A facile one-pot synthesis of hierarchical porous carbon for supercapacitor electrodes

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Diamond and Related Materials Pub Date : 2024-10-31 DOI:10.1016/j.diamond.2024.111728

Seoyeong Cheon , Seongjae Myeong , In Woo Lee , Sei-Hyun Lee , Young-Seak Lee

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Abstract

This study presents a facile, environmentally friendly approach to fabricate hierarchical porous carbon for supercapacitor electrodes. The one-pot synthesis of PFO/silica/PTFE via co-pyrolysis generates ideal hierarchical porous carbon. Compared with traditional methods, this method eliminates toxic solvents and complex cleaning steps. PPC-2 obtained under the optimized activation time has the highest specific surface area (2657 m² g⁻¹) and a remarkable total pore volume (2.96 cm³ g⁻¹). These properties result in a remarkable specific capacitance of 335.9–210.8 F g⁻¹ at current densities of 0.5–10 A g⁻¹ in KOH electrolyte. The electrochemical performance of the PPC-2 electrode in a symmetric supercapacitor device was measured in aqueous (6 M KOH) and ionic liquid (EMIM-TFSI) electrolytes. In EMIM-TFSI, PPC-2//PPC-2 provides an energy density of 48.5 Wh/kg even at a power density of 750 W kg⁻¹. This facile one-pot synthesis method offers a sustainable and scalable approach to produce high-performance hierarchical porous carbon for supercapacitor applications.

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用于超级电容器电极的分层多孔碳的简单一锅合成法

本研究提出了一种简便、环保的方法来制造用于超级电容器电极的分层多孔碳。通过共聚乙二醇法一锅合成 PFO/二氧化硅/聚四氟乙烯可生成理想的分层多孔碳。与传统方法相比，该方法省去了有毒溶剂和复杂的清洗步骤。在优化活化时间下获得的 PPC-2 具有最高的比表面积（2657 平方米 g-1）和显著的总孔隙率（2.96 立方厘米 g-1）。在 KOH 电解液中，当电流密度为 0.5-10 A g-1 时，这些特性可产生 335.9-210.8 F g-1 的显著比电容。在水性（6 M KOH）和离子液体（EMIM-TFSI）电解质中测量了对称超级电容器装置中 PPC-2 电极的电化学性能。在 EMIM-TFSI 中，即使功率密度为 750 W kg-1，PPC-2//PPC-2 也能提供 48.5 Wh/kg 的能量密度。这种简单的一锅合成方法为超级电容器应用提供了一种可持续、可扩展的高性能分层多孔碳生产方法。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.