所得PGCM的超电容性能最佳。同时，PGCMs具有相互连接的类石墨烯炭层和丰富的分级短孔。在6 M KOH电解液中，0.05 A g^-1电流密度下，超级电容器用PGCMs电极的比容高达293 F g^-1；在20 A g^-1电流密度下，其电容保持为231 F g^-1，显示了良好的倍率性能；经7 000次循环充放电后，其电容保持率为97.4%，展现了优异的循环稳定性。此外，在BMIMPF₆离子液体电解液中，0.05 A g^-1电流密度下，PGCMs电极的比容高达267 F g^-1。PGCMs超级电容器的能量密度达148.3 Wh kg^-1，其相应的平均功率密度为204.2 W kg^-1。本工作为利用廉价的纳米CaCO₃模板合成高性能超级电容器用石油沥青基多孔类石墨烯炭材料提供了一种可行的方法。
- 石油沥青 /
- 纳米CaCO₃模板 /
- 多孔类石墨烯炭材料 /
- 超级电容器
Abstract: Porous graphene-like carbon materials (PGCMs) for supercapacitors were synthesized from petroleum pitch by a nano-CaCO₃ template strategy combined with KOH activation. The PGCMs were characterized by TEM, XPS, Raman spectroscopy and N₂ adsorption. Results show that their specific surface areas are 1 542-2 305 m² g^-1, depending on the template/pitch ratio, KOH/pitch ratio and activation temperature. The PGCMs feature interconnected graphene-like carbon layers with abundant small pores. The optimum supercapacitor electrode is produced when the PGCM is synthesized with a template/pitch ratio of 1.5, a KOH/pitch ratio of 1.5 at 850℃ for 1h. It has a specific capacitance of 293 F g^-1 at a current density of 0.05 A g^-1, an excellent rate capability with a capacitance of 231 F g^-1 at a current density of 20 A g^-1 and an outstanding cycling stability with a 97.4% capacitance retention after 7 000 cycles in a 6 M KOH aqueous electrolyte. It also exhibits a high specific capacitance of 267 F g^-1 at a current density of 0.05 A g^-1, and a high energy density of 148.3 Wh kg^-1 at a power density of 204.2 W kg^-1 in a BMIMPF₆ ionic liquid electrolyte. This is a possible method for the synthesis of PGCMs for high-performance supercapacitors.
- Petroleum pitch /
- Nano-CaCO₃ template /
- Porous graphene-like carbon material /
- Supercapacitor

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Pu J, Li C W, Tang L, et al. Impregnation assisted synthesis of 3D nitrogen-doped porous carbon with high capacitance[J]. Carbon, 2015, 94:650-660. 《新型炭材料》荣获第四届中国政府出版奖近日,国家新闻出版广电总局评选出第四届中国政府出版奖,《新型炭材料》榜上有名。中国政府出版奖是国家为做强精品,加强传播能力建设,在全国出版行业评选出的一批优秀出版物,是我国最高出版奖。本次获奖,已是《新型炭材料》连续两届荣膺该奖项。《新型炭材料》近年来秉承为中国炭材料研究当好桥梁和窗口的宗旨,追踪学科前沿,刊发优质学术文章,致力于打造精品学术期刊。

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