The synergistic effect of metal oxide templates and salt activation for supercapacitor materials in neutral, alkaline, and organic electrolytes

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-02-21 DOI:10.1016/j.diamond.2025.112134

Pengfei Dong, Xueyan Wu, Hongxia Gao, Yan Lv, Rui Xue, Yanchun Pei, Jixi Guo

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Abstract

This study investigates the synthesis of high-performance 2D carbon nanosheets (CNs-Mg-Zn) via a synergistic approach combining MgO templating and ZnCl₂ activation. Utilizing coal as the carbon source and urea as a doping agent, CNs-Mg-Zn were prepared, achieving a specific surface area of 1638 m² g⁻¹ and pore volume of 1.37 cm³ g⁻¹. In a three-electrode system, the material exhibited a capacitance of 343 F g⁻¹ at 0.5 A g⁻¹. The assembled symmetrical supercapacitors (SCs) assembled from CNs-Mg-Zn demonstrated energy densities of 12, 21.4, and 48.5 Wh kg⁻¹ in 6 M KOH, 1 M Na₂SO₄, and 1 M TEABF₄/AN, respectively, with 97.4 % capacitance retention after 10,000 cycles. This study proposes a method for preparing carbon nanosheets by utilizing MgO templates in combination with ZnCl₂ activation. This method provides a promising approach for the large-scale preparation of advanced electrode materials.

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本研究采用氧化镁模板化和氯化锌活化相结合的协同方法，研究了高性能二维碳纳米片（CNs-Mg-Zn）的合成。利用煤炭作为碳源，尿素作为掺杂剂，制备出了比表面积为 1638 m2 g-1 和孔体积为 1.37 cm3 g-1 的 CNs-Mg-Zn。在三电极系统中，该材料在 0.5 A g-1 时的电容为 343 F g-1。由 CNs-Mg-Zn 组装而成的对称超级电容器（SC）在 6 M KOH、1 M Na₂SO₄ 和 1 M TEABF₄/AN 中的能量密度分别为 12、21.4 和 48.5 Wh kg-1，循环 10,000 次后电容保持率为 97.4%。本研究提出了一种利用氧化镁模板结合氯化锌活化制备碳纳米片的方法。该方法为大规模制备先进电极材料提供了一种可行的方法。

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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.